./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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.12.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54640fbb6743a38bf41f3a8b2318fcad885a58c92146d7845af619d355e32c56 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:09:53,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:09:53,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:09:53,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:09:53,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:09:53,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:09:53,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:09:53,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:09:53,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:09:53,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:09:53,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:09:53,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:09:53,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:09:53,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:09:53,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:09:53,684 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:09:53,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:09:53,686 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:09:53,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:09:53,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:09:53,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:09:53,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:09:53,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:09:53,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:09:53,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:09:53,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:09:53,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:09:53,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:09:53,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:09:53,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:09:53,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:09:53,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:09:53,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:09:53,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:09:53,707 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:09:53,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:09:53,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:09:53,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:09:53,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:09:53,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:09:53,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:09:53,710 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:09:53,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:09:53,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:09:53,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:09:53,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:09:53,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:09:53,736 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:09:53,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:09:53,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:09:53,737 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:09:53,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:09:53,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:09:53,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:09:53,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:09:53,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:09:53,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:09:53,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:09:53,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:09:53,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:09:53,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:09:53,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:09:53,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:09:53,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:09:53,740 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:09:53,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:09:53,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:09:53,740 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:09:53,740 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:09:53,740 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:09:53,741 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:09:53,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:09:53,741 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:09:53,741 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:09:53,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:09:53,741 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:09:53,742 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54640fbb6743a38bf41f3a8b2318fcad885a58c92146d7845af619d355e32c56 [2021-12-17 21:09:53,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:09:53,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:09:53,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:09:53,934 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:09:53,935 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:09:53,935 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c [2021-12-17 21:09:53,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b654a3957/14f2fe5166114e398dcf4e6333223ef6/FLAG4fd573948 [2021-12-17 21:09:54,392 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:09:54,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c [2021-12-17 21:09:54,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b654a3957/14f2fe5166114e398dcf4e6333223ef6/FLAG4fd573948 [2021-12-17 21:09:54,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b654a3957/14f2fe5166114e398dcf4e6333223ef6 [2021-12-17 21:09:54,419 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:09:54,420 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:09:54,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:09:54,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:09:54,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:09:54,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5360643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54, skipping insertion in model container [2021-12-17 21:09:54,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:09:54,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:09:54,597 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.12.cil-1.c[911,924] [2021-12-17 21:09:54,660 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.12.cil-1.c[8416,8429] [2021-12-17 21:09:54,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:09:54,768 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:09:54,776 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.12.cil-1.c[911,924] [2021-12-17 21:09:54,794 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.12.cil-1.c[8416,8429] [2021-12-17 21:09:54,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:09:54,848 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:09:54,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54 WrapperNode [2021-12-17 21:09:54,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:09:54,850 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:09:54,850 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:09:54,850 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:09:54,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,913 INFO L137 Inliner]: procedures = 79, calls = 98, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1083 [2021-12-17 21:09:54,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:09:54,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:09:54,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:09:54,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:09:54,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,930 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:09:54,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:09:54,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:09:54,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:09:54,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (1/1) ... [2021-12-17 21:09:54,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:09:54,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:09:54,989 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) [2021-12-17 21:09:54,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:09:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:09:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:09:55,015 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:09:55,015 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-17 21:09:55,015 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-17 21:09:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:09:55,016 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:09:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:09:55,016 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:09:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-17 21:09:55,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-17 21:09:55,016 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:09:55,016 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:09:55,017 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:09:55,018 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:09:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-17 21:09:55,020 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-17 21:09:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-17 21:09:55,020 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-17 21:09:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-17 21:09:55,020 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-17 21:09:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:09:55,020 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:09:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:09:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:09:55,021 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:09:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-17 21:09:55,021 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-17 21:09:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:09:55,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:09:55,021 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:09:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:09:55,022 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-17 21:09:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-17 21:09:55,118 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:09:55,119 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:09:55,731 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-17 21:09:55,732 INFO L768 $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; [2021-12-17 21:09:55,777 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:09:55,785 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:09:55,785 INFO L301 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-17 21:09:55,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:09:55 BoogieIcfgContainer [2021-12-17 21:09:55,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:09:55,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:09:55,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:09:55,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:09:55,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:09:54" (1/3) ... [2021-12-17 21:09:55,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74009212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:09:55, skipping insertion in model container [2021-12-17 21:09:55,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:54" (2/3) ... [2021-12-17 21:09:55,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74009212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:09:55, skipping insertion in model container [2021-12-17 21:09:55,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:09:55" (3/3) ... [2021-12-17 21:09:55,792 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.12.cil-1.c [2021-12-17 21:09:55,796 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:09:55,796 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:09:55,829 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:09:55,834 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 [2021-12-17 21:09:55,834 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:09:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 507 states, 445 states have (on average 1.6426966292134833) internal successors, (731), 453 states have internal predecessors, (731), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-17 21:09:55,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:55,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:55,861 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] [2021-12-17 21:09:55,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:55,865 INFO L85 PathProgramCache]: Analyzing trace with hash -813497817, now seen corresponding path program 1 times [2021-12-17 21:09:55,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:55,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029563969] [2021-12-17 21:09:55,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:55,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:56,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:56,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:56,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029563969] [2021-12-17 21:09:56,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029563969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:56,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:56,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:09:56,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384863883] [2021-12-17 21:09:56,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:56,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:09:56,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:09:56,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:09:56,106 INFO L87 Difference]: Start difference. First operand has 507 states, 445 states have (on average 1.6426966292134833) internal successors, (731), 453 states have internal predecessors, (731), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-12-17 21:09:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:56,716 INFO L93 Difference]: Finished difference Result 1003 states and 1618 transitions. [2021-12-17 21:09:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:09:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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 65 [2021-12-17 21:09:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:56,728 INFO L225 Difference]: With dead ends: 1003 [2021-12-17 21:09:56,728 INFO L226 Difference]: Without dead ends: 514 [2021-12-17 21:09:56,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:09:56,735 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 1108 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1120 SdHoareTripleChecker+Valid, 1825 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:56,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1120 Valid, 1825 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:09:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-17 21:09:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 496. [2021-12-17 21:09:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 437 states have (on average 1.5560640732265447) internal successors, (680), 442 states have internal predecessors, (680), 44 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2021-12-17 21:09:56,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 764 transitions. [2021-12-17 21:09:56,788 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 764 transitions. Word has length 65 [2021-12-17 21:09:56,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:56,788 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 764 transitions. [2021-12-17 21:09:56,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 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) [2021-12-17 21:09:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 764 transitions. [2021-12-17 21:09:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:56,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:56,792 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] [2021-12-17 21:09:56,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:09:56,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:56,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:56,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2094684069, now seen corresponding path program 1 times [2021-12-17 21:09:56,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:56,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148246923] [2021-12-17 21:09:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:56,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:56,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:56,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:56,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148246923] [2021-12-17 21:09:56,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148246923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:56,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:56,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:09:56,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499162337] [2021-12-17 21:09:56,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:56,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:09:56,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:56,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:09:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:56,916 INFO L87 Difference]: Start difference. First operand 496 states and 764 transitions. 