./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.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 94e951826a6b890c42a47666caa0401c27bf1b0a09941efa99a0e4bb1e9e9065 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:45:26,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:45:26,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:45:26,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:45:26,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:45:26,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:45:26,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:45:26,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:45:26,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:45:26,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:45:26,867 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:45:26,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:45:26,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:45:26,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:45:26,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:45:26,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:45:26,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:45:26,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:45:26,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:45:26,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:45:26,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:45:26,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:45:26,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:45:26,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:45:26,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:45:26,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:45:26,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:45:26,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:45:26,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:45:26,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:45:26,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:45:26,899 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:45:26,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:45:26,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:45:26,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:45:26,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:45:26,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:45:26,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:45:26,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:45:26,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:45:26,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:45:26,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:45:26,939 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:45:26,940 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:45:26,940 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:45:26,940 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:45:26,941 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:45:26,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:45:26,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:45:26,942 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:45:26,942 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:45:26,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:45:26,944 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:45:26,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:45:26,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:45:26,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:45:26,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:45:26,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:45:26,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:45:26,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:45:26,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:45:26,945 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:45:26,946 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:45:26,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:45:26,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:45:26,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:45:26,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:45:26,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:45:26,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:45:26,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:45:26,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:45:26,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:45:26,948 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:45:26,948 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:45:26,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:45:26,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:45:26,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94e951826a6b890c42a47666caa0401c27bf1b0a09941efa99a0e4bb1e9e9065 [2021-12-14 15:45:27,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:45:27,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:45:27,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:45:27,180 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:45:27,181 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:45:27,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c [2021-12-14 15:45:27,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac48d4a53/00c5d97ba58648f8a041c9619e11ae40/FLAGc7b86eefa [2021-12-14 15:45:28,046 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:45:28,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c [2021-12-14 15:45:28,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac48d4a53/00c5d97ba58648f8a041c9619e11ae40/FLAGc7b86eefa [2021-12-14 15:45:28,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ac48d4a53/00c5d97ba58648f8a041c9619e11ae40 [2021-12-14 15:45:28,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:45:28,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:45:28,565 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:45:28,565 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:45:28,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:45:28,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:45:28" (1/1) ... [2021-12-14 15:45:28,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e269575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:28, skipping insertion in model container [2021-12-14 15:45:28,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:45:28" (1/1) ... [2021-12-14 15:45:28,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:45:28,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:45:30,360 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/Problem05_label46+token_ring.02.cil-2.c[382357,382370] [2021-12-14 15:45:30,381 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/Problem05_label46+token_ring.02.cil-2.c[383339,383352] [2021-12-14 15:45:30,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:45:30,536 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:45:31,265 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/Problem05_label46+token_ring.02.cil-2.c[382357,382370] [2021-12-14 15:45:31,271 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/Problem05_label46+token_ring.02.cil-2.c[383339,383352] [2021-12-14 15:45:31,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:45:31,338 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:45:31,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31 WrapperNode [2021-12-14 15:45:31,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:45:31,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:45:31,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:45:31,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:45:31,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:31,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:31,690 INFO L137 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12624 [2021-12-14 15:45:31,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:45:31,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:45:31,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:45:31,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:45:31,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:31,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:31,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:31,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:32,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:32,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:32,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:32,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:45:32,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:45:32,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:45:32,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:45:32,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (1/1) ... [2021-12-14 15:45:32,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:45:32,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:32,377 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 15:45:32,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 15:45:32,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:45:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-14 15:45:32,452 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-14 15:45:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 15:45:32,452 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 15:45:32,452 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 15:45:32,452 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 15:45:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 15:45:32,453 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 15:45:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 15:45:32,453 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 15:45:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 15:45:32,453 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 