./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:50:00,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:50:00,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:50:00,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:50:00,849 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:50:00,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:50:00,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:50:00,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:50:00,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:50:00,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:50:00,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:50:00,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:50:00,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:50:00,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:50:00,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:50:00,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:50:00,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:50:00,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:50:00,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:50:00,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:50:00,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:50:00,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:50:00,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:50:00,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:50:00,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:50:00,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:50:00,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:50:00,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:50:00,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:50:00,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:50:00,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:50:00,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:50:00,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:50:00,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:50:00,896 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:50:00,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:50:00,897 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:50:00,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:50:00,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:50:00,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:50:00,900 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:50:00,901 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:50:00,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:50:00,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:50:00,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:50:00,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:50:00,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:50:00,951 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:50:00,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:50:00,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:50:00,951 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:50:00,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:50:00,966 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:50:00,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:50:00,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:50:00,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:50:00,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:50:00,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:50:00,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:50:00,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:50:00,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:50:00,968 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:50:00,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:50:00,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:50:00,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:50:00,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:50:00,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:50:00,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:50:00,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:50:00,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:50:00,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:50:00,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:50:00,971 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:50:00,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:50:00,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:50:00,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:50:00,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8ee20bd48f38d06d172550f7b4afad7a85599a8fd397bba890e4eeccd52db93 [2021-12-21 14:50:01,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:50:01,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:50:01,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:50:01,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:50:01,216 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:50:01,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2021-12-21 14:50:01,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3658ef90/f760a04a4c45430db644f7f34dd1c214/FLAG6d3516408 [2021-12-21 14:50:01,729 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:50:01,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2021-12-21 14:50:01,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3658ef90/f760a04a4c45430db644f7f34dd1c214/FLAG6d3516408 [2021-12-21 14:50:02,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3658ef90/f760a04a4c45430db644f7f34dd1c214 [2021-12-21 14:50:02,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:50:02,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:50:02,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:50:02,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:50:02,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:50:02,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f80dab2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02, skipping insertion in model container [2021-12-21 14:50:02,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:50:02,127 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:50:02,246 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2021-12-21 14:50:02,299 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2021-12-21 14:50:02,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:50:02,412 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:50:02,430 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[913,926] [2021-12-21 14:50:02,463 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.08.cil-2.c[5977,5990] [2021-12-21 14:50:02,512 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:50:02,539 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:50:02,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02 WrapperNode [2021-12-21 14:50:02,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:50:02,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:50:02,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:50:02,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:50:02,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,638 INFO L137 Inliner]: procedures = 64, calls = 73, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 828 [2021-12-21 14:50:02,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:50:02,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:50:02,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:50:02,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:50:02,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:50:02,715 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:50:02,715 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:50:02,715 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:50:02,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (1/1) ... [2021-12-21 14:50:02,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:50:02,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:02,762 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) [2021-12-21 14:50:02,783 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 [2021-12-21 14:50:02,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:50:02,797 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-21 14:50:02,797 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-21 14:50:02,797 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-21 14:50:02,797 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-21 14:50:02,797 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-21 14:50:02,798 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-21 14:50:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-21 14:50:02,798 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-21 14:50:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-21 14:50:02,798 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-21 14:50:02,798 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-21 14:50:02,799 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-21 14:50:02,799 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-21 14:50:02,810 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-21 14:50:02,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:50:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-21 14:50:02,812 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-21 14:50:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:50:02,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:50:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-21 14:50:02,812 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-21 14:50:02,812 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-21 14:50:02,812 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-21 14:50:02,916 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:50:02,918 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:50:03,473 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:50:03,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:50:03,483 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-12-21 14:50:03,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:50:03 BoogieIcfgContainer [2021-12-21 14:50:03,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:50:03,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:50:03,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:50:03,489 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:50:03,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:50:02" (1/3) ... [2021-12-21 14:50:03,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5404df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:50:03, skipping insertion in model container [2021-12-21 14:50:03,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:50:02" (2/3) ... [2021-12-21 14:50:03,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5404df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:50:03, skipping insertion in model container [2021-12-21 14:50:03,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:50:03" (3/3) ... [2021-12-21 14:50:03,492 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.08.cil-2.c [2021-12-21 14:50:03,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:50:03,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:50:03,538 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:50:03,544 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 [2021-12-21 14:50:03,544 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:50:03,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 362 states, 319 states have (on average 1.6363636363636365) internal successors, (522), 326 states have internal predecessors, (522), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-12-21 14:50:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:50:03,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:03,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:03,572 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 975789426, now seen corresponding path program 1 times [2021-12-21 14:50:03,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:03,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181993182] [2021-12-21 14:50:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:03,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:03,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:03,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:50:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:03,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:03,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181993182] [2021-12-21 14:50:03,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181993182] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:03,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:03,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:03,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32036183] [2021-12-21 14:50:03,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:03,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:03,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:03,878 INFO L87 Difference]: Start difference. First operand has 362 states, 319 states have (on average 1.6363636363636365) internal successors, (522), 326 states have internal predecessors, (522), 30 states have call successors, (30), 10 states have call predecessors, (30), 10 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 14:50:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:04,336 INFO L93 Difference]: Finished difference Result 710 states and 1139 transitions. [2021-12-21 14:50:04,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:04,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-21 14:50:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:04,351 INFO L225 Difference]: With dead ends: 710 [2021-12-21 14:50:04,352 INFO L226 Difference]: Without dead ends: 360 [2021-12-21 14:50:04,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:04,361 INFO L933 BasicCegarLoop]: 550 mSDtfsCounter, 307 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:04,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 1077 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:50:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-21 14:50:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 351. [2021-12-21 14:50:04,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 311 states have (on average 1.540192926045016) internal successors, (479), 315 states have internal predecessors, (479), 30 states have call successors, (30), 10 states have call predecessors, (30), 8 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 14:50:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 535 transitions. [2021-12-21 14:50:04,426 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 535 transitions. Word has length 44 [2021-12-21 14:50:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:04,426 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 535 transitions. [2021-12-21 14:50:04,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 14:50:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 535 transitions. [2021-12-21 14:50:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-21 14:50:04,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:04,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:04,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:50:04,430 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:04,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1473810704, now seen corresponding path program 1 times [2021-12-21 14:50:04,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:04,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715339916] [2021-12-21 14:50:04,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:04,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 14:50:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:04,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:04,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715339916] [2021-12-21 14:50:04,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715339916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:04,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:04,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:04,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495314063] [2021-12-21 14:50:04,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:04,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:04,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:04,526 INFO L87 Difference]: Start difference. First operand 351 states and 535 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:04,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:04,709 INFO L93 Difference]: Finished difference Result 483 states and 720 transitions. [2021-12-21 14:50:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:04,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-21 14:50:04,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:04,714 INFO L225 Difference]: With dead ends: 483 [2021-12-21 14:50:04,714 INFO L226 Difference]: Without dead ends: 421 [2021-12-21 14:50:04,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:04,717 INFO L933 BasicCegarLoop]: 548 mSDtfsCounter, 708 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:04,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 882 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-21 14:50:04,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 415. [2021-12-21 14:50:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 368 states have (on average 1.5081521739130435) internal successors, (555), 373 states have internal predecessors, (555), 34 states have call successors, (34), 12 states have call predecessors, (34), 11 states have return successors, (36), 30 states have call predecessors, (36), 30 states have call successors, (36) [2021-12-21 14:50:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 625 transitions. [2021-12-21 14:50:04,748 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 625 transitions. Word has length 44 [2021-12-21 14:50:04,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:04,748 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 625 transitions. [2021-12-21 14:50:04,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 625 transitions. [2021-12-21 14:50:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:50:04,751 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:04,751 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:04,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:50:04,752 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash 852707101, now seen corresponding path program 1 times [2021-12-21 14:50:04,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:04,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673831175] [2021-12-21 14:50:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:04,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:50:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:04,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:04,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673831175] [2021-12-21 14:50:04,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673831175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:04,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:04,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:04,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345533247] [2021-12-21 14:50:04,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:04,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:04,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:04,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:04,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:04,826 INFO L87 Difference]: Start difference. First operand 415 states and 625 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:05,133 INFO L93 Difference]: Finished difference Result 663 states and 965 transitions. [2021-12-21 14:50:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:05,134 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:50:05,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:05,138 INFO L225 Difference]: With dead ends: 663 [2021-12-21 14:50:05,138 INFO L226 Difference]: Without dead ends: 539 [2021-12-21 14:50:05,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:05,140 INFO L933 BasicCegarLoop]: 581 mSDtfsCounter, 288 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1183 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:05,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1183 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:50:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-12-21 14:50:05,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 482. [2021-12-21 14:50:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 429 states have (on average 1.4895104895104896) internal successors, (639), 434 states have internal predecessors, (639), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (39), 33 states have call predecessors, (39), 33 states have call successors, (39) [2021-12-21 14:50:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 715 transitions. [2021-12-21 14:50:05,184 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 715 transitions. Word has length 45 [2021-12-21 14:50:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:05,184 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 715 transitions. [2021-12-21 14:50:05,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:05,185 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 715 transitions. [2021-12-21 14:50:05,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 14:50:05,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:05,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:05,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:50:05,187 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:05,188 INFO L85 PathProgramCache]: Analyzing trace with hash -431650360, now seen corresponding path program 1 times [2021-12-21 14:50:05,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:05,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253272686] [2021-12-21 14:50:05,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:05,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:05,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:05,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 14:50:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:05,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253272686] [2021-12-21 14:50:05,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253272686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:05,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:05,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:05,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204979575] [2021-12-21 