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) [2021-12-17 21:09:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:57,780 INFO L93 Difference]: Finished difference Result 751 states and 1133 transitions. [2021-12-17 21:09:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:57,780 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 [2021-12-17 21:09:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:57,792 INFO L225 Difference]: With dead ends: 751 [2021-12-17 21:09:57,792 INFO L226 Difference]: Without dead ends: 647 [2021-12-17 21:09:57,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:09:57,794 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 899 mSDsluCounter, 1840 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2613 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:57,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [906 Valid, 2613 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:09:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-12-17 21:09:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 608. [2021-12-17 21:09:57,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 527 states have (on average 1.5294117647058822) internal successors, (806), 534 states have internal predecessors, (806), 57 states have call successors, (57), 22 states have call predecessors, (57), 22 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2021-12-17 21:09:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 921 transitions. [2021-12-17 21:09:57,836 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 921 transitions. Word has length 65 [2021-12-17 21:09:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:57,837 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 921 transitions. [2021-12-17 21:09:57,837 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) [2021-12-17 21:09:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 921 transitions. [2021-12-17 21:09:57,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:57,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:57,838 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] [2021-12-17 21:09:57,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:09:57,839 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash -521394587, now seen corresponding path program 1 times [2021-12-17 21:09:57,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:57,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535398252] [2021-12-17 21:09:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:57,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:57,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:57,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:57,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:57,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:57,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:57,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:57,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:57,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535398252] [2021-12-17 21:09:57,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535398252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:57,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:57,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:09:57,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248658465] [2021-12-17 21:09:57,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:57,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:09:57,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:57,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:09:57,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:57,918 INFO L87 Difference]: Start difference. First operand 608 states and 921 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) [2021-12-17 21:09:59,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:59,074 INFO L93 Difference]: Finished difference Result 1005 states and 1486 transitions. [2021-12-17 21:09:59,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:09:59,075 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 [2021-12-17 21:09:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:59,079 INFO L225 Difference]: With dead ends: 1005 [2021-12-17 21:09:59,079 INFO L226 Difference]: Without dead ends: 796 [2021-12-17 21:09:59,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:09:59,081 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 1479 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 3012 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:59,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 3012 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1458 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:09:59,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2021-12-17 21:09:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 720. [2021-12-17 21:09:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 617 states have (on average 1.5089141004862237) internal successors, (931), 626 states have internal predecessors, (931), 70 states have call successors, (70), 29 states have call predecessors, (70), 31 states have return successors, (79), 68 states have call predecessors, (79), 66 states have call successors, (79) [2021-12-17 21:09:59,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1080 transitions. [2021-12-17 21:09:59,123 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1080 transitions. Word has length 65 [2021-12-17 21:09:59,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:59,123 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 1080 transitions. [2021-12-17 21:09:59,123 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) [2021-12-17 21:09:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1080 transitions. [2021-12-17 21:09:59,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:59,126 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:59,126 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] [2021-12-17 21:09:59,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:09:59,126 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1744986599, now seen corresponding path program 1 times [2021-12-17 21:09:59,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:59,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377151899] [2021-12-17 21:09:59,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:59,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:59,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:59,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:59,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:59,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:59,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:59,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:59,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:59,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:59,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:59,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377151899] [2021-12-17 21:09:59,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377151899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:59,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:59,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:09:59,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675582239] [2021-12-17 21:09:59,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:59,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:09:59,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:09:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:09:59,219 INFO L87 Difference]: Start difference. First operand 720 states and 1080 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) [2021-12-17 21:10:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:00,894 INFO L93 Difference]: Finished difference Result 2266 states and 3277 transitions. [2021-12-17 21:10:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:10:00,894 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 [2021-12-17 21:10:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:00,903 INFO L225 Difference]: With dead ends: 2266 [2021-12-17 21:10:00,903 INFO L226 Difference]: Without dead ends: 1933 [2021-12-17 21:10:00,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:10:00,913 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 3878 mSDsluCounter, 2446 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3896 SdHoareTripleChecker+Valid, 3340 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:00,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3896 Valid, 3340 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:10:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2021-12-17 21:10:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1773. [2021-12-17 21:10:00,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1465 states have (on average 1.4177474402730375) internal successors, (2077), 1489 states have internal predecessors, (2077), 180 states have call successors, (180), 112 states have call predecessors, (180), 126 states have return successors, (212), 174 states have call predecessors, (212), 176 states have call successors, (212) [2021-12-17 21:10:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 2469 transitions. [2021-12-17 21:10:00,992 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 2469 transitions. Word has length 65 [2021-12-17 21:10:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:00,993 INFO L470 AbstractCegarLoop]: Abstraction has 1773 states and 2469 transitions. [2021-12-17 21:10:00,993 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) [2021-12-17 21:10:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 2469 transitions. [2021-12-17 21:10:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:10:00,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:00,994 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] [2021-12-17 21:10:00,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:10:00,995 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:00,995 INFO L85 PathProgramCache]: Analyzing trace with hash 813039065, now seen corresponding path program 1 times [2021-12-17 21:10:00,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:00,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262044768] [2021-12-17 21:10:00,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:00,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:01,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:01,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:10:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:10:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:10:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:10:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 21:10:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:10:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:01,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:01,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262044768] [2021-12-17 21:10:01,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262044768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:01,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:01,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:10:01,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749583453] [2021-12-17 21:10:01,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:01,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:10:01,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:01,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:10:01,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:10:01,146 INFO L87 Difference]: Start difference. First operand 1773 states and 2469 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) [2021-12-17 21:10:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:01,981 INFO L93 Difference]: Finished difference Result 3301 states and 4548 transitions. [2021-12-17 21:10:01,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:10:01,981 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 [2021-12-17 21:10:01,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:02,014 INFO L225 Difference]: With dead ends: 3301 [2021-12-17 21:10:02,014 INFO L226 Difference]: Without dead ends: 1921 [2021-12-17 21:10:02,016 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 [2021-12-17 21:10:02,017 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 668 mSDsluCounter, 2801 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:02,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 3553 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:10:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-12-17 21:10:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1813. [2021-12-17 21:10:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1497 states have (on average 1.404809619238477) internal successors, (2103), 1521 states have internal predecessors, (2103), 180 states have call successors, (180), 112 states have call predecessors, (180), 134 states have return successors, (220), 182 states have call predecessors, (220), 176 states have call successors, (220) [2021-12-17 21:10:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2503 transitions. [2021-12-17 21:10:02,089 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2503 transitions. Word has length 66 [2021-12-17 21:10:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:02,090 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2503 transitions. [2021-12-17 21:10:02,090 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) [2021-12-17 21:10:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2503 transitions. [2021-12-17 21:10:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:10:02,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:02,092 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] [2021-12-17 21:10:02,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:10:02,092 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:02,093 INFO L85 PathProgramCache]: Analyzing trace with hash -216320233, now seen corresponding path program 1 times [2021-12-17 21:10:02,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:02,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977051610] [2021-12-17 21:10:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:02,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:02,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:02,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:10:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:02,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:10:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:02,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:10:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:02,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:10:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:02,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 21:10:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:02,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:10:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:02,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:02,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977051610] [2021-12-17 21:10:02,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977051610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:02,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:02,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:10:02,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566772706] [2021-12-17 21:10:02,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:02,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:10:02,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:02,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:10:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:10:02,189 INFO L87 Difference]: Start difference. First operand 1813 states and 2503 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) [2021-12-17 21:10:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:03,657 INFO L93 Difference]: Finished difference Result 5385 states and 7377 transitions. [2021-12-17 21:10:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:10:03,657 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 [2021-12-17 21:10:03,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:03,687 INFO L225 Difference]: With dead ends: 5385 [2021-12-17 21:10:03,687 INFO L226 Difference]: Without dead ends: 2204 [2021-12-17 21:10:03,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:10:03,693 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 3952 mSDsluCounter, 2495 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3970 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 2502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 690 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:03,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3970 Valid, 3383 Invalid, 2502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [690 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:10:03,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-12-17 21:10:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2024. [2021-12-17 21:10:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 1636 states have (on average 1.3624694376528117) internal successors, (2229), 1662 states have internal predecessors, (2229), 220 states have call successors, (220), 140 states have call predecessors, (220), 166 states have return successors, (266), 224 states have call predecessors, (266), 216 states have call successors, (266) [2021-12-17 21:10:03,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 2715 transitions. [2021-12-17 21:10:03,758 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 2715 transitions. Word has length 66 [2021-12-17 21:10:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:03,758 INFO L470 AbstractCegarLoop]: Abstraction has 2024 states and 2715 transitions. [2021-12-17 21:10:03,758 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) [2021-12-17 21:10:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 2715 transitions. [2021-12-17 21:10:03,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:10:03,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:03,760 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] [2021-12-17 21:10:03,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:10:03,760 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1700315392, now seen corresponding path program 1 times [2021-12-17 21:10:03,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:03,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856624685] [2021-12-17 21:10:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:03,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:10:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:10:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:10:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:10:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:10:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:10:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:10:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:03,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:10:03,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:03,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856624685] [2021-12-17 21:10:03,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856624685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:03,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:03,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:10:03,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046071028] [2021-12-17 21:10:03,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:03,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:10:03,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:03,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:10:03,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:10:03,863 INFO L87 Difference]: Start difference. First operand 2024 states and 2715 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) [2021-12-17 21:10:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:04,691 INFO L93 Difference]: Finished difference Result 3849 states and 5117 transitions. [2021-12-17 21:10:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:10:04,691 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 [2021-12-17 21:10:04,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:04,700 INFO L225 Difference]: With dead ends: 3849 [2021-12-17 21:10:04,701 INFO L226 Difference]: Without dead ends: 2218 [2021-12-17 21:10:04,703 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 [2021-12-17 21:10:04,705 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 989 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 3134 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:04,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 3134 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:10:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-12-17 21:10:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2084. [2021-12-17 21:10:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 1684 states have (on average 1.3485748218527316) internal successors, (2271), 1710 states have internal predecessors, (2271), 220 states have call successors, (220), 140 states have call predecessors, (220), 178 states have return successors, (278), 236 states have call predecessors, (278), 216 states have call successors, (278) [2021-12-17 21:10:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2769 transitions. [2021-12-17 21:10:04,767 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2769 transitions. Word has length 91 [2021-12-17 21:10:04,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:04,768 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 2769 transitions. [2021-12-17 