15:45:32,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:45:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 15:45:32,454 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 15:45:32,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:45:32,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:45:32,536 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:45:32,537 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:45:38,283 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:45:38,311 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:45:38,312 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-14 15:45:38,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:45:38 BoogieIcfgContainer [2021-12-14 15:45:38,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:45:38,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:45:38,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:45:38,324 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:45:38,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:45:28" (1/3) ... [2021-12-14 15:45:38,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb52a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:45:38, skipping insertion in model container [2021-12-14 15:45:38,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:45:31" (2/3) ... [2021-12-14 15:45:38,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fb52a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:45:38, skipping insertion in model container [2021-12-14 15:45:38,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:45:38" (3/3) ... [2021-12-14 15:45:38,328 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.02.cil-2.c [2021-12-14 15:45:38,332 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:45:38,333 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:45:38,398 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:45:38,406 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 15:45:38,407 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:45:38,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-14 15:45:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:45:38,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:38,475 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] [2021-12-14 15:45:38,475 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:38,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2062992276, now seen corresponding path program 1 times [2021-12-14 15:45:38,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:38,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547254354] [2021-12-14 15:45:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:38,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:38,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:38,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:38,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:38,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:38,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:38,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:45:38,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:38,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547254354] [2021-12-14 15:45:38,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547254354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:38,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:45:38,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:45:38,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739626233] [2021-12-14 15:45:38,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:38,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:45:38,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:38,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:45:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:45:38,866 INFO L87 Difference]: Start difference. First operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:39,881 INFO L93 Difference]: Finished difference Result 4824 states and 8887 transitions. [2021-12-14 15:45:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:45:39,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 69 [2021-12-14 15:45:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:39,904 INFO L225 Difference]: With dead ends: 4824 [2021-12-14 15:45:39,905 INFO L226 Difference]: Without dead ends: 2441 [2021-12-14 15:45:39,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:45:39,915 INFO L933 BasicCegarLoop]: 4249 mSDtfsCounter, 4444 mSDsluCounter, 12475 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4453 SdHoareTripleChecker+Valid, 16724 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:39,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4453 Valid, 16724 Invalid, 612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 15:45:39,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-12-14 15:45:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2376. [2021-12-14 15:45:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8340480274442539) internal successors, (4277), 2336 states have internal predecessors, (4277), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-14 15:45:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4336 transitions. [2021-12-14 15:45:40,071 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4336 transitions. Word has length 69 [2021-12-14 15:45:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:40,071 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 4336 transitions. [2021-12-14 15:45:40,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4336 transitions. [2021-12-14 15:45:40,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:45:40,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:40,075 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] [2021-12-14 15:45:40,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:45:40,076 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1960277912, now seen corresponding path program 1 times [2021-12-14 15:45:40,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:40,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124541876] [2021-12-14 15:45:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:40,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:45:40,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124541876] [2021-12-14 15:45:40,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124541876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:40,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:45:40,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:45:40,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192548338] [2021-12-14 15:45:40,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:40,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:45:40,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:40,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:45:40,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:45:40,255 INFO L87 Difference]: Start difference. First operand 2376 states and 4336 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:40,777 INFO L93 Difference]: Finished difference Result 2686 states and 4809 transitions. [2021-12-14 15:45:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:45:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-14 15:45:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:40,791 INFO L225 Difference]: With dead ends: 2686 [2021-12-14 15:45:40,792 INFO L226 Difference]: Without dead ends: 2441 [2021-12-14 15:45:40,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:45:40,799 INFO L933 BasicCegarLoop]: 4142 mSDtfsCounter, 4269 mSDsluCounter, 16164 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4279 SdHoareTripleChecker+Valid, 20306 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:40,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4279 Valid, 20306 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 15:45:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-12-14 15:45:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2376. [2021-12-14 15:45:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8331903945111492) internal successors, (4275), 2336 states have internal predecessors, (4275), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2021-12-14 15:45:40,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4334 transitions. [2021-12-14 15:45:40,878 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4334 transitions. Word has length 69 [2021-12-14 15:45:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:40,879 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 4334 transitions. [2021-12-14 15:45:40,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4334 transitions. [2021-12-14 15:45:40,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:45:40,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:40,885 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] [2021-12-14 15:45:40,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:45:40,885 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:40,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash -573492502, now seen corresponding path program 1 times [2021-12-14 15:45:40,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:40,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364922993] [2021-12-14 15:45:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:40,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:40,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:45:41,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:41,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364922993] [2021-12-14 15:45:41,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364922993] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:41,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:45:41,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:45:41,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658173776] [2021-12-14 