14:50:05,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:05,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:05,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:05,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:05,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:05,270 INFO L87 Difference]: Start difference. First operand 482 states and 715 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:05,416 INFO L93 Difference]: Finished difference Result 890 states and 1274 transitions. [2021-12-21 14:50:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:05,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-21 14:50:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:05,422 INFO L225 Difference]: With dead ends: 890 [2021-12-21 14:50:05,422 INFO L226 Difference]: Without dead ends: 699 [2021-12-21 14:50:05,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:05,431 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 725 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 904 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:05,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [747 Valid, 904 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-12-21 14:50:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 647. [2021-12-21 14:50:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 575 states have (on average 1.4417391304347826) internal successors, (829), 583 states have internal predecessors, (829), 48 states have call successors, (48), 22 states have call predecessors, (48), 22 states have return successors, (56), 42 states have call predecessors, (56), 44 states have call successors, (56) [2021-12-21 14:50:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 933 transitions. [2021-12-21 14:50:05,474 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 933 transitions. Word has length 45 [2021-12-21 14:50:05,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:05,474 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 933 transitions. [2021-12-21 14:50:05,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 14:50:05,475 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 933 transitions. [2021-12-21 14:50:05,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-21 14:50:05,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:05,479 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:05,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:50:05,481 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:05,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1757585952, now seen corresponding path program 1 times [2021-12-21 14:50:05,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:05,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416793098] [2021-12-21 14:50:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:05,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:05,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:05,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:05,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-21 14:50:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:05,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:50:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 14:50:05,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:05,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416793098] [2021-12-21 14:50:05,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416793098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:05,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:05,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:05,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405586376] [2021-12-21 14:50:05,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:05,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:05,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:05,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:05,552 INFO L87 Difference]: Start difference. First operand 647 states and 933 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:05,904 INFO L93 Difference]: Finished difference Result 991 states and 1394 transitions. [2021-12-21 14:50:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:05,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-21 14:50:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:05,909 INFO L225 Difference]: With dead ends: 991 [2021-12-21 14:50:05,909 INFO L226 Difference]: Without dead ends: 754 [2021-12-21 14:50:05,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:05,911 INFO L933 BasicCegarLoop]: 604 mSDtfsCounter, 272 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:05,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 1212 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 14:50:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-21 14:50:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 716. [2021-12-21 14:50:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 635 states have (on average 1.415748031496063) internal successors, (899), 644 states have internal predecessors, (899), 53 states have call successors, (53), 25 states have call predecessors, (53), 26 states have return successors, (65), 47 states have call predecessors, (65), 49 states have call successors, (65) [2021-12-21 14:50:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1017 transitions. [2021-12-21 14:50:05,942 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1017 transitions. Word has length 62 [2021-12-21 14:50:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:05,942 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1017 transitions. [2021-12-21 14:50:05,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1017 transitions. [2021-12-21 14:50:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 14:50:05,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:05,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:05,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:50:05,945 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2041601228, now seen corresponding path program 1 times [2021-12-21 14:50:05,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:05,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792295431] [2021-12-21 14:50:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:05,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:05,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:06,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 14:50:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:06,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 14:50:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 14:50:06,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792295431] [2021-12-21 14:50:06,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792295431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:06,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:06,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 14:50:06,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208216532] [2021-12-21 14:50:06,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:06,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:06,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 14:50:06,019 INFO L87 Difference]: Start difference. First operand 716 states and 1017 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:50:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:06,169 INFO L93 Difference]: Finished difference Result 1267 states and 1739 transitions. [2021-12-21 14:50:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:50:06,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-21 14:50:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:06,176 INFO L225 Difference]: With dead ends: 1267 [2021-12-21 14:50:06,176 INFO L226 Difference]: Without dead ends: 889 [2021-12-21 14:50:06,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:06,179 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 712 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:06,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 901 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-12-21 14:50:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 834. [2021-12-21 14:50:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 740 states have (on average 1.385135135135135) internal successors, (1025), 750 states have internal predecessors, (1025), 60 states have call successors, (60), 30 states have call predecessors, (60), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2021-12-21 14:50:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1161 transitions. [2021-12-21 14:50:06,221 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1161 transitions. Word has length 67 [2021-12-21 14:50:06,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:06,221 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1161 transitions. [2021-12-21 14:50:06,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 14:50:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1161 transitions. [2021-12-21 14:50:06,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 14:50:06,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:06,224 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:06,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:50:06,224 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:06,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:06,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1554818621, now seen corresponding path program 1 times [2021-12-21 14:50:06,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:06,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515311916] [2021-12-21 14:50:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:06,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:06,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:06,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:06,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:50:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:50:06,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:06,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515311916] [2021-12-21 14:50:06,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515311916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:06,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386637501] [2021-12-21 14:50:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:06,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:06,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:06,329 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) [2021-12-21 14:50:06,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 14:50:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:06,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 14:50:06,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:06,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:50:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:06,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386637501] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:06,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 14:50:06,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-21 