21:10:04,768 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) [2021-12-17 21:10:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2769 transitions. [2021-12-17 21:10:04,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:10:04,770 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:04,770 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] [2021-12-17 21:10:04,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:10:04,770 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2144216066, now seen corresponding path program 1 times [2021-12-17 21:10:04,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:04,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615618241] [2021-12-17 21:10:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:04,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:10:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:10:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:10:04,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:10:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:10:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:10:04,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:10:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:10:04,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:04,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615618241] [2021-12-17 21:10:04,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615618241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:04,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:04,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:10:04,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015647277] [2021-12-17 21:10:04,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:04,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:10:04,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:10:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:10:04,865 INFO L87 Difference]: Start difference. First operand 2084 states and 2769 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 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) [2021-12-17 21:10:05,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:05,654 INFO L93 Difference]: Finished difference Result 3611 states and 4733 transitions. [2021-12-17 21:10:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 21:10:05,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 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 91 [2021-12-17 21:10:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:05,662 INFO L225 Difference]: With dead ends: 3611 [2021-12-17 21:10:05,662 INFO L226 Difference]: Without dead ends: 2158 [2021-12-17 21:10:05,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-17 21:10:05,665 INFO L933 BasicCegarLoop]: 770 mSDtfsCounter, 1835 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1869 SdHoareTripleChecker+Valid, 2310 SdHoareTripleChecker+Invalid, 1471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:05,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1869 Valid, 2310 Invalid, 1471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:10:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2158 states. [2021-12-17 21:10:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2158 to 1863. [2021-12-17 21:10:05,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1516 states have (on average 1.354221635883905) internal successors, (2053), 1537 states have internal predecessors, (2053), 192 states have call successors, (192), 121 states have call predecessors, (192), 153 states have return successors, (238), 206 states have call predecessors, (238), 188 states have call successors, (238) [2021-12-17 21:10:05,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2483 transitions. [2021-12-17 21:10:05,718 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2483 transitions. Word has length 91 [2021-12-17 21:10:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:05,718 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 2483 transitions. [2021-12-17 21:10:05,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 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) [2021-12-17 21:10:05,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2483 transitions. [2021-12-17 21:10:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:10:05,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:05,719 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] [2021-12-17 21:10:05,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:10:05,720 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash -211589184, now seen corresponding path program 1 times [2021-12-17 21:10:05,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:05,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312437118] [2021-12-17 21:10:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:05,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:10:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:10:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:10:05,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:10:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:10:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:10:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:10:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:10:05,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312437118] [2021-12-17 21:10:05,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312437118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:05,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:05,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:05,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291388458] [2021-12-17 21:10:05,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:05,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:05,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:05,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:05,784 INFO L87 Difference]: Start difference. First operand 1863 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) [2021-12-17 21:10:06,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:06,077 INFO L93 Difference]: Finished difference Result 3439 states and 4539 transitions. [2021-12-17 21:10:06,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:10:06,078 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 [2021-12-17 21:10:06,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:06,085 INFO L225 Difference]: With dead ends: 3439 [2021-12-17 21:10:06,085 INFO L226 Difference]: Without dead ends: 1970 [2021-12-17 21:10:06,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:10:06,089 INFO L933 BasicCegarLoop]: 702 mSDtfsCounter, 1657 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1691 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:06,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1691 Valid, 1728 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:10:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-12-17 21:10:06,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1863. [2021-12-17 21:10:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1516 states have (on average 1.3304749340369393) internal successors, (2017), 1537 states have internal predecessors, (2017), 192 states have call successors, (192), 121 states have call predecessors, (192), 153 states have return successors, (238), 206 states have call predecessors, (238), 188 states have call successors, (238) [2021-12-17 21:10:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2447 transitions. [2021-12-17 21:10:06,141 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2447 transitions. Word has length 91 [2021-12-17 21:10:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:06,142 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 2447 transitions. [2021-12-17 21:10:06,142 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) [2021-12-17 21:10:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2447 transitions. [2021-12-17 21:10:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 21:10:06,143 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:06,143 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] [2021-12-17 21:10:06,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:10:06,143 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:06,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:06,144 INFO L85 PathProgramCache]: Analyzing trace with hash 845704345, now seen corresponding path program 1 times [2021-12-17 21:10:06,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:06,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627956404] [2021-12-17 21:10:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:06,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:10:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:10:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:10:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:10:06,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:10:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:10:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:10:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:10:06,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627956404] [2021-12-17 21:10:06,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627956404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:06,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:06,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:10:06,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181563293] [2021-12-17 21:10:06,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:06,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:10:06,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:06,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:10:06,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:10:06,223 INFO L87 Difference]: Start difference. First operand 1863 states and 2447 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) [2021-12-17 21:10:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:07,369 INFO L93 Difference]: Finished difference Result 4281 states and 5530 transitions. [2021-12-17 21:10:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 21:10:07,369 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 [2021-12-17 21:10:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:07,381 INFO L225 Difference]: With dead ends: 4281 [2021-12-17 21:10:07,381 INFO L226 Difference]: Without dead ends: 2661 [2021-12-17 21:10:07,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-17 21:10:07,386 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 2541 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2584 SdHoareTripleChecker+Valid, 2734 SdHoareTripleChecker+Invalid, 1982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:07,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2584 Valid, 2734 Invalid, 1982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 1497 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:10:07,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2021-12-17 21:10:07,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 2484. [2021-12-17 21:10:07,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2484 states, 1983 states have (on average 1.2904689863842662) internal successors, (2559), 2012 states have internal predecessors, (2559), 269 states have call successors, (269), 169 states have call predecessors, (269), 230 states have return successors, (369), 304 states have call predecessors, (369), 265 states have call successors, (369) [2021-12-17 21:10:07,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2484 states to 2484 states and 3197 transitions. [2021-12-17 21:10:07,456 INFO L78 Accepts]: Start accepts. Automaton has 2484 states and 3197 transitions. Word has length 92 [2021-12-17 21:10:07,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:07,457 INFO L470 AbstractCegarLoop]: Abstraction has 2484 states and 3197 transitions. [2021-12-17 21:10:07,458 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) [2021-12-17 21:10:07,458 INFO L276 IsEmpty]: Start isEmpty. Operand 2484 states and 3197 transitions. [2021-12-17 21:10:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 21:10:07,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:07,459 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 21:10:07,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:10:07,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:07,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:07,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1631747366, now seen corresponding path program 1 times [2021-12-17 21:10:07,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:07,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18988873] [2021-12-17 21:10:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:07,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:07,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:10:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:10:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:10:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:10:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:10:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:10:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:10:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:10:07,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 21:10:07,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:10:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:10:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:10:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:10:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:10:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 21:10:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-17 21:10:07,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-17 21:10:07,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:07,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18988873] [2021-12-17 21:10:07,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18988873] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:10:07,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548985775] [2021-12-17 21:10:07,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:07,568 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:10:07,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:10:07,584 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:10:07,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:10:07,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:07,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:10:07,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:10:08,033 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 21:10:08,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:10:08,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548985775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:08,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:10:08,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-17 21:10:08,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593934092] [2021-12-17 21:10:08,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:08,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:10:08,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:08,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:10:08,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:08,034 INFO L87 Difference]: Start difference. First operand 2484 states and 3197 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:10:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:08,125 INFO L93 Difference]: Finished difference Result 6410 states and 8026 transitions. [2021-12-17 21:10:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:10:08,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2021-12-17 21:10:08,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:08,138 INFO L225 Difference]: With dead ends: 6410 [2021-12-17 21:10:08,138 INFO L226 Difference]: Without dead ends: 4396 [2021-12-17 21:10:08,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:08,142 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 61 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:08,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1535 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:10:08,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2021-12-17 21:10:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 4354. [2021-12-17 21:10:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.2537790697674418) internal successors, (4313), 3492 states have internal predecessors, (4313), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2021-12-17 21:10:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5426 transitions. [2021-12-17 21:10:08,288 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5426 transitions. Word has length 163 [2021-12-17 21:10:08,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:08,288 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5426 transitions. [2021-12-17 21:10:08,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:10:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5426 transitions. [2021-12-17 21:10:08,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:08,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:08,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:08,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:10:08,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 21:10:08,508 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:08,508 INFO L85 PathProgramCache]: Analyzing trace with hash -370528825, now seen corresponding path program 1 times [2021-12-17 21:10:08,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:08,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552550336] [2021-12-17 21:10:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:08,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:08,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:08,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:08,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:08,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:08,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:08,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:08,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:08,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552550336] [2021-12-17 21:10:08,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552550336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:08,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:08,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:10:08,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547120301] [2021-12-17 21:10:08,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:08,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:10:08,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:08,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:10:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:10:08,619 INFO L87 Difference]: Start difference. First operand 4354 states and 5426 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 21:10:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:10,037 INFO L93 Difference]: Finished difference Result 4874 states and 6270 transitions. [2021-12-17 21:10:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:10,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:10,073 INFO L225 Difference]: With dead ends: 4874 [2021-12-17 21:10:10,073 INFO L226 Difference]: Without dead ends: 4496 [2021-12-17 21:10:10,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:10:10,076 INFO L933 BasicCegarLoop]: 811 mSDtfsCounter, 1154 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:10,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 1446 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:10:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2021-12-17 