15:45:41,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:41,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:45:41,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:45:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:45:41,019 INFO L87 Difference]: Start difference. First operand 2376 states and 4334 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:41,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:41,718 INFO L93 Difference]: Finished difference Result 2834 states and 5016 transitions. [2021-12-14 15:45:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:45:41,719 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-14 15:45:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:41,730 INFO L225 Difference]: With dead ends: 2834 [2021-12-14 15:45:41,730 INFO L226 Difference]: Without dead ends: 2589 [2021-12-14 15:45:41,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:45:41,733 INFO L933 BasicCegarLoop]: 4190 mSDtfsCounter, 4387 mSDsluCounter, 16343 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4396 SdHoareTripleChecker+Valid, 20533 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:41,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4396 Valid, 20533 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:45:41,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-12-14 15:45:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2490. [2021-12-14 15:45:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2428 states have (on average 1.8187808896210873) internal successors, (4416), 2433 states have internal predecessors, (4416), 40 states have call successors, (40), 19 states have call predecessors, (40), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2021-12-14 15:45:41,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 4499 transitions. [2021-12-14 15:45:41,804 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 4499 transitions. Word has length 69 [2021-12-14 15:45:41,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:41,805 INFO L470 AbstractCegarLoop]: Abstraction has 2490 states and 4499 transitions. [2021-12-14 15:45:41,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:41,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 4499 transitions. [2021-12-14 15:45:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:45:41,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:41,806 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] [2021-12-14 15:45:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:45:41,807 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash 302526504, now seen corresponding path program 1 times [2021-12-14 15:45:41,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:41,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564860048] [2021-12-14 15:45:41,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:41,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:45:41,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:41,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564860048] [2021-12-14 15:45:41,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564860048] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:41,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:45:41,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:45:41,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989571292] [2021-12-14 15:45:41,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:41,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:45:41,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:45:41,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:45:41,898 INFO L87 Difference]: Start difference. First operand 2490 states and 4499 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:42,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:42,881 INFO L93 Difference]: Finished difference Result 3280 states and 5671 transitions. [2021-12-14 15:45:42,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:45:42,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-14 15:45:42,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:42,895 INFO L225 Difference]: With dead ends: 3280 [2021-12-14 15:45:42,898 INFO L226 Difference]: Without dead ends: 2921 [2021-12-14 15:45:42,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:45:42,908 INFO L933 BasicCegarLoop]: 4277 mSDtfsCounter, 4371 mSDsluCounter, 16532 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4379 SdHoareTripleChecker+Valid, 20809 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:42,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4379 Valid, 20809 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-14 15:45:42,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-12-14 15:45:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2697. [2021-12-14 15:45:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2601 states have (on average 1.794309880815071) internal successors, (4667), 2608 states have internal predecessors, (4667), 60 states have call successors, (60), 31 states have call predecessors, (60), 34 states have return successors, (71), 61 states have call predecessors, (71), 58 states have call successors, (71) [2021-12-14 15:45:43,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4798 transitions. [2021-12-14 15:45:43,012 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4798 transitions. Word has length 69 [2021-12-14 15:45:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:43,017 INFO L470 AbstractCegarLoop]: Abstraction has 2697 states and 4798 transitions. [2021-12-14 15:45:43,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:43,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4798 transitions. [2021-12-14 15:45:43,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:45:43,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:43,019 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] [2021-12-14 15:45:43,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:45:43,019 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:43,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1840866534, now seen corresponding path program 1 times [2021-12-14 15:45:43,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:43,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058433146] [2021-12-14 15:45:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:43,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:43,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:43,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:43,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:43,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:43,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:45:43,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:43,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058433146] [2021-12-14 15:45:43,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058433146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:43,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:45:43,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:45:43,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126493751] [2021-12-14 15:45:43,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:43,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:45:43,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:45:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:45:43,113 INFO L87 Difference]: Start difference. First operand 2697 states and 4798 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:43,895 INFO L93 Difference]: Finished difference Result 3979 states and 6676 transitions. [2021-12-14 15:45:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:45:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 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 69 [2021-12-14 15:45:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:43,910 INFO L225 Difference]: With dead ends: 3979 [2021-12-14 15:45:43,910 INFO L226 Difference]: Without dead ends: 3413 [2021-12-14 15:45:43,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:45:43,914 INFO L933 BasicCegarLoop]: 4246 mSDtfsCounter, 4373 mSDsluCounter, 16535 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4385 SdHoareTripleChecker+Valid, 20781 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:43,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4385 Valid, 20781 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:45:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2021-12-14 15:45:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 3126. [2021-12-14 15:45:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3126 states, 2964 states have (on average 1.75472334682861) internal successors, (5201), 2975 states have internal predecessors, (5201), 98 states have call successors, (98), 55 states have call predecessors, (98), 62 states have return successors, (131), 103 states have call predecessors, (131), 96 states have call successors, (131) [2021-12-14 15:45:44,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3126 states to 3126 states and 5430 transitions. [2021-12-14 15:45:44,041 INFO L78 Accepts]: Start accepts. Automaton has 3126 states and 5430 transitions. Word has length 69 [2021-12-14 15:45:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:44,041 INFO L470 AbstractCegarLoop]: Abstraction has 3126 states and 5430 transitions. [2021-12-14 15:45:44,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3126 states and 5430 transitions. [2021-12-14 15:45:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:45:44,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:44,044 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] [2021-12-14 15:45:44,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:45:44,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:44,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:44,045 INFO L85 PathProgramCache]: Analyzing trace with hash -187719576, now seen corresponding path program 1 times [2021-12-14 