14:50:06,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71361743] [2021-12-21 14:50:06,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:06,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 14:50:06,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 14:50:06,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:06,805 INFO L87 Difference]: Start difference. First operand 834 states and 1161 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:06,944 INFO L93 Difference]: Finished difference Result 889 states and 1228 transitions. [2021-12-21 14:50:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 14:50:06,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-21 14:50:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:06,949 INFO L225 Difference]: With dead ends: 889 [2021-12-21 14:50:06,949 INFO L226 Difference]: Without dead ends: 886 [2021-12-21 14:50:06,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:50:06,950 INFO L933 BasicCegarLoop]: 560 mSDtfsCounter, 965 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:06,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [965 Valid, 627 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:50:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-12-21 14:50:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 833. [2021-12-21 14:50:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 740 states have (on average 1.3824324324324324) internal successors, (1023), 749 states have internal predecessors, (1023), 59 states have call successors, (59), 30 states have call predecessors, (59), 32 states have return successors, (76), 54 states have call predecessors, (76), 56 states have call successors, (76) [2021-12-21 14:50:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1158 transitions. [2021-12-21 14:50:06,986 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1158 transitions. Word has length 68 [2021-12-21 14:50:06,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:06,987 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1158 transitions. [2021-12-21 14:50:06,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 14:50:06,987 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1158 transitions. [2021-12-21 14:50:06,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 14:50:06,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:06,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:07,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:07,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:07,212 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:07,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash 953609583, now seen corresponding path program 1 times [2021-12-21 14:50:07,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:07,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904724561] [2021-12-21 14:50:07,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:07,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:07,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:07,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 14:50:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:07,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 14:50:07,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:07,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904724561] [2021-12-21 14:50:07,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904724561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:07,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787960658] [2021-12-21 14:50:07,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:07,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:07,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:07,308 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:07,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 14:50:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:07,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-21 14:50:07,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:07,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 14:50:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:07,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787960658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 14:50:07,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 14:50:07,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-21 14:50:07,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163488177] [2021-12-21 14:50:07,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 14:50:07,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 14:50:07,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:07,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 14:50:07,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:07,943 INFO L87 Difference]: Start difference. First operand 833 states and 1158 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:50:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:09,225 INFO L93 Difference]: Finished difference Result 2362 states and 3155 transitions. [2021-12-21 14:50:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-21 14:50:09,226 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-21 14:50:09,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:09,235 INFO L225 Difference]: With dead ends: 2362 [2021-12-21 14:50:09,235 INFO L226 Difference]: Without dead ends: 1918 [2021-12-21 14:50:09,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 14:50:09,238 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 1079 mSDsluCounter, 2724 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 3389 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:09,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1108 Valid, 3389 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:50:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2021-12-21 14:50:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1207. [2021-12-21 14:50:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1078 states have (on average 1.3413729128014842) internal successors, (1446), 1093 states have internal predecessors, (1446), 78 states have call successors, (78), 43 states have call predecessors, (78), 49 states have return successors, (107), 71 states have call predecessors, (107), 75 states have call successors, (107) [2021-12-21 14:50:09,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1631 transitions. [2021-12-21 14:50:09,304 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1631 transitions. Word has length 69 [2021-12-21 14:50:09,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:09,305 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 1631 transitions. [2021-12-21 14:50:09,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 14:50:09,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1631 transitions. [2021-12-21 14:50:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 14:50:09,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:09,312 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:09,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:09,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-21 14:50:09,527 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:09,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2034031846, now seen corresponding path program 1 times [2021-12-21 14:50:09,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:09,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912079337] [2021-12-21 14:50:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:09,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:09,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:09,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:09,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 14:50:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:09,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 14:50:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 14:50:09,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:09,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912079337] [2021-12-21 14:50:09,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912079337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:09,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872168656] [2021-12-21 14:50:09,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:09,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:09,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:09,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:09,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 14:50:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:09,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 14:50:09,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 14:50:09,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:50:09,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872168656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:09,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:50:09,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:50:09,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932525844] [2021-12-21 14:50:09,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:09,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:50:09,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:09,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:50:09,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:09,851 INFO L87 Difference]: Start difference. First operand 1207 states and 1631 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:50:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:09,908 INFO L93 Difference]: Finished difference Result 1851 states and 2469 transitions. [2021-12-21 14:50:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:50:09,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-21 14:50:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:09,913 INFO L225 Difference]: With dead ends: 1851 [2021-12-21 14:50:09,914 INFO L226 Difference]: Without dead ends: 1103 [2021-12-21 14:50:09,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:09,916 INFO L933 BasicCegarLoop]: 566 mSDtfsCounter, 496 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:09,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 640 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:50:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-12-21 14:50:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1091. [2021-12-21 14:50:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 975 states have (on average 1.3425641025641026) internal successors, (1309), 990 states have internal predecessors, (1309), 71 states have call successors, (71), 38 states have call predecessors, (71), 43 states have return successors, (96), 63 states have call predecessors, (96), 68 states have call successors, (96) [2021-12-21 14:50:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1476 transitions. [2021-12-21 14:50:09,966 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1476 transitions. Word has length 88 [2021-12-21 14:50:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:09,966 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1476 transitions. [2021-12-21 14:50:09,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-21 14:50:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1476 transitions. [2021-12-21 14:50:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-21 14:50:09,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:09,969 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:50:09,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:10,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:10,188 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash 487728341, now seen corresponding path program 1 times [2021-12-21 14:50:10,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:10,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145787127] [2021-12-21 14:50:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:10,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-21 14:50:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 14:50:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 14:50:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 14:50:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 14:50:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-21 14:50:10,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145787127] [2021-12-21 14:50:10,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145787127] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 14:50:10,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881712045] [2021-12-21 14:50:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:10,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:10,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:50:10,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 14:50:10,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 14:50:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 14:50:10,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 14:50:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 14:50:10,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 14:50:10,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881712045] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:10,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 14:50:10,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 14:50:10,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231276991] [2021-12-21 14:50:10,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:10,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:50:10,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:10,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:50:10,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:10,534 INFO L87 Difference]: Start difference. First operand 1091 states and 1476 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:50:10,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:10,575 INFO L93 Difference]: Finished difference Result 1403 states and 1864 transitions. [2021-12-21 14:50:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:50:10,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-21 14:50:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:10,578 INFO L225 Difference]: With dead ends: 1403 [2021-12-21 14:50:10,578 INFO L226 Difference]: Without dead ends: 285 [2021-12-21 14:50:10,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:10,581 INFO L933 BasicCegarLoop]: 579 mSDtfsCounter, 61 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1089 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:10,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1089 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:50:10,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-21 14:50:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2021-12-21 14:50:10,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.5669291338582678) internal successors, (398), 256 states have internal predecessors, (398), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-21 14:50:10,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 444 transitions. [2021-12-21 14:50:10,593 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 444 transitions. Word has length 103 [2021-12-21 14:50:10,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:10,593 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 444 transitions. [2021-12-21 14:50:10,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-21 14:50:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 444 transitions. [2021-12-21 14:50:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:10,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:10,595 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] [2021-12-21 14:50:10,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 14:50:10,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 14:50:10,807 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1195242880, now seen corresponding path program 1 times [2021-12-21 14:50:10,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:10,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280937586] [2021-12-21 14:50:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:10,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:10,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:10,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:10,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280937586] [2021-12-21 14:50:10,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280937586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:10,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:10,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:50:10,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289717579] [2021-12-21 14:50:10,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:10,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:50:10,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:50:10,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:50:10,915 INFO L87 Difference]: Start difference. First operand 285 states and 444 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-12-21 14:50:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:11,740 INFO L93 Difference]: Finished difference Result 659 states and 1044 transitions. [2021-12-21 14:50:11,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:50:11,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:11,743 INFO L225 Difference]: With dead ends: 659 [2021-12-21 14:50:11,743 INFO L226 Difference]: Without dead ends: 383 [2021-12-21 14:50:11,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:50:11,745 INFO L933 BasicCegarLoop]: 485 mSDtfsCounter, 742 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:11,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 807 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:50:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-12-21 14:50:11,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 285. [2021-12-21 14:50:11,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 254 states have (on average 1.562992125984252) internal successors, (397), 256 states have internal predecessors, (397), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-21 14:50:11,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 443 transitions. [2021-12-21 14:50:11,761 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 443 transitions. Word has length 135 [2021-12-21 14:50:11,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:11,761 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 443 transitions. [2021-12-21 14:50:11,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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) [2021-12-21 14:50:11,762 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 443 transitions. [2021-12-21 14:50:11,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:11,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:11,763 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] [2021-12-21 14:50:11,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:50:11,763 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:11,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:11,764 INFO L85 PathProgramCache]: Analyzing trace with hash -488646274, now seen corresponding path program 1 times [2021-12-21 14:50:11,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:11,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260923454] [2021-12-21 14:50:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:11,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:11,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:11,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:11,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:11,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:11,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260923454] [2021-12-21 14:50:11,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260923454] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:11,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:11,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 14:50:11,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031219892] [2021-12-21 14:50:11,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:11,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:50:11,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:11,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:50:11,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:50:11,874 INFO L87 Difference]: Start difference. First operand 285 states and 443 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-12-21 14:50:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:13,622 INFO L93 Difference]: Finished difference Result 1027 states and 1634 transitions. [2021-12-21 14:50:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:50:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:13,626 INFO L225 Difference]: With dead ends: 1027 [2021-12-21 14:50:13,627 INFO L226 Difference]: Without dead ends: 759 [2021-12-21 14:50:13,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-21 14:50:13,628 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 1109 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:13,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 1304 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-21 14:50:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-12-21 14:50:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 562. [2021-12-21 14:50:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 507 states have (on average 1.5759368836291914) internal successors, (799), 510 states have internal predecessors, (799), 41 states have call successors, (41), 13 states have call predecessors, (41), 13 states have return successors, (42), 39 states have call predecessors, (42), 39 states have call successors, (42) [2021-12-21 14:50:13,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 882 transitions. [2021-12-21 14:50:13,663 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 882 transitions. Word has length 135 [2021-12-21 14:50:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:13,663 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 882 transitions. [2021-12-21 14:50:13,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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) [2021-12-21 14:50:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 882 transitions. [2021-12-21 14:50:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:13,665 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:13,665 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] [2021-12-21 14:50:13,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:50:13,665 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:13,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1850648710, now seen corresponding path program 1 times [2021-12-21 14:50:13,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:13,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349460008] [2021-12-21 14:50:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:13,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:13,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:13,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349460008] [2021-12-21 14:50:13,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349460008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:13,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:13,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:13,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877125831] [2021-12-21 14:50:13,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:13,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:13,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:13,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:13,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:13,776 INFO L87 Difference]: Start difference. First operand 562 states and 882 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:15,967 INFO L93 Difference]: Finished difference Result 1690 states and 2692 transitions. [2021-12-21 14:50:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:15,973 INFO L225 Difference]: With dead ends: 1690 [2021-12-21 14:50:15,973 INFO L226 Difference]: Without dead ends: 1145 [2021-12-21 14:50:15,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:15,977 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1120 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 2182 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1135 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:15,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1135 Valid, 2248 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2182 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 14:50:15,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-12-21 14:50:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 820. [2021-12-21 14:50:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 741 states have (on average 1.5695006747638327) internal successors, (1163), 745 states have internal predecessors, (1163), 58 states have call successors, (58), 19 states have call predecessors, (58), 20 states have return successors, (61), 57 states have call predecessors, (61), 56 states have call successors, (61) [2021-12-21 14:50:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1282 transitions. [2021-12-21 14:50:16,029 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1282 transitions. Word has length 135 [2021-12-21 14:50:16,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:16,030 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 1282 transitions. [2021-12-21 14:50:16,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1282 transitions. [2021-12-21 14:50:16,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:16,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:16,033 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] [2021-12-21 14:50:16,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:50:16,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:16,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash 78283516, now seen corresponding path program 1 times [2021-12-21 14:50:16,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:16,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402548640] [2021-12-21 14:50:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:16,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:16,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:16,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402548640] [2021-12-21 14:50:16,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402548640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:16,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:16,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:16,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307181136] [2021-12-21 14:50:16,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:16,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:16,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:16,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:16,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:16,165 INFO L87 Difference]: Start difference. First operand 820 states and 1282 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:18,222 INFO L93 Difference]: Finished difference Result 2667 states and 4240 transitions. [2021-12-21 14:50:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:18,231 INFO L225 Difference]: With dead ends: 2667 [2021-12-21 14:50:18,232 INFO L226 Difference]: Without dead ends: 1864 [2021-12-21 14:50:18,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:18,235 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 1117 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2188 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 2236 SdHoareTripleChecker+Invalid, 2262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:18,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 2236 Invalid, 2262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2188 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:50:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2021-12-21 14:50:18,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1337. [2021-12-21 14:50:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1210 states have (on average 1.5636363636363637) internal successors, (1892), 1216 states have internal predecessors, (1892), 92 states have call successors, (92), 31 states have call predecessors, (92), 34 states have return successors, (103), 93 states have call predecessors, (103), 90 states have call successors, (103) [2021-12-21 14:50:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2087 transitions. [2021-12-21 14:50:18,340 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2087 transitions. Word has length 135 [2021-12-21 14:50:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:18,340 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 2087 transitions. [2021-12-21 14:50:18,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2087 transitions. [2021-12-21 14:50:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:18,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:18,343 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] [2021-12-21 14:50:18,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:50:18,343 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash 2080169786, now seen corresponding path program 1 times [2021-12-21 14:50:18,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:18,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396606695] [2021-12-21 14:50:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:18,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:18,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:18,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396606695] [2021-12-21 14:50:18,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396606695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:18,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:18,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:18,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006136277] [2021-12-21 14:50:18,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:18,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:18,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:18,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:18,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:18,461 INFO L87 Difference]: Start difference. First operand 1337 states and 2087 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:20,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:20,613 INFO L93 Difference]: Finished difference Result 4548 states and 7205 transitions. [2021-12-21 14:50:20,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:20,614 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:20,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:20,630 INFO L225 Difference]: With dead ends: 4548 [2021-12-21 14:50:20,630 INFO L226 Difference]: Without dead ends: 3228 [2021-12-21 14:50:20,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:20,638 INFO L933 BasicCegarLoop]: 734 mSDtfsCounter, 1113 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 2257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:20,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 2232 Invalid, 2257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 14:50:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2021-12-21 14:50:20,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 2372. [2021-12-21 14:50:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2372 states, 2149 states have (on average 1.5588645881805492) internal successors, (3350), 2159 states have internal predecessors, (3350), 160 states have call successors, (160), 55 states have call predecessors, (160), 62 states have return successors, (193), 165 states have call predecessors, (193), 158 states have call successors, (193) [2021-12-21 14:50:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 3703 transitions. [2021-12-21 14:50:20,823 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 3703 transitions. Word has length 135 [2021-12-21 14:50:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:20,824 INFO L470 AbstractCegarLoop]: Abstraction has 2372 states and 3703 transitions. [2021-12-21 14:50:20,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 3703 transitions. [2021-12-21 14:50:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:20,826 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:20,827 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] [2021-12-21 14:50:20,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:50:20,827 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -487652548, now seen corresponding path program 1 times [2021-12-21 14:50:20,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:20,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769697469] [2021-12-21 14:50:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:20,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:20,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:20,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:20,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769697469] [2021-12-21 14:50:20,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769697469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:20,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:20,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:20,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733357533] [2021-12-21 14:50:20,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:20,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:20,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:20,959 INFO L87 Difference]: Start difference. First operand 2372 states and 3703 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:23,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:23,193 INFO L93 Difference]: Finished difference Result 8309 states and 13151 transitions. [2021-12-21 14:50:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:23,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:23,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:23,219 INFO L225 Difference]: With dead ends: 8309 [2021-12-21 14:50:23,219 INFO L226 Difference]: Without dead ends: 5954 [2021-12-21 14:50:23,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:23,228 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 1109 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1124 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:23,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1124 Valid, 2228 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:50:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2021-12-21 14:50:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 4447. [2021-12-21 14:50:23,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5555555555555556) internal successors, (6272), 4050 states have internal predecessors, (6272), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-21 14:50:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6959 transitions. [2021-12-21 14:50:23,572 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6959 transitions. Word has length 135 [2021-12-21 14:50:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:23,572 INFO L470 AbstractCegarLoop]: Abstraction has 4447 states and 6959 transitions. [2021-12-21 14:50:23,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6959 transitions. [2021-12-21 14:50:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:23,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:23,577 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] [2021-12-21 14:50:23,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:50:23,578 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash -16296198, now seen corresponding path program 1 times [2021-12-21 14:50:23,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:23,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828295437] [2021-12-21 14:50:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:23,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:23,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:23,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:23,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828295437] [2021-12-21 14:50:23,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828295437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:23,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:23,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:23,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902604794] [2021-12-21 14:50:23,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:23,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:23,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:23,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:23,693 INFO L87 Difference]: Start difference. First operand 4447 states and 6959 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:24,910 INFO L93 Difference]: Finished difference Result 10448 states and 16604 transitions. [2021-12-21 14:50:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:24,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:24,936 INFO L225 Difference]: With dead ends: 10448 [2021-12-21 14:50:24,937 INFO L226 Difference]: Without dead ends: 6018 [2021-12-21 14:50:24,949 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 [2021-12-21 14:50:24,950 INFO L933 BasicCegarLoop]: 460 mSDtfsCounter, 926 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:24,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 1024 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 14:50:24,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2021-12-21 14:50:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 4447. [2021-12-21 14:50:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5513392857142858) internal successors, (6255), 4050 states have internal predecessors, (6255), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-21 14:50:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6942 transitions. [2021-12-21 14:50:25,290 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6942 transitions. Word has length 135 [2021-12-21 14:50:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:25,290 INFO L470 AbstractCegarLoop]: Abstraction has 4447 states and 6942 transitions. [2021-12-21 14:50:25,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6942 transitions. [2021-12-21 14:50:25,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:25,294 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:25,294 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] [2021-12-21 14:50:25,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:50:25,294 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:25,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:25,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1663659140, now seen corresponding path program 1 times [2021-12-21 14:50:25,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:25,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706107468] [2021-12-21 14:50:25,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:25,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:25,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:25,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706107468] [2021-12-21 14:50:25,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706107468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:25,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:25,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:25,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510199262] [2021-12-21 14:50:25,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:25,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:25,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:25,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:25,399 INFO L87 Difference]: Start difference. First operand 4447 states and 6942 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:26,608 INFO L93 Difference]: Finished difference Result 10430 states and 16518 transitions. [2021-12-21 14:50:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:50:26,608 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:26,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:26,631 INFO L225 Difference]: With dead ends: 10430 [2021-12-21 14:50:26,631 INFO L226 Difference]: Without dead ends: 6000 [2021-12-21 14:50:26,643 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 [2021-12-21 14:50:26,644 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 853 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:26,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 1145 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 14:50:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6000 states. [2021-12-21 14:50:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6000 to 4447. [2021-12-21 14:50:26,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4447 states, 4032 states have (on average 1.5471230158730158) internal successors, (6238), 4050 states have internal predecessors, (6238), 296 states have call successors, (296), 103 states have call predecessors, (296), 118 states have return successors, (391), 309 states have call predecessors, (391), 294 states have call successors, (391) [2021-12-21 14:50:26,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4447 states to 4447 states and 6925 transitions. [2021-12-21 14:50:26,953 INFO L78 Accepts]: Start accepts. Automaton has 4447 states and 6925 transitions. Word has length 135 [2021-12-21 14:50:26,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:26,954 INFO L470 AbstractCegarLoop]: Abstraction has 4447 states and 6925 transitions. [2021-12-21 14:50:26,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4447 states and 6925 transitions. [2021-12-21 14:50:26,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:26,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:26,957 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] [2021-12-21 14:50:26,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:50:26,958 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:26,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:26,958 INFO L85 PathProgramCache]: Analyzing trace with hash 499957434, now seen corresponding path program 1 times [2021-12-21 14:50:26,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:26,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351024243] [2021-12-21 14:50:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:26,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:26,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:27,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:27,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:27,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:27,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:27,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:27,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351024243] [2021-12-21 14:50:27,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351024243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:27,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:27,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:27,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448777568] [2021-12-21 14:50:27,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:27,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:27,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:27,061 INFO L87 Difference]: Start difference. First operand 4447 states and 6925 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:29,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:29,625 INFO L93 Difference]: Finished difference Result 15775 states and 24829 transitions. [2021-12-21 14:50:29,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 14:50:29,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:29,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:29,664 INFO L225 Difference]: With dead ends: 15775 [2021-12-21 14:50:29,664 INFO L226 Difference]: Without dead ends: 11345 [2021-12-21 14:50:29,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:50:29,679 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 1091 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 2119 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 2197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:29,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 2206 Invalid, 2197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2119 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:50:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11345 states. [2021-12-21 14:50:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11345 to 8659. [2021-12-21 14:50:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8659 states, 7860 states have (on average 1.5440203562340966) internal successors, (12136), 7894 states have internal predecessors, (12136), 568 states have call successors, (568), 199 states have call predecessors, (568), 230 states have return successors, (841), 597 states have call predecessors, (841), 566 states have call successors, (841) [2021-12-21 14:50:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8659 states to 8659 states and 13545 transitions. [2021-12-21 14:50:30,346 INFO L78 Accepts]: Start accepts. Automaton has 8659 states and 13545 transitions. Word has length 135 [2021-12-21 14:50:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:30,347 INFO L470 AbstractCegarLoop]: Abstraction has 8659 states and 13545 transitions. [2021-12-21 14:50:30,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 8659 states and 13545 transitions. [2021-12-21 14:50:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:30,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:30,356 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] [2021-12-21 14:50:30,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 14:50:30,357 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:30,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1473207944, now seen corresponding path program 1 times [2021-12-21 14:50:30,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:30,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399154228] [2021-12-21 14:50:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:30,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:30,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:30,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:30,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:30,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:30,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:30,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:30,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399154228] [2021-12-21 14:50:30,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399154228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:30,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:30,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:30,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465783955] [2021-12-21 14:50:30,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:30,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:30,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:30,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:30,514 INFO L87 Difference]: Start difference. First operand 8659 states and 13545 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:34,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:34,364 INFO L93 Difference]: Finished difference Result 34689 states and 54625 transitions. [2021-12-21 14:50:34,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:34,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:34,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:34,464 INFO L225 Difference]: With dead ends: 34689 [2021-12-21 14:50:34,464 INFO L226 Difference]: Without dead ends: 26047 [2021-12-21 14:50:34,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:34,496 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 1420 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1444 SdHoareTripleChecker+Valid, 2191 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:34,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1444 Valid, 2191 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 14:50:34,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26047 states. [2021-12-21 14:50:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26047 to 17012. [2021-12-21 14:50:35,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17012 states, 15477 states have (on average 1.5443561413710667) internal successors, (23902), 15543 states have internal predecessors, (23902), 1080 states have call successors, (1080), 391 states have call predecessors, (1080), 454 states have return successors, (1871), 1141 states have call predecessors, (1871), 1078 states have call successors, (1871) [2021-12-21 14:50:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17012 states to 17012 states and 26853 transitions. [2021-12-21 14:50:35,685 INFO L78 Accepts]: Start accepts. Automaton has 17012 states and 26853 transitions. Word has length 135 [2021-12-21 14:50:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:35,685 INFO L470 AbstractCegarLoop]: Abstraction has 17012 states and 26853 transitions. [2021-12-21 14:50:35,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 17012 states and 26853 transitions. [2021-12-21 14:50:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:35,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:35,696 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] [2021-12-21 14:50:35,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 14:50:35,697 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash 679898874, now seen corresponding path program 1 times [2021-12-21 14:50:35,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:35,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336710125] [2021-12-21 14:50:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:35,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:35,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:35,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:35,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:35,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:35,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:35,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:35,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:35,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336710125] [2021-12-21 14:50:35,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336710125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:35,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:35,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:35,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238149860] [2021-12-21 14:50:35,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:35,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:35,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:35,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:35,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:35,806 INFO L87 Difference]: Start difference. First operand 17012 states and 26853 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:42,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:42,269 INFO L93 Difference]: Finished difference Result 67584 states and 107315 transitions. [2021-12-21 14:50:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:42,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:42,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:42,482 INFO L225 Difference]: With dead ends: 67584 [2021-12-21 14:50:42,482 INFO L226 Difference]: Without dead ends: 50589 [2021-12-21 14:50:42,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:42,549 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 1161 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 2464 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:42,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1175 Valid, 2306 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2464 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 14:50:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50589 states. [2021-12-21 14:50:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50589 to 33045. [2021-12-21 14:50:45,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33045 states, 30070 states have (on average 1.5401396740937812) internal successors, (46312), 30200 states have internal predecessors, (46312), 2072 states have call successors, (2072), 775 states have call predecessors, (2072), 902 states have return successors, (4385), 2197 states have call predecessors, (4385), 2070 states have call successors, (4385) [2021-12-21 14:50:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33045 states to 33045 states and 52769 transitions. [2021-12-21 14:50:45,378 INFO L78 Accepts]: Start accepts. Automaton has 33045 states and 52769 transitions. Word has length 135 [2021-12-21 14:50:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:50:45,378 INFO L470 AbstractCegarLoop]: Abstraction has 33045 states and 52769 transitions. [2021-12-21 14:50:45,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 33045 states and 52769 transitions. [2021-12-21 14:50:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-21 14:50:45,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:50:45,399 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] [2021-12-21 14:50:45,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 14:50:45,400 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:50:45,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:50:45,400 INFO L85 PathProgramCache]: Analyzing trace with hash 56617272, now seen corresponding path program 1 times [2021-12-21 14:50:45,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:50:45,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859204427] [2021-12-21 14:50:45,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:50:45,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:50:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 14:50:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 14:50:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 14:50:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-21 14:50:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 14:50:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:50:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:50:45,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:50:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859204427] [2021-12-21 14:50:45,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859204427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:50:45,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:50:45,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 14:50:45,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726358318] [2021-12-21 14:50:45,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:50:45,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 14:50:45,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:50:45,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 14:50:45,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:50:45,713 INFO L87 Difference]: Start difference. First operand 33045 states and 52769 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2021-12-21 14:50:56,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:50:56,385 INFO L93 Difference]: Finished difference Result 130271 states and 209233 transitions. [2021-12-21 14:50:56,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 14:50:56,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2021-12-21 14:50:56,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:50:56,802 INFO L225 Difference]: With dead ends: 130271 [2021-12-21 14:50:56,803 INFO L226 Difference]: Without dead ends: 97243 [2021-12-21 14:50:56,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 14:50:56,909 INFO L933 BasicCegarLoop]: 691 mSDtfsCounter, 1340 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1364 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-21 14:50:56,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1364 Valid, 2181 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-21 14:50:57,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97243 states.