21:10:10,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 4354. [2021-12-17 21:10:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.2534883720930232) internal successors, (4312), 3492 states have internal predecessors, (4312), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2021-12-17 21:10:10,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5425 transitions. [2021-12-17 21:10:10,303 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5425 transitions. Word has length 179 [2021-12-17 21:10:10,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:10,303 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5425 transitions. [2021-12-17 21:10:10,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 21:10:10,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5425 transitions. [2021-12-17 21:10:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:10,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:10,306 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:10,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:10:10,307 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:10,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1019121595, now seen corresponding path program 1 times [2021-12-17 21:10:10,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:10,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057362210] [2021-12-17 21:10:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:10,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:10,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:10,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:10,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:10,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:10,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:10,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:10,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057362210] [2021-12-17 21:10:10,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057362210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:10,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:10,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:10:10,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114540706] [2021-12-17 21:10:10,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:10,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:10:10,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:10,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:10:10,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:10:10,445 INFO L87 Difference]: Start difference. First operand 4354 states and 5425 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 21:10:11,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:11,873 INFO L93 Difference]: Finished difference Result 4866 states and 6253 transitions. [2021-12-17 21:10:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:11,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:11,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:11,884 INFO L225 Difference]: With dead ends: 4866 [2021-12-17 21:10:11,884 INFO L226 Difference]: Without dead ends: 4496 [2021-12-17 21:10:11,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:10:11,886 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 1145 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:11,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1169 Valid, 1444 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:10:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2021-12-17 21:10:12,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 4354. [2021-12-17 21:10:12,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.2531976744186046) internal successors, (4311), 3492 states have internal predecessors, (4311), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2021-12-17 21:10:12,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5424 transitions. [2021-12-17 21:10:12,121 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5424 transitions. Word has length 179 [2021-12-17 21:10:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:12,121 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5424 transitions. [2021-12-17 21:10:12,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 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) [2021-12-17 21:10:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5424 transitions. [2021-12-17 21:10:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:12,123 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:12,124 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:12,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:10:12,124 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:12,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:12,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1517678397, now seen corresponding path program 1 times [2021-12-17 21:10:12,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:12,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981045657] [2021-12-17 21:10:12,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:12,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:12,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:12,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981045657] [2021-12-17 21:10:12,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981045657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:12,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:12,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:10:12,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792130724] [2021-12-17 21:10:12,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:12,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:10:12,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:12,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:10:12,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:10:12,247 INFO L87 Difference]: Start difference. First operand 4354 states and 5424 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-17 21:10:13,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:13,910 INFO L93 Difference]: Finished difference Result 4859 states and 6241 transitions. [2021-12-17 21:10:13,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:10:13,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:13,923 INFO L225 Difference]: With dead ends: 4859 [2021-12-17 21:10:13,923 INFO L226 Difference]: Without dead ends: 4495 [2021-12-17 21:10:13,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:10:13,925 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1265 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:13,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1297 Valid, 1621 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:10:13,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2021-12-17 21:10:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 4354. [2021-12-17 21:10:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.252906976744186) internal successors, (4310), 3492 states have internal predecessors, (4310), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2021-12-17 21:10:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5423 transitions. [2021-12-17 21:10:14,162 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5423 transitions. Word has length 179 [2021-12-17 21:10:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:14,162 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5423 transitions. [2021-12-17 21:10:14,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-17 21:10:14,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5423 transitions. [2021-12-17 21:10:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:14,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:14,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:14,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:10:14,164 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:14,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:14,165 INFO L85 PathProgramCache]: Analyzing trace with hash -536723583, now seen corresponding path program 1 times [2021-12-17 21:10:14,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:14,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597485186] [2021-12-17 21:10:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:14,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:14,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:14,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:14,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:14,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:14,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:14,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597485186] [2021-12-17 21:10:14,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597485186] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:14,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:14,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:14,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960437309] [2021-12-17 21:10:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:14,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:14,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:14,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:14,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:14,293 INFO L87 Difference]: Start difference. First operand 4354 states and 5423 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:15,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:15,857 INFO L93 Difference]: Finished difference Result 4884 states and 6288 transitions. [2021-12-17 21:10:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:15,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:15,866 INFO L225 Difference]: With dead ends: 4884 [2021-12-17 21:10:15,866 INFO L226 Difference]: Without dead ends: 4520 [2021-12-17 21:10:15,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:15,870 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 1362 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:15,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 1999 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:10:15,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4520 states. [2021-12-17 21:10:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4520 to 4354. [2021-12-17 21:10:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.2526162790697675) internal successors, (4309), 3492 states have internal predecessors, (4309), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2021-12-17 21:10:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5422 transitions. [2021-12-17 21:10:16,099 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5422 transitions. Word has length 179 [2021-12-17 21:10:16,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:16,099 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5422 transitions. [2021-12-17 21:10:16,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:16,100 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5422 transitions. [2021-12-17 21:10:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:16,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:16,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:16,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:10:16,102 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:16,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:16,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1147992641, now seen corresponding path program 1 times [2021-12-17 21:10:16,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:16,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289544005] [2021-12-17 21:10:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:16,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:16,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:16,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:16,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:16,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:16,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:16,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:16,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289544005] [2021-12-17 21:10:16,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289544005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:16,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:16,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:16,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758255601] [2021-12-17 21:10:16,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:16,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:16,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:16,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:16,201 INFO L87 Difference]: Start difference. First operand 4354 states and 5422 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:17,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:17,857 INFO L93 Difference]: Finished difference Result 4859 states and 6238 transitions. [2021-12-17 21:10:17,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 21:10:17,857 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:17,867 INFO L225 Difference]: With dead ends: 4859 [2021-12-17 21:10:17,867 INFO L226 Difference]: Without dead ends: 4495 [2021-12-17 21:10:17,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:10:17,869 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 1360 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 1490 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1392 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:17,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1392 Valid, 1946 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1490 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:10:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4495 states. [2021-12-17 21:10:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4495 to 4354. [2021-12-17 21:10:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.2517441860465117) internal successors, (4306), 3492 states have internal predecessors, (4306), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2021-12-17 21:10:18,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5419 transitions. [2021-12-17 21:10:18,096 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5419 transitions. Word has length 179 [2021-12-17 21:10:18,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:18,096 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5419 transitions. [2021-12-17 21:10:18,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5419 transitions. [2021-12-17 21:10:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:18,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:18,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:18,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:10:18,099 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:18,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash 844389699, now seen corresponding path program 1 times [2021-12-17 21:10:18,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:18,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610777624] [2021-12-17 21:10:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:18,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:18,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:18,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:18,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:18,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:18,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:18,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:18,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610777624] [2021-12-17 21:10:18,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610777624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:18,211 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:18,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:18,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783015704] [2021-12-17 21:10:18,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:18,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:18,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:18,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:18,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:18,212 INFO L87 Difference]: Start difference. First operand 4354 states and 5419 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:19,821 INFO L93 Difference]: Finished difference Result 4882 states and 6273 transitions. [2021-12-17 21:10:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:19,821 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:19,831 INFO L225 Difference]: With dead ends: 4882 [2021-12-17 21:10:19,831 INFO L226 Difference]: Without dead ends: 4518 [2021-12-17 21:10:19,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:19,833 INFO L933 BasicCegarLoop]: 783 mSDtfsCounter, 1354 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:19,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 1986 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:10:19,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-12-17 21:10:20,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 4354. [2021-12-17 21:10:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.251453488372093) internal successors, (4305), 3492 states have internal predecessors, (4305), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2021-12-17 21:10:20,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5418 transitions. [2021-12-17 21:10:20,048 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5418 transitions. Word has length 179 [2021-12-17 21:10:20,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:20,048 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5418 transitions. [2021-12-17 21:10:20,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:20,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5418 transitions. [2021-12-17 21:10:20,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:20,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:20,051 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:20,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:10:20,051 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1556243711, now seen corresponding path program 1 times [2021-12-17 21:10:20,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:20,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610529396] [2021-12-17 21:10:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:20,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:20,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:20,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:20,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:20,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:20,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:20,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610529396] [2021-12-17 21:10:20,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610529396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:20,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:20,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:20,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941765438] [2021-12-17 21:10:20,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:20,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:20,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:20,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:20,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:20,189 INFO L87 Difference]: Start difference. First operand 4354 states and 5418 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:21,782 INFO L93 Difference]: Finished difference Result 4881 states and 6268 transitions. [2021-12-17 21:10:21,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:21,782 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:21,791 INFO L225 Difference]: With dead ends: 4881 [2021-12-17 21:10:21,791 INFO L226 Difference]: Without dead ends: 4517 [2021-12-17 21:10:21,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:21,793 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 1434 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1526 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:21,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1466 Valid, 1937 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1526 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:10:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-12-17 21:10:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 4354. [2021-12-17 21:10:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 3440 states have (on average 1.2511627906976743) internal successors, (4304), 3492 states have internal predecessors, (4304), 476 states have call successors, (476), 330 states have call predecessors, (476), 436 states have return successors, (637), 533 states have call predecessors, (637), 472 states have call successors, (637) [2021-12-17 21:10:22,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 5417 transitions. [2021-12-17 21:10:22,033 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 5417 transitions. Word has length 179 [2021-12-17 21:10:22,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:22,033 INFO L470 AbstractCegarLoop]: Abstraction has 4354 states and 5417 transitions. [2021-12-17 21:10:22,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:22,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 5417 transitions. [2021-12-17 21:10:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:22,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:22,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:22,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:10:22,035 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:22,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -109662845, now seen corresponding path program 1 times [2021-12-17 21:10:22,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:22,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498890827] [2021-12-17 21:10:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:22,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:22,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:22,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:22,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:22,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:22,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:22,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:22,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498890827] [2021-12-17 21:10:22,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498890827] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:22,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:22,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:10:22,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398180781] [2021-12-17 21:10:22,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:22,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:10:22,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:10:22,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:10:22,171 INFO L87 Difference]: Start difference. First operand 4354 states and 5417 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:10:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:24,957 INFO L93 Difference]: Finished difference Result 5404 states and 7100 transitions. [2021-12-17 21:10:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:10:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:24,969 INFO L225 Difference]: With dead ends: 5404 [2021-12-17 21:10:24,969 INFO L226 Difference]: Without dead ends: 5040 [2021-12-17 21:10:24,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:10:24,971 INFO L933 BasicCegarLoop]: 1133 mSDtfsCounter, 2317 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 2999 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2349 SdHoareTripleChecker+Valid, 3694 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:24,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2349 Valid, 3694 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2999 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:10:24,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-12-17 21:10:25,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 4733. [2021-12-17 21:10:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4733 states, 3790 states have (on average 1.2812664907651714) internal successors, (4856), 3843 states have internal predecessors, (4856), 498 states have call successors, (498), 336 states have call predecessors, (498), 443 states have return successors, (662), 556 states have call predecessors, (662), 494 states have call successors, (662) [2021-12-17 21:10:25,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4733 states to 4733 states and 6016 transitions. [2021-12-17 21:10:25,192 INFO L78 Accepts]: Start accepts. Automaton has 4733 states and 6016 transitions. Word has length 179 [2021-12-17 21:10:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:25,192 INFO L470 AbstractCegarLoop]: Abstraction has 4733 states and 6016 transitions. [2021-12-17 21:10:25,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:10:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4733 states and 6016 transitions. [2021-12-17 21:10:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:25,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:25,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:25,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:10:25,194 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:25,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:25,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1032830271, now seen corresponding path program 1 times [2021-12-17 21:10:25,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149591103] [2021-12-17 21:10:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:25,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:25,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:25,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:25,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:25,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:25,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:25,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149591103] [2021-12-17 21:10:25,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149591103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:25,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:25,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:25,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464710707] [2021-12-17 21:10:25,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:25,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:25,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:25,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:25,308 INFO L87 Difference]: Start difference. First operand 4733 states and 6016 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:27,076 INFO L93 Difference]: Finished difference Result 5818 states and 7772 transitions. [2021-12-17 21:10:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:27,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:27,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:27,087 INFO L225 Difference]: With dead ends: 5818 [2021-12-17 21:10:27,087 INFO L226 Difference]: Without dead ends: 5075 [2021-12-17 21:10:27,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:27,090 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 1351 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1974 SdHoareTripleChecker+Invalid, 1714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:27,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1383 Valid, 1974 Invalid, 1714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1593 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:10:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-12-17 21:10:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4733. [2021-12-17 21:10:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4733 states, 3790 states have (on average 1.2807387862796833) internal successors, (4854), 3843 states have internal predecessors, (4854), 498 states have call successors, (498), 336 states have call predecessors, (498), 443 states have return successors, (662), 556 states have call predecessors, (662), 494 states have call successors, (662) [2021-12-17 21:10:27,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4733 states to 4733 states and 6014 transitions. [2021-12-17 21:10:27,364 INFO L78 Accepts]: Start accepts. Automaton has 4733 states and 6014 transitions. Word has length 179 [2021-12-17 21:10:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:27,365 INFO L470 AbstractCegarLoop]: Abstraction has 4733 states and 6014 transitions. [2021-12-17 21:10:27,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:27,365 INFO L276 IsEmpty]: Start isEmpty. Operand 4733 states and 6014 transitions. [2021-12-17 21:10:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:27,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:27,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:27,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:10:27,367 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:27,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash -646967869, now seen corresponding path program 1 times [2021-12-17 21:10:27,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:27,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23136976] [2021-12-17 21:10:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:27,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:27,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:27,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:27,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:27,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:27,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:27,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:27,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23136976] [2021-12-17 21:10:27,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23136976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:27,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:27,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:27,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799366180] [2021-12-17 21:10:27,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:27,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:27,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:27,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:27,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:27,496 INFO L87 Difference]: Start difference. First operand 4733 states and 6014 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:29,016 INFO L93 Difference]: Finished difference Result 5815 states and 7760 transitions. [2021-12-17 21:10:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:29,027 INFO L225 Difference]: With dead ends: 5815 [2021-12-17 21:10:29,027 INFO L226 Difference]: Without dead ends: 5072 [2021-12-17 21:10:29,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:29,030 INFO L933 BasicCegarLoop]: 765 mSDtfsCounter, 1573 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1605 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:29,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1605 Valid, 1706 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:10:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-12-17 21:10:29,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4733. [2021-12-17 21:10:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4733 states, 3790 states have (on average 1.2802110817941952) internal successors, (4852), 3843 states have internal predecessors, (4852), 498 states have call successors, (498), 336 states have call predecessors, (498), 443 states have return successors, (662), 556 states have call predecessors, (662), 494 states have call successors, (662) [2021-12-17 21:10:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4733 states to 4733 states and 6012 transitions. [2021-12-17 21:10:29,323 INFO L78 Accepts]: Start accepts. Automaton has 4733 states and 6012 transitions. Word has length 179 [2021-12-17 21:10:29,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:29,323 INFO L470 AbstractCegarLoop]: Abstraction has 4733 states and 6012 transitions. [2021-12-17 21:10:29,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4733 states and 6012 transitions. [2021-12-17 21:10:29,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:29,325 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:29,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:29,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:10:29,325 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash -911615359, now seen corresponding path program 1 times [2021-12-17 21:10:29,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:29,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82894227] [2021-12-17 21:10:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:29,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:29,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:29,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:29,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:29,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:29,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:29,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:29,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82894227] [2021-12-17 21:10:29,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82894227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:29,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:29,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:10:29,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155709884] [2021-12-17 21:10:29,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:29,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:10:29,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:29,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:10:29,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:10:29,447 INFO L87 Difference]: Start difference. First operand 4733 states and 6012 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:10:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:32,400 INFO L93 Difference]: Finished difference Result 6866 states and 9430 transitions. [2021-12-17 21:10:32,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:10:32,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:32,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:32,413 INFO L225 Difference]: With dead ends: 6866 [2021-12-17 21:10:32,413 INFO L226 Difference]: Without dead ends: 6123 [2021-12-17 21:10:32,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:10:32,416 INFO L933 BasicCegarLoop]: 1108 mSDtfsCounter, 1931 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 3246 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1963 SdHoareTripleChecker+Valid, 4104 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 3246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:32,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1963 Valid, 4104 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 3246 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:10:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6123 states. [2021-12-17 21:10:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6123 to 5521. [2021-12-17 21:10:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5521 states, 4518 states have (on average 1.32912793271359) internal successors, (6005), 4575 states have internal predecessors, (6005), 542 states have call successors, (542), 348 states have call predecessors, (542), 459 states have return successors, (718), 602 states have call predecessors, (718), 538 states have call successors, (718) [2021-12-17 21:10:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 7265 transitions. [2021-12-17 21:10:32,675 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 7265 transitions. Word has length 179 [2021-12-17 21:10:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:32,675 INFO L470 AbstractCegarLoop]: Abstraction has 5521 states and 7265 transitions. [2021-12-17 21:10:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:10:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 7265 transitions. [2021-12-17 21:10:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:32,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:32,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:32,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:10:32,678 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2060172991, now seen corresponding path program 1 times [2021-12-17 21:10:32,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:32,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656405761] [2021-12-17 21:10:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:32,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:32,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:32,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:32,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:32,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:32,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656405761] [2021-12-17 21:10:32,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656405761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:32,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:32,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:32,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794842832] [2021-12-17 21:10:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:32,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:32,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:32,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:32,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:32,772 INFO L87 Difference]: Start difference. First operand 5521 states and 7265 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:34,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:34,623 INFO L93 Difference]: Finished difference Result 7760 states and 10895 transitions. [2021-12-17 21:10:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:34,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:34,636 INFO L225 Difference]: With dead ends: 7760 [2021-12-17 21:10:34,636 INFO L226 Difference]: Without dead ends: 6229 [2021-12-17 21:10:34,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:34,641 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 1349 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1381 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:34,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1381 Valid, 1959 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:10:34,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6229 states. [2021-12-17 21:10:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6229 to 5521. [2021-12-17 21:10:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5521 states, 4518 states have (on average 1.3282425852146968) internal successors, (6001), 4575 states have internal predecessors, (6001), 542 states have call successors, (542), 348 states have call predecessors, (542), 459 states have return successors, (718), 602 states have call predecessors, (718), 538 states have call successors, (718) [2021-12-17 21:10:34,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 7261 transitions. [2021-12-17 21:10:34,926 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 7261 transitions. Word has length 179 [2021-12-17 21:10:34,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:34,926 INFO L470 AbstractCegarLoop]: Abstraction has 5521 states and 7261 transitions. [2021-12-17 21:10:34,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:34,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 7261 transitions. [2021-12-17 21:10:34,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:34,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:34,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:34,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 21:10:34,929 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:34,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:34,929 INFO L85 PathProgramCache]: Analyzing trace with hash -337814847, now seen corresponding path program 1 times [2021-12-17 21:10:34,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:34,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712126219] [2021-12-17 21:10:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:34,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:34,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:34,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:35,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:35,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:35,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:35,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:35,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712126219] [2021-12-17 21:10:35,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712126219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:35,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:35,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:35,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813857582] [2021-12-17 21:10:35,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:35,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:35,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:35,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:35,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:35,043 INFO L87 Difference]: Start difference. First operand 5521 states and 7261 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:36,794 INFO L93 Difference]: Finished difference Result 7751 states and 10865 transitions. [2021-12-17 21:10:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:36,806 INFO L225 Difference]: With dead ends: 7751 [2021-12-17 21:10:36,806 INFO L226 Difference]: Without dead ends: 6220 [2021-12-17 21:10:36,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:36,810 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1347 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 1955 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:36,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1379 Valid, 1955 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:10:36,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6220 states. [2021-12-17 21:10:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6220 to 5521. [2021-12-17 21:10:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5521 states, 4518 states have (on average 1.3273572377158034) internal successors, (5997), 4575 states have internal predecessors, (5997), 542 states have call successors, (542), 348 states have call predecessors, (542), 459 states have return successors, (718), 602 states have call predecessors, (718), 538 states have call successors, (718) [2021-12-17 21:10:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5521 states to 5521 states and 7257 transitions. [2021-12-17 21:10:37,115 INFO L78 Accepts]: Start accepts. Automaton has 5521 states and 7257 transitions. Word has length 179 [2021-12-17 21:10:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:37,116 INFO L470 AbstractCegarLoop]: Abstraction has 5521 states and 7257 transitions. [2021-12-17 21:10:37,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:37,116 INFO L276 IsEmpty]: Start isEmpty. Operand 5521 states and 7257 transitions. [2021-12-17 21:10:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:37,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:37,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:37,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 21:10:37,118 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash 472703, now seen corresponding path program 1 times [2021-12-17 21:10:37,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:37,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222050780] [2021-12-17 21:10:37,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:37,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:37,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:37,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:37,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:37,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:37,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:37,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:37,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:37,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222050780] [2021-12-17 21:10:37,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222050780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:37,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:37,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:10:37,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549274574] [2021-12-17 21:10:37,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:37,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:10:37,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:37,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:10:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:10:37,234 INFO L87 Difference]: Start difference. First operand 5521 states and 7257 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:10:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:40,857 INFO L93 Difference]: Finished difference Result 10599 states and 15371 transitions. [2021-12-17 21:10:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:10:40,858 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:40,876 INFO L225 Difference]: With dead ends: 10599 [2021-12-17 21:10:40,876 INFO L226 Difference]: Without dead ends: 9068 [2021-12-17 21:10:40,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:10:40,884 INFO L933 BasicCegarLoop]: 1008 mSDtfsCounter, 2127 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 3455 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2158 SdHoareTripleChecker+Valid, 2970 SdHoareTripleChecker+Invalid, 3639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:40,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2158 Valid, 2970 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3455 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 21:10:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9068 states. [2021-12-17 21:10:41,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9068 to 7160. [2021-12-17 21:10:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 6035 states have (on average 1.3946975973487987) internal successors, (8417), 6106 states have internal predecessors, (8417), 626 states have call successors, (626), 372 states have call predecessors, (626), 497 states have return successors, (850), 690 states have call predecessors, (850), 622 states have call successors, (850) [2021-12-17 21:10:41,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 9893 transitions. [2021-12-17 21:10:41,277 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 9893 transitions. Word has length 179 [2021-12-17 21:10:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:41,277 INFO L470 AbstractCegarLoop]: Abstraction has 7160 states and 9893 transitions. [2021-12-17 21:10:41,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:10:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 9893 transitions. [2021-12-17 21:10:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:41,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:41,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:41,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 21:10:41,280 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:41,281 INFO L85 PathProgramCache]: Analyzing trace with hash 427027201, now seen corresponding path program 1 times [2021-12-17 21:10:41,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:41,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860012399] [2021-12-17 21:10:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:41,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:41,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:41,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:41,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:41,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:41,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:41,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:41,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:41,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860012399] [2021-12-17 21:10:41,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860012399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:41,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:41,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:41,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115545378] [2021-12-17 21:10:41,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:41,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:41,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:41,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:41,379 INFO L87 Difference]: Start difference. First operand 7160 states and 9893 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:43,264 INFO L93 Difference]: Finished difference Result 11809 states and 17471 transitions. [2021-12-17 21:10:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:43,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:43,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:43,280 INFO L225 Difference]: With dead ends: 11809 [2021-12-17 21:10:43,281 INFO L226 Difference]: Without dead ends: 8639 [2021-12-17 21:10:43,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:43,288 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 1344 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1376 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:43,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1376 Valid, 1946 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:10:43,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8639 states. [2021-12-17 21:10:43,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8639 to 7160. [2021-12-17 21:10:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 6035 states have (on average 1.3933719966859983) internal successors, (8409), 6106 states have internal predecessors, (8409), 626 states have call successors, (626), 372 states have call predecessors, (626), 497 states have return successors, (850), 690 states have call predecessors, (850), 622 states have call successors, (850) [2021-12-17 21:10:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 9885 transitions. [2021-12-17 21:10:43,722 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 9885 transitions. Word has length 179 [2021-12-17 21:10:43,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:43,722 INFO L470 AbstractCegarLoop]: Abstraction has 7160 states and 9885 transitions. [2021-12-17 21:10:43,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 9885 transitions. [2021-12-17 21:10:43,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:43,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:43,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:43,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 21:10:43,730 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:43,730 INFO L85 PathProgramCache]: Analyzing trace with hash -113402305, now seen corresponding path program 1 times [2021-12-17 21:10:43,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:43,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386990424] [2021-12-17 21:10:43,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:43,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:43,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:43,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:43,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:43,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:43,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:43,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:43,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:43,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386990424] [2021-12-17 21:10:43,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386990424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:43,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:43,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:43,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14281410] [2021-12-17 21:10:43,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:43,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:43,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:43,841 INFO L87 Difference]: Start difference. First operand 7160 states and 9885 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:45,306 INFO L93 Difference]: Finished difference Result 11782 states and 17393 transitions. [2021-12-17 21:10:45,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:45,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:45,323 INFO L225 Difference]: With dead ends: 11782 [2021-12-17 21:10:45,324 INFO L226 Difference]: Without dead ends: 8612 [2021-12-17 21:10:45,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:45,333 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 1563 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:45,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1595 Valid, 1680 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:10:45,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8612 states. [2021-12-17 21:10:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8612 to 7160. [2021-12-17 21:10:45,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 6035 states have (on average 1.392046396023198) internal successors, (8401), 6106 states have internal predecessors, (8401), 626 states have call successors, (626), 372 states have call predecessors, (626), 497 states have return successors, (850), 690 states have call predecessors, (850), 622 states have call successors, (850) [2021-12-17 21:10:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 9877 transitions. [2021-12-17 21:10:45,755 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 9877 transitions. Word has length 179 [2021-12-17 21:10:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:45,755 INFO L470 AbstractCegarLoop]: Abstraction has 7160 states and 9877 transitions. [2021-12-17 21:10:45,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 9877 transitions. [2021-12-17 21:10:45,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:45,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:45,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:45,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 21:10:45,758 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash -269382847, now seen corresponding path program 1 times [2021-12-17 21:10:45,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:45,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670924605] [2021-12-17 21:10:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:45,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:45,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:45,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:45,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:45,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:45,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:45,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:45,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670924605] [2021-12-17 21:10:45,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670924605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:45,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:45,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:45,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139367843] [2021-12-17 21:10:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:45,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:45,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:45,872 INFO L87 Difference]: Start difference. First operand 7160 states and 9877 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:47,488 INFO L93 Difference]: Finished difference Result 11755 states and 17315 transitions. [2021-12-17 21:10:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:47,488 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:47,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:47,502 INFO L225 Difference]: With dead ends: 11755 [2021-12-17 21:10:47,503 INFO L226 Difference]: Without dead ends: 8585 [2021-12-17 21:10:47,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:47,511 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 1564 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1596 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:47,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1596 Valid, 1674 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:10:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8585 states. [2021-12-17 21:10:47,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8585 to 7160. [2021-12-17 21:10:47,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 6035 states have (on average 1.3907207953603977) internal successors, (8393), 6106 states have internal predecessors, (8393), 626 states have call successors, (626), 372 states have call predecessors, (626), 497 states have return successors, (850), 690 states have call predecessors, (850), 622 states have call successors, (850) [2021-12-17 21:10:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 9869 transitions. [2021-12-17 21:10:47,895 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 9869 transitions. Word has length 179 [2021-12-17 21:10:47,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:47,895 INFO L470 AbstractCegarLoop]: Abstraction has 7160 states and 9869 transitions. [2021-12-17 21:10:47,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 9869 transitions. [2021-12-17 21:10:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:47,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:47,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:47,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 21:10:47,898 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:47,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:47,898 INFO L85 PathProgramCache]: Analyzing trace with hash 141227519, now seen corresponding path program 1 times [2021-12-17 21:10:47,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:47,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402593421] [2021-12-17 21:10:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:47,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:47,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:47,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:47,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:47,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:47,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:47,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:47,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402593421] [2021-12-17 21:10:47,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402593421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:47,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:47,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:10:47,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776149152] [2021-12-17 21:10:47,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:47,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:10:47,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:47,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:10:47,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:10:47,999 INFO L87 Difference]: Start difference. First operand 7160 states and 9869 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:10:51,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:51,364 INFO L93 Difference]: Finished difference Result 16949 states and 25607 transitions. [2021-12-17 21:10:51,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:10:51,364 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:51,393 INFO L225 Difference]: With dead ends: 16949 [2021-12-17 21:10:51,394 INFO L226 Difference]: Without dead ends: 13779 [2021-12-17 21:10:51,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:10:51,404 INFO L933 BasicCegarLoop]: 1186 mSDtfsCounter, 1955 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 3510 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1986 SdHoareTripleChecker+Valid, 4170 SdHoareTripleChecker+Invalid, 3649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 3510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:51,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1986 Valid, 4170 Invalid, 3649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 3510 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:10:51,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13779 states. [2021-12-17 21:10:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13779 to 10543. [2021-12-17 21:10:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10543 states, 9160 states have (on average 1.4603711790393012) internal successors, (13377), 9277 states have internal predecessors, (13377), 790 states have call successors, (790), 420 states have call predecessors, (790), 591 states have return successors, (1206), 862 states have call predecessors, (1206), 786 states have call successors, (1206) [2021-12-17 21:10:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10543 states to 10543 states and 15373 transitions. [2021-12-17 21:10:52,066 INFO L78 Accepts]: Start accepts. Automaton has 10543 states and 15373 transitions. Word has length 179 [2021-12-17 21:10:52,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:52,066 INFO L470 AbstractCegarLoop]: Abstraction has 10543 states and 15373 transitions. [2021-12-17 21:10:52,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:10:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 10543 states and 15373 transitions. [2021-12-17 21:10:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:52,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:52,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:52,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 21:10:52,070 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:52,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1994655683, now seen corresponding path program 1 times [2021-12-17 21:10:52,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:52,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515548825] [2021-12-17 21:10:52,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:52,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:52,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:52,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:52,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:52,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:52,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:52,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:52,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:52,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:52,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515548825] [2021-12-17 21:10:52,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515548825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:52,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:52,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:52,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639457249] [2021-12-17 21:10:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:52,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:52,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:52,182 INFO L87 Difference]: Start difference. First operand 10543 states and 15373 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:53,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:53,897 INFO L93 Difference]: Finished difference Result 20000 states and 30839 transitions. [2021-12-17 21:10:53,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:53,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:53,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:53,924 INFO L225 Difference]: With dead ends: 20000 [2021-12-17 21:10:53,924 INFO L226 Difference]: Without dead ends: 13447 [2021-12-17 21:10:53,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:53,951 INFO L933 BasicCegarLoop]: 726 mSDtfsCounter, 1561 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:53,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1665 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:10:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13447 states. [2021-12-17 21:10:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13447 to 10543. [2021-12-17 21:10:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10543 states, 9160 states have (on average 1.4586244541484716) internal successors, (13361), 9277 states have internal predecessors, (13361), 790 states have call successors, (790), 420 states have call predecessors, (790), 591 states have return successors, (1206), 862 states have call predecessors, (1206), 786 states have call successors, (1206) [2021-12-17 21:10:54,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10543 states to 10543 states and 15357 transitions. [2021-12-17 21:10:54,566 INFO L78 Accepts]: Start accepts. Automaton has 10543 states and 15357 transitions. Word has length 179 [2021-12-17 21:10:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:54,566 INFO L470 AbstractCegarLoop]: Abstraction has 10543 states and 15357 transitions. [2021-12-17 21:10:54,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 10543 states and 15357 transitions. [2021-12-17 21:10:54,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:54,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:54,569 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:54,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 21:10:54,569 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:54,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1925007809, now seen corresponding path program 1 times [2021-12-17 21:10:54,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:54,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056526002] [2021-12-17 21:10:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:54,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:54,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:54,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:54,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:54,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:54,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:54,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056526002] [2021-12-17 21:10:54,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056526002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:54,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:54,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:54,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594047070] [2021-12-17 21:10:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:54,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:54,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:54,682 INFO L87 Difference]: Start difference. First operand 10543 states and 15357 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:56,558 INFO L93 Difference]: Finished difference Result 19919 states and 30629 transitions. [2021-12-17 21:10:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:56,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:56,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:56,592 INFO L225 Difference]: With dead ends: 19919 [2021-12-17 21:10:56,592 INFO L226 Difference]: Without dead ends: 13366 [2021-12-17 21:10:56,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:56,608 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 1559 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:56,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 1661 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:10:56,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13366 states. [2021-12-17 21:10:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13366 to 10543. [2021-12-17 21:10:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10543 states, 9160 states have (on average 1.456877729257642) internal successors, (13345), 9277 states have internal predecessors, (13345), 790 states have call successors, (790), 420 states have call predecessors, (790), 591 states have return successors, (1206), 862 states have call predecessors, (1206), 786 states have call successors, (1206) [2021-12-17 21:10:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10543 states to 10543 states and 15341 transitions. [2021-12-17 21:10:57,299 INFO L78 Accepts]: Start accepts. Automaton has 10543 states and 15341 transitions. Word has length 179 [2021-12-17 21:10:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:57,300 INFO L470 AbstractCegarLoop]: Abstraction has 10543 states and 15341 transitions. [2021-12-17 21:10:57,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 10543 states and 15341 transitions. [2021-12-17 21:10:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:10:57,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:57,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:10:57,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 21:10:57,303 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:57,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:57,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1507119107, now seen corresponding path program 1 times [2021-12-17 21:10:57,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:57,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278174239] [2021-12-17 21:10:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:57,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:57,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:57,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:10:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:57,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:10:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:57,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:10:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:57,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:10:57,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:57,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:57,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:57,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278174239] [2021-12-17 21:10:57,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278174239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:57,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:57,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:57,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247837218] [2021-12-17 21:10:57,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:57,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:57,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:57,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:57,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:57,434 INFO L87 Difference]: Start difference. First operand 10543 states and 15341 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:10:59,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:59,484 INFO L93 Difference]: Finished difference Result 19838 states and 30419 transitions. [2021-12-17 21:10:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:59,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:10:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:59,536 INFO L225 Difference]: With dead ends: 19838 [2021-12-17 21:10:59,536 INFO L226 Difference]: Without dead ends: 13285 [2021-12-17 21:10:59,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:10:59,554 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 1354 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:59,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 1906 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:10:59,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13285 states. [2021-12-17 21:11:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13285 to 10543. [2021-12-17 21:11:00,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10543 states, 9160 states have (on average 1.4551310043668122) internal successors, (13329), 9277 states have internal predecessors, (13329), 790 states have call successors, (790), 420 states have call predecessors, (790), 591 states have return successors, (1206), 862 states have call predecessors, (1206), 786 states have call successors, (1206) [2021-12-17 21:11:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10543 states to 10543 states and 15325 transitions. [2021-12-17 21:11:00,369 INFO L78 Accepts]: Start accepts. Automaton has 10543 states and 15325 transitions. Word has length 179 [2021-12-17 21:11:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:11:00,369 INFO L470 AbstractCegarLoop]: Abstraction has 10543 states and 15325 transitions. [2021-12-17 21:11:00,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:11:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 10543 states and 15325 transitions. [2021-12-17 21:11:00,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:11:00,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:11:00,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:11:00,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 21:11:00,372 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:11:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:11:00,373 INFO L85 PathProgramCache]: Analyzing trace with hash -108165505, now seen corresponding path program 1 times [2021-12-17 21:11:00,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:11:00,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186138602] [2021-12-17 21:11:00,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:11:00,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:11:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:00,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:11:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:00,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:11:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:00,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:11:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:00,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:11:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:00,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:11:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:11:00,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:11:00,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186138602] [2021-12-17 21:11:00,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186138602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:11:00,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:11:00,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:11:00,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840828146] [2021-12-17 21:11:00,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:11:00,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:11:00,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:11:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:11:00,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:11:00,485 INFO L87 Difference]: Start difference. First operand 10543 states and 15325 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:11:04,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:11:04,828 INFO L93 Difference]: Finished difference Result 29508 states and 46137 transitions. [2021-12-17 21:11:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:11:04,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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 179 [2021-12-17 21:11:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:11:04,870 INFO L225 Difference]: With dead ends: 29508 [2021-12-17 21:11:04,870 INFO L226 Difference]: Without dead ends: 22955 [2021-12-17 21:11:04,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:11:04,885 INFO L933 BasicCegarLoop]: 1100 mSDtfsCounter, 1887 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 3278 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1918 SdHoareTripleChecker+Valid, 4084 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 3278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:11:04,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1918 Valid, 4084 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 3278 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 21:11:04,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22955 states. [2021-12-17 21:11:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22955 to 17447. [2021-12-17 21:11:06,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17447 states, 15502 states have (on average 1.5086440459295576) internal successors, (23387), 15765 states have internal predecessors, (23387), 1110 states have call successors, (1110), 516 states have call predecessors, (1110), 833 states have return successors, (2294), 1198 states have call predecessors, (2294), 1106 states have call successors, (2294) [2021-12-17 21:11:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17447 states to 17447 states and 26791 transitions. [2021-12-17 21:11:06,055 INFO L78 Accepts]: Start accepts. Automaton has 17447 states and 26791 transitions. Word has length 179 [2021-12-17 21:11:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:11:06,055 INFO L470 AbstractCegarLoop]: Abstraction has 17447 states and 26791 transitions. [2021-12-17 21:11:06,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:11:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 17447 states and 26791 transitions. [2021-12-17 21:11:06,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:11:06,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:11:06,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:11:06,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 21:11:06,060 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:11:06,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:11:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1725605955, now seen corresponding path program 1 times [2021-12-17 21:11:06,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:11:06,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92121849] [2021-12-17 21:11:06,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:11:06,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:11:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:06,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:11:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:06,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:11:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:06,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:11:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:06,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:11:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:06,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:11:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:11:06,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:11:06,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92121849] [2021-12-17 21:11:06,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92121849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:11:06,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:11:06,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:11:06,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531141258] [2021-12-17 21:11:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:11:06,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:11:06,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:11:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:11:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:11:06,195 INFO L87 Difference]: Start difference. First operand 17447 states and 26791 transitions. Second operand has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:11:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:11:11,702 INFO L93 Difference]: Finished difference Result 55763 states and 90703 transitions. [2021-12-17 21:11:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:11:11,702 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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 179 [2021-12-17 21:11:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:11:11,811 INFO L225 Difference]: With dead ends: 55763 [2021-12-17 21:11:11,812 INFO L226 Difference]: Without dead ends: 42306 [2021-12-17 21:11:11,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:11:11,848 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 1946 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 4020 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:11:11,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 4020 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:11:11,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42306 states. [2021-12-17 21:11:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42306 to 31774. [2021-12-17 21:11:14,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31774 states, 28559 states have (on average 1.5442767603907699) internal successors, (44103), 29276 states have internal predecessors, (44103), 1734 states have call successors, (1734), 708 states have call predecessors, (1734), 1479 states have return successors, (5990), 1854 states have call predecessors, (5990), 1730 states have call successors, (5990) [2021-12-17 21:11:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31774 states to 31774 states and 51827 transitions. [2021-12-17 21:11:14,371 INFO L78 Accepts]: Start accepts. Automaton has 31774 states and 51827 transitions. Word has length 179 [2021-12-17 21:11:14,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:11:14,372 INFO L470 AbstractCegarLoop]: Abstraction has 31774 states and 51827 transitions. [2021-12-17 21:11:14,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.0) internal successors, (168), 6 states have internal predecessors, (168), 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) [2021-12-17 21:11:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 31774 states and 51827 transitions. [2021-12-17 21:11:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:11:14,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:11:14,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:11:14,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 21:11:14,380 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:11:14,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:11:14,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1362139457, now seen corresponding path program 1 times [2021-12-17 21:11:14,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:11:14,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529886364] [2021-12-17 21:11:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:11:14,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:11:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:14,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:11:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:11:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:14,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:11:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:14,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:11:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:14,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:11:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:14,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:11:14,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:11:14,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529886364] [2021-12-17 21:11:14,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529886364] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:11:14,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:11:14,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:11:14,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502028671] [2021-12-17 21:11:14,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:11:14,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:11:14,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:11:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:11:14,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:11:14,535 INFO L87 Difference]: Start difference. First operand 31774 states and 51827 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:11:18,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:11:18,684 INFO L93 Difference]: Finished difference Result 70769 states and 119297 transitions. [2021-12-17 21:11:18,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:11:18,685 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:11:18,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:11:18,799 INFO L225 Difference]: With dead ends: 70769 [2021-12-17 21:11:18,799 INFO L226 Difference]: Without dead ends: 42985 [2021-12-17 21:11:18,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:11:18,850 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 1560 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:11:18,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 1646 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:11:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42985 states. [2021-12-17 21:11:21,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42985 to 31774. [2021-12-17 21:11:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31774 states, 28559 states have (on average 1.5420357855667215) internal successors, (44039), 29276 states have internal predecessors, (44039), 1734 states have call successors, (1734), 708 states have call predecessors, (1734), 1479 states have return successors, (5990), 1854 states have call predecessors, (5990), 1730 states have call successors, (5990) [2021-12-17 21:11:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31774 states to 31774 states and 51763 transitions. [2021-12-17 21:11:21,444 INFO L78 Accepts]: Start accepts. Automaton has 31774 states and 51763 transitions. Word has length 179 [2021-12-17 21:11:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:11:21,445 INFO L470 AbstractCegarLoop]: Abstraction has 31774 states and 51763 transitions. [2021-12-17 21:11:21,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:11:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 31774 states and 51763 transitions. [2021-12-17 21:11:21,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:11:21,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:11:21,453 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:11:21,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 21:11:21,454 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:11:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:11:21,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1073320067, now seen corresponding path program 1 times [2021-12-17 21:11:21,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:11:21,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140878514] [2021-12-17 21:11:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:11:21,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:11:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:21,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:11:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:21,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:11:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:21,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:11:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:21,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:11:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:21,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:11:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:11:21,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:11:21,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140878514] [2021-12-17 21:11:21,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140878514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:11:21,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:11:21,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:11:21,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908085788] [2021-12-17 21:11:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:11:21,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:11:21,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:11:21,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:11:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:11:21,564 INFO L87 Difference]: Start difference. First operand 31774 states and 51763 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:11:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:11:30,075 INFO L93 Difference]: Finished difference Result 84389 states and 136375 transitions. [2021-12-17 21:11:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:11:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:11:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:11:30,208 INFO L225 Difference]: With dead ends: 84389 [2021-12-17 21:11:30,209 INFO L226 Difference]: Without dead ends: 56606 [2021-12-17 21:11:30,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:11:30,267 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 1315 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 2230 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1315 SdHoareTripleChecker+Valid, 2619 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:11:30,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1315 Valid, 2619 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2230 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:11:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56606 states. [2021-12-17 21:11:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56606 to 31966. [2021-12-17 21:11:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31966 states, 28751 states have (on average 1.5384160550937358) internal successors, (44231), 29468 states have internal predecessors, (44231), 1734 states have call successors, (1734), 708 states have call predecessors, (1734), 1479 states have return successors, (5990), 1854 states have call predecessors, (5990), 1730 states have call successors, (5990) [2021-12-17 21:11:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31966 states to 31966 states and 51955 transitions. [2021-12-17 21:11:32,791 INFO L78 Accepts]: Start accepts. Automaton has 31966 states and 51955 transitions. Word has length 179 [2021-12-17 21:11:32,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:11:32,792 INFO L470 AbstractCegarLoop]: Abstraction has 31966 states and 51955 transitions. [2021-12-17 21:11:32,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:11:32,792 INFO L276 IsEmpty]: Start isEmpty. Operand 31966 states and 51955 transitions. [2021-12-17 21:11:32,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:11:32,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:11:32,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:11:32,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 21:11:32,801 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:11:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:11:32,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1171238331, now seen corresponding path program 1 times [2021-12-17 21:11:32,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:11:32,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726127017] [2021-12-17 21:11:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:11:32,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:11:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:32,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:11:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:32,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:11:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:32,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:11:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:32,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:11:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:32,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:11:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:11:32,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:11:32,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726127017] [2021-12-17 21:11:32,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726127017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:11:32,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:11:32,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:11:32,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80098024] [2021-12-17 21:11:32,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:11:32,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:11:32,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:11:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:11:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:11:32,914 INFO L87 Difference]: Start difference. First operand 31966 states and 51955 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-17 21:11:41,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:11:41,632 INFO L93 Difference]: Finished difference Result 105579 states and 174320 transitions. [2021-12-17 21:11:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:11:41,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 179 [2021-12-17 21:11:41,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:11:41,843 INFO L225 Difference]: With dead ends: 105579 [2021-12-17 21:11:41,843 INFO L226 Difference]: Without dead ends: 77604 [2021-12-17 21:11:41,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:11:41,923 INFO L933 BasicCegarLoop]: 1331 mSDtfsCounter, 2211 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 2367 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2266 SdHoareTripleChecker+Valid, 2825 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 2367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:11:41,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2266 Valid, 2825 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 2367 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:11:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77604 states. [2021-12-17 21:11:46,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77604 to 59488. [2021-12-17 21:11:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59488 states, 54008 states have (on average 1.5559176418308398) internal successors, (84032), 55390 states have internal predecessors, (84032), 2950 states have call successors, (2950), 1092 states have call predecessors, (2950), 2528 states have return successors, (11238), 3070 states have call predecessors, (11238), 2946 states have call successors, (11238) [2021-12-17 21:11:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59488 states to 59488 states and 98220 transitions. [2021-12-17 21:11:46,903 INFO L78 Accepts]: Start accepts. Automaton has 59488 states and 98220 transitions. Word has length 179 [2021-12-17 21:11:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:11:46,903 INFO L470 AbstractCegarLoop]: Abstraction has 59488 states and 98220 transitions. [2021-12-17 21:11:46,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-17 21:11:46,903 INFO L276 IsEmpty]: Start isEmpty. Operand 59488 states and 98220 transitions. [2021-12-17 21:11:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-17 21:11:46,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:11:46,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:11:46,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 21:11:46,912 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:11:46,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:11:46,912 INFO L85 PathProgramCache]: Analyzing trace with hash -57050790, now seen corresponding path program 1 times [2021-12-17 21:11:46,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:11:46,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571067730] [2021-12-17 21:11:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:11:46,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:11:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:46,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:11:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:46,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-17 21:11:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:47,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 21:11:47,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:47,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-17 21:11:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:47,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-17 21:11:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:11:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:11:47,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:11:47,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571067730] [2021-12-17 21:11:47,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571067730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:11:47,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:11:47,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:11:47,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521598372] [2021-12-17 21:11:47,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:11:47,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:11:47,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:11:47,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:11:47,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:11:47,070 INFO L87 Difference]: Start difference. First operand 59488 states and 98220 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-17 21:11:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:11:59,678 INFO L93 Difference]: Finished difference Result 148521 states and 243494 transitions. [2021-12-17 21:11:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 21:11:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-17 21:11:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:11:59,926 INFO L225 Difference]: With dead ends: 148521 [2021-12-17 21:11:59,927 INFO L226 Difference]: Without dead ends: 93024 [2021-12-17 21:12:00,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:12:00,050 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 1325 mSDsluCounter, 1868 mSDsCounter, 0 mSdLazyCounter, 2187 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 2611 SdHoareTripleChecker+Invalid, 2289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:12:00,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1325 Valid, 2611 Invalid, 2289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2187 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 21:12:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93024 states.