15:45:44,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:44,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192555305] [2021-12-14 15:45:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:44,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:44,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:44,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:44,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:44,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:44,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:45:44,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:44,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192555305] [2021-12-14 15:45:44,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192555305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:44,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:45:44,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:45:44,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950583298] [2021-12-14 15:45:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:44,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:45:44,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:45:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:45:44,155 INFO L87 Difference]: Start difference. First operand 3126 states and 5430 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:44,917 INFO L93 Difference]: Finished difference Result 4980 states and 8171 transitions. [2021-12-14 15:45:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:45:44,918 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 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 69 [2021-12-14 15:45:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:44,936 INFO L225 Difference]: With dead ends: 4980 [2021-12-14 15:45:44,937 INFO L226 Difference]: Without dead ends: 3986 [2021-12-14 15:45:44,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 15:45:44,943 INFO L933 BasicCegarLoop]: 4304 mSDtfsCounter, 4501 mSDsluCounter, 12283 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4527 SdHoareTripleChecker+Valid, 16587 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:44,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4527 Valid, 16587 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-14 15:45:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-12-14 15:45:45,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3655. [2021-12-14 15:45:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 3405 states have (on average 1.7101321585903084) internal successors, (5823), 3425 states have internal predecessors, (5823), 152 states have call successors, (152), 85 states have call predecessors, (152), 96 states have return successors, (195), 152 states have call predecessors, (195), 150 states have call successors, (195) [2021-12-14 15:45:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 6170 transitions. [2021-12-14 15:45:45,103 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 6170 transitions. Word has length 69 [2021-12-14 15:45:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:45,104 INFO L470 AbstractCegarLoop]: Abstraction has 3655 states and 6170 transitions. [2021-12-14 15:45:45,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:45:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 6170 transitions. [2021-12-14 15:45:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 15:45:45,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:45,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:45:45,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:45:45,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:45,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash 770021099, now seen corresponding path program 1 times [2021-12-14 15:45:45,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:45,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065632307] [2021-12-14 15:45:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:45,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:45,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:45:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:45:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:45:45,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:45,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065632307] [2021-12-14 15:45:45,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065632307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:45:45,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858477674] [2021-12-14 15:45:45,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:45,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:45,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:45,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:45:45,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:45:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:45,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:45:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:45:45,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 15:45:45,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:45:45,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858477674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:45,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:45:45,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:45:45,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862106653] [2021-12-14 15:45:45,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:45,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:45:45,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:45:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:45,586 INFO L87 Difference]: Start difference. First operand 3655 states and 6170 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:45:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:45,784 INFO L93 Difference]: Finished difference Result 6624 states and 10494 transitions. [2021-12-14 15:45:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:45:45,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-12-14 15:45:45,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:45,814 INFO L225 Difference]: With dead ends: 6624 [2021-12-14 15:45:45,814 INFO L226 Difference]: Without dead ends: 5101 [2021-12-14 15:45:45,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:45,820 INFO L933 BasicCegarLoop]: 4161 mSDtfsCounter, 4109 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4109 SdHoareTripleChecker+Valid, 4331 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:45,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4109 Valid, 4331 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:45:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-12-14 15:45:46,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 5069. [2021-12-14 15:45:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5069 states, 4595 states have (on average 1.6426550598476606) internal successors, (7548), 4632 states have internal predecessors, (7548), 282 states have call successors, (282), 167 states have call predecessors, (282), 190 states have return successors, (363), 277 states have call predecessors, (363), 280 states have call successors, (363) [2021-12-14 15:45:46,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5069 states to 5069 states and 8193 transitions. [2021-12-14 15:45:46,033 INFO L78 Accepts]: Start accepts. Automaton has 5069 states and 8193 transitions. Word has length 111 [2021-12-14 15:45:46,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:46,036 INFO L470 AbstractCegarLoop]: Abstraction has 5069 states and 8193 transitions. [2021-12-14 15:45:46,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:45:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5069 states and 8193 transitions. [2021-12-14 15:45:46,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-14 15:45:46,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:46,044 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:45:46,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 15:45:46,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:46,268 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash -122535733, now seen corresponding path program 1 times [2021-12-14 15:45:46,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:46,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516682071] [2021-12-14 15:45:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:46,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:45:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-14 15:45:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:45:46,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:46,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516682071] [2021-12-14 15:45:46,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516682071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:45:46,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325098336] [2021-12-14 15:45:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:46,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:46,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:46,402 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:45:46,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:45:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:45:46,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:45:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 15:45:46,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:45:46,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325098336] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:46,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:45:46,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:45:46,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001180865] [2021-12-14 15:45:46,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:46,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:45:46,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:45:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:46,689 INFO L87 Difference]: Start difference. First operand 5069 states and 8193 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 15:45:46,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:46,970 INFO L93 Difference]: Finished difference Result 10733 states and 16467 transitions. [2021-12-14 15:45:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:45:46,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2021-12-14 15:45:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:47,012 INFO L225 Difference]: With dead ends: 10733 [2021-12-14 15:45:47,013 INFO L226 Difference]: Without dead ends: 7797 [2021-12-14 15:45:47,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:47,026 INFO L933 BasicCegarLoop]: 4309 mSDtfsCounter, 153 mSDsluCounter, 4149 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 8458 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:47,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 8458 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:45:47,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7797 states. [2021-12-14 15:45:47,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7797 to 7797. [2021-12-14 15:45:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7797 states, 6882 states have (on average 1.568584713746004) internal successors, (10795), 6944 states have internal predecessors, (10795), 537 states have call successors, (537), 329 states have call predecessors, (537), 376 states have return successors, (786), 539 states have call predecessors, (786), 535 states have call successors, (786) [2021-12-14 15:45:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7797 states to 7797 states and 12118 transitions. [2021-12-14 15:45:47,408 INFO L78 Accepts]: Start accepts. Automaton has 7797 states and 12118 transitions. Word has length 111 [2021-12-14 15:45:47,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:47,410 INFO L470 AbstractCegarLoop]: Abstraction has 7797 states and 12118 transitions. [2021-12-14 15:45:47,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 15:45:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7797 states and 12118 transitions. [2021-12-14 15:45:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-14 15:45:47,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:47,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:45:47,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 15:45:47,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-14 15:45:47,648 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:47,648 INFO L85 PathProgramCache]: Analyzing trace with hash 327119452, now seen corresponding path program 1 times [2021-12-14 15:45:47,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:47,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566492785] [2021-12-14 15:45:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:47,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:47,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:47,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:45:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 15:45:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-14 15:45:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-14 15:45:47,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:47,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566492785] [2021-12-14 15:45:47,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566492785] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:45:47,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352036146] [2021-12-14 15:45:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:47,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:47,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:47,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:45:47,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 15:45:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:47,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:45:47,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:45:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 15:45:48,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:45:48,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352036146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:48,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:45:48,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:45:48,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893361812] [2021-12-14 15:45:48,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:48,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:45:48,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:45:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:48,188 INFO L87 Difference]: Start difference. First operand 7797 states and 12118 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 15:45:48,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:48,745 INFO L93 Difference]: Finished difference Result 18877 states and 28229 transitions. [2021-12-14 15:45:48,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:45:48,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2021-12-14 15:45:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:48,794 INFO L225 Difference]: With dead ends: 18877 [2021-12-14 15:45:48,795 INFO L226 Difference]: Without dead ends: 13217 [2021-12-14 15:45:48,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:48,815 INFO L933 BasicCegarLoop]: 4182 mSDtfsCounter, 4067 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4067 SdHoareTripleChecker+Valid, 4352 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:48,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4067 Valid, 4352 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:45:48,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13217 states. [2021-12-14 15:45:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13217 to 13101. [2021-12-14 15:45:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13101 states, 11334 states have (on average 1.5130580554085054) internal successors, (17149), 11454 states have internal predecessors, (17149), 1023 states have call successors, (1023), 647 states have call predecessors, (1023), 742 states have return successors, (1484), 1015 states have call predecessors, (1484), 1021 states have call successors, (1484) [2021-12-14 15:45:49,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13101 states to 13101 states and 19656 transitions. [2021-12-14 15:45:49,324 INFO L78 Accepts]: Start accepts. Automaton has 13101 states and 19656 transitions. Word has length 143 [2021-12-14 15:45:49,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:49,325 INFO L470 AbstractCegarLoop]: Abstraction has 13101 states and 19656 transitions. [2021-12-14 15:45:49,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-14 15:45:49,326 INFO L276 IsEmpty]: Start isEmpty. Operand 13101 states and 19656 transitions. [2021-12-14 15:45:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 15:45:49,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:49,359 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:45:49,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 15:45:49,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:49,575 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:49,576 INFO L85 PathProgramCache]: Analyzing trace with hash 382011958, now seen corresponding path program 1 times [2021-12-14 15:45:49,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:49,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503011648] [2021-12-14 15:45:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:49,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:49,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 15:45:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 15:45:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 15:45:49,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 15:45:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 15:45:49,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:49,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503011648] [2021-12-14 15:45:49,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503011648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:45:49,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925359581] [2021-12-14 15:45:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:49,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:49,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:49,697 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:45:49,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 15:45:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:49,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:45:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:45:50,101 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 15:45:50,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:45:50,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925359581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:50,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:45:50,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:45:50,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004247774] [2021-12-14 15:45:50,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:50,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:45:50,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:50,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:45:50,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:50,104 INFO L87 Difference]: Start difference. First operand 13101 states and 19656 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:45:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:50,568 INFO L93 Difference]: Finished difference Result 25341 states and 37502 transitions. [2021-12-14 15:45:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:45:50,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-14 15:45:50,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:50,627 INFO L225 Difference]: With dead ends: 25341 [2021-12-14 15:45:50,628 INFO L226 Difference]: Without dead ends: 14375 [2021-12-14 15:45:50,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:50,669 INFO L933 BasicCegarLoop]: 4148 mSDtfsCounter, 4086 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4086 SdHoareTripleChecker+Valid, 4182 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:50,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4086 Valid, 4182 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:45:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14375 states. [2021-12-14 15:45:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14375 to 14375. [2021-12-14 15:45:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14375 states, 12492 states have (on average 1.4571725904578932) internal successors, (18203), 12612 states have internal predecessors, (18203), 1053 states have call successors, (1053), 733 states have call predecessors, (1053), 828 states have return successors, (1522), 1045 states have call predecessors, (1522), 1051 states have call successors, (1522) [2021-12-14 15:45:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14375 states to 14375 states and 20778 transitions. [2021-12-14 15:45:51,319 INFO L78 Accepts]: Start accepts. Automaton has 14375 states and 20778 transitions. Word has length 160 [2021-12-14 15:45:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:51,319 INFO L470 AbstractCegarLoop]: Abstraction has 14375 states and 20778 transitions. [2021-12-14 15:45:51,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:45:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 14375 states and 20778 transitions. [2021-12-14 15:45:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-14 15:45:51,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:51,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:45:51,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 15:45:51,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:51,576 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 228383827, now seen corresponding path program 1 times [2021-12-14 15:45:51,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:51,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129165953] [2021-12-14 15:45:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:51,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 15:45:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-14 15:45:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-14 15:45:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:51,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-14 15:45:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,693 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 15:45:51,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:51,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129165953] [2021-12-14 15:45:51,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129165953] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:45:51,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696523041] [2021-12-14 15:45:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:51,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:51,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:51,696 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:45:51,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 15:45:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:45:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:45:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-14 15:45:52,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:45:52,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696523041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:52,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:45:52,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:45:52,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571620121] [2021-12-14 15:45:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:52,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:45:52,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:45:52,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:52,073 INFO L87 Difference]: Start difference. First operand 14375 states and 20778 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:45:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:52,652 INFO L93 Difference]: Finished difference Result 23728 states and 33596 transitions. [2021-12-14 15:45:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:45:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2021-12-14 15:45:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:52,716 INFO L225 Difference]: With dead ends: 23728 [2021-12-14 15:45:52,716 INFO L226 Difference]: Without dead ends: 15235 [2021-12-14 15:45:52,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:52,746 INFO L933 BasicCegarLoop]: 4170 mSDtfsCounter, 4087 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4347 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:52,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4087 Valid, 4347 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:45:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2021-12-14 15:45:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 15159. [2021-12-14 15:45:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15159 states, 13212 states have (on average 1.4319557977596125) internal successors, (18919), 13332 states have internal predecessors, (18919), 1065 states have call successors, (1065), 785 states have call predecessors, (1065), 880 states have return successors, (1586), 1057 states have call predecessors, (1586), 1063 states have call successors, (1586) [2021-12-14 15:45:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15159 states to 15159 states and 21570 transitions. [2021-12-14 15:45:53,373 INFO L78 Accepts]: Start accepts. Automaton has 15159 states and 21570 transitions. Word has length 160 [2021-12-14 15:45:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:53,374 INFO L470 AbstractCegarLoop]: Abstraction has 15159 states and 21570 transitions. [2021-12-14 15:45:53,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:45:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 15159 states and 21570 transitions. [2021-12-14 15:45:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 15:45:53,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:53,403 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:45:53,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 15:45:53,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-14 15:45:53,619 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:53,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1570525413, now seen corresponding path program 1 times [2021-12-14 15:45:53,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:53,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72270080] [2021-12-14 15:45:53,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:53,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:45:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 15:45:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 15:45:53,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:45:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 15:45:53,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:53,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72270080] [2021-12-14 15:45:53,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72270080] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:45:53,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083622915] [2021-12-14 15:45:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:53,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:53,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:53,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:45:53,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 15:45:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:53,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:45:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:45:54,076 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-14 15:45:54,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:45:54,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083622915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:54,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:45:54,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:45:54,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098857068] [2021-12-14 15:45:54,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:54,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:45:54,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:45:54,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:54,078 INFO L87 Difference]: Start difference. First operand 15159 states and 21570 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:45:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:55,032 INFO L93 Difference]: Finished difference Result 40537 states and 56372 transitions. [2021-12-14 15:45:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:45:55,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-14 15:45:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:55,146 INFO L225 Difference]: With dead ends: 40537 [2021-12-14 15:45:55,146 INFO L226 Difference]: Without dead ends: 27517 [2021-12-14 15:45:55,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:55,182 INFO L933 BasicCegarLoop]: 4318 mSDtfsCounter, 162 mSDsluCounter, 4146 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 8464 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:55,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 8464 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:45:55,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27517 states. [2021-12-14 15:45:56,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27517 to 27489. [2021-12-14 15:45:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27489 states, 23696 states have (on average 1.3850860904794058) internal successors, (32821), 23934 states have internal predecessors, (32821), 2063 states have call successors, (2063), 1537 states have call predecessors, (2063), 1728 states have return successors, (3558), 2049 states have call predecessors, (3558), 2061 states have call successors, (3558) [2021-12-14 15:45:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27489 states to 27489 states and 38442 transitions. [2021-12-14 15:45:56,207 INFO L78 Accepts]: Start accepts. Automaton has 27489 states and 38442 transitions. Word has length 161 [2021-12-14 15:45:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:56,208 INFO L470 AbstractCegarLoop]: Abstraction has 27489 states and 38442 transitions. [2021-12-14 15:45:56,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:45:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 27489 states and 38442 transitions. [2021-12-14 15:45:56,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 15:45:56,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:56,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:45:56,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 15:45:56,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:56,489 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash -948353227, now seen corresponding path program 1 times [2021-12-14 15:45:56,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:56,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904298855] [2021-12-14 15:45:56,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:56,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:45:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 15:45:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:45:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:45:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-14 15:45:56,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:56,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904298855] [2021-12-14 15:45:56,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904298855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:45:56,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784981060] [2021-12-14 15:45:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:56,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:56,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:56,612 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:45:56,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 15:45:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:56,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:45:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:45:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-14 15:45:57,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:45:57,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784981060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:57,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:45:57,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:45:57,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50684309] [2021-12-14 15:45:57,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:57,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:45:57,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:57,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:45:57,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:57,015 INFO L87 Difference]: Start difference. First operand 27489 states and 38442 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:45:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:45:58,198 INFO L93 Difference]: Finished difference Result 45781 states and 64487 transitions. [2021-12-14 15:45:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:45:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2021-12-14 15:45:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:45:58,300 INFO L225 Difference]: With dead ends: 45781 [2021-12-14 15:45:58,300 INFO L226 Difference]: Without dead ends: 24869 [2021-12-14 15:45:58,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:58,366 INFO L933 BasicCegarLoop]: 4147 mSDtfsCounter, 4081 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4081 SdHoareTripleChecker+Valid, 4180 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:45:58,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4081 Valid, 4180 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:45:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24869 states. [2021-12-14 15:45:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24869 to 19189. [2021-12-14 15:45:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19189 states, 16676 states have (on average 1.3680139122091628) internal successors, (22813), 16806 states have internal predecessors, (22813), 1375 states have call successors, (1375), 1041 states have call predecessors, (1375), 1136 states have return successors, (2154), 1357 states have call predecessors, (2154), 1373 states have call successors, (2154) [2021-12-14 15:45:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19189 states to 19189 states and 26342 transitions. [2021-12-14 15:45:59,129 INFO L78 Accepts]: Start accepts. Automaton has 19189 states and 26342 transitions. Word has length 161 [2021-12-14 15:45:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:45:59,129 INFO L470 AbstractCegarLoop]: Abstraction has 19189 states and 26342 transitions. [2021-12-14 15:45:59,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-14 15:45:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 19189 states and 26342 transitions. [2021-12-14 15:45:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 15:45:59,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:45:59,155 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:45:59,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 15:45:59,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:59,368 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:45:59,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:45:59,368 INFO L85 PathProgramCache]: Analyzing trace with hash -192882952, now seen corresponding path program 1 times [2021-12-14 15:45:59,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:45:59,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987202951] [2021-12-14 15:45:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:59,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:45:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:45:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:45:59,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:45:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:45:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:45:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 15:45:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-14 15:45:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:45:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:45:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:45:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-14 15:45:59,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:45:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987202951] [2021-12-14 15:45:59,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987202951] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:45:59,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897871343] [2021-12-14 15:45:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:45:59,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:45:59,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:45:59,479 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:45:59,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 15:45:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:45:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:45:59,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:45:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 15:45:59,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:45:59,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897871343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:45:59,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:45:59,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:45:59,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993105981] [2021-12-14 15:45:59,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:45:59,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:45:59,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:45:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:45:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:45:59,803 INFO L87 Difference]: Start difference. First operand 19189 states and 26342 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:46:00,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:46:00,889 INFO L93 Difference]: Finished difference Result 50633 states and 68394 transitions. [2021-12-14 15:46:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:46:00,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-14 15:46:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:46:01,023 INFO L225 Difference]: With dead ends: 50633 [2021-12-14 15:46:01,023 INFO L226 Difference]: Without dead ends: 33593 [2021-12-14 15:46:01,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:46:01,071 INFO L933 BasicCegarLoop]: 4312 mSDtfsCounter, 149 mSDsluCounter, 4143 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 8455 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:46:01,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 8455 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:46:01,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33593 states. [2021-12-14 15:46:02,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33593 to 33589. [2021-12-14 15:46:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33589 states, 28856 states have (on average 1.327314943166066) internal successors, (38301), 29114 states have internal predecessors, (38301), 2603 states have call successors, (2603), 1937 states have call predecessors, (2603), 2128 states have return successors, (4736), 2569 states have call predecessors, (4736), 2601 states have call successors, (4736) [2021-12-14 15:46:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33589 states to 33589 states and 45640 transitions. [2021-12-14 15:46:02,478 INFO L78 Accepts]: Start accepts. Automaton has 33589 states and 45640 transitions. Word has length 161 [2021-12-14 15:46:02,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:46:02,479 INFO L470 AbstractCegarLoop]: Abstraction has 33589 states and 45640 transitions. [2021-12-14 15:46:02,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-14 15:46:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 33589 states and 45640 transitions. [2021-12-14 15:46:02,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 15:46:02,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:46:02,518 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:46:02,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 15:46:02,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-14 15:46:02,743 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:46:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:46:02,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1491732838, now seen corresponding path program 1 times [2021-12-14 15:46:02,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:46:02,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777954655] [2021-12-14 15:46:02,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:46:02,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:46:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:46:02,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:46:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:46:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:46:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:46:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:46:02,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:46:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 15:46:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:46:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-14 15:46:02,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:46:02,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777954655] [2021-12-14 15:46:02,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777954655] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:46:02,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419897723] [2021-12-14 15:46:02,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:46:02,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:46:02,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:46:02,851 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:46:02,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 15:46:02,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:02,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:46:02,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:46:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-14 15:46:03,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:46:03,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419897723] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:46:03,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:46:03,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:46:03,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722940872] [2021-12-14 15:46:03,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:46:03,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:46:03,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:46:03,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:46:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:46:03,209 INFO L87 Difference]: Start difference. First operand 33589 states and 45640 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:46:04,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:46:04,314 INFO L93 Difference]: Finished difference Result 58387 states and 78608 transitions. [2021-12-14 15:46:04,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:46:04,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-14 15:46:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:46:04,460 INFO L225 Difference]: With dead ends: 58387 [2021-12-14 15:46:04,460 INFO L226 Difference]: Without dead ends: 34097 [2021-12-14 15:46:04,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:46:04,529 INFO L933 BasicCegarLoop]: 4185 mSDtfsCounter, 4107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 4355 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:46:04,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4107 Valid, 4355 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:46:04,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34097 states. [2021-12-14 15:46:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34097 to 33589. [2021-12-14 15:46:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33589 states, 28856 states have (on average 1.3198294981979484) internal successors, (38085), 29114 states have internal predecessors, (38085), 2603 states have call successors, (2603), 1937 states have call predecessors, (2603), 2128 states have return successors, (4736), 2569 states have call predecessors, (4736), 2601 states have call successors, (4736) [2021-12-14 15:46:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33589 states to 33589 states and 45424 transitions. [2021-12-14 15:46:05,855 INFO L78 Accepts]: Start accepts. Automaton has 33589 states and 45424 transitions. Word has length 161 [2021-12-14 15:46:05,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:46:05,855 INFO L470 AbstractCegarLoop]: Abstraction has 33589 states and 45424 transitions. [2021-12-14 15:46:05,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:46:05,856 INFO L276 IsEmpty]: Start isEmpty. Operand 33589 states and 45424 transitions. [2021-12-14 15:46:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 15:46:06,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:46:06,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:46:06,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 15:46:06,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 15:46:06,219 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:46:06,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:46:06,220 INFO L85 PathProgramCache]: Analyzing trace with hash -251057197, now seen corresponding path program 1 times [2021-12-14 15:46:06,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:46:06,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839178729] [2021-12-14 15:46:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:46:06,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:46:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:46:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:46:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:46:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:46:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:46:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:46:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:46:06,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:46:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:46:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-14 15:46:06,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:46:06,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839178729] [2021-12-14 15:46:06,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839178729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:46:06,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130688148] [2021-12-14 15:46:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:46:06,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:46:06,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:46:06,323 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:46:06,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 15:46:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:46:06,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:46:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-14 15:46:06,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:46:06,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130688148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:46:06,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:46:06,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:46:06,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131879557] [2021-12-14 15:46:06,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:46:06,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:46:06,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:46:06,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:46:06,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:46:06,682 INFO L87 Difference]: Start difference. First operand 33589 states and 45424 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:46:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:46:07,949 INFO L93 Difference]: Finished difference Result 57833 states and 77578 transitions. [2021-12-14 15:46:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:46:07,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-14 15:46:07,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:46:08,098 INFO L225 Difference]: With dead ends: 57833 [2021-12-14 15:46:08,099 INFO L226 Difference]: Without dead ends: 34385 [2021-12-14 15:46:08,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:46:08,169 INFO L933 BasicCegarLoop]: 4199 mSDtfsCounter, 4106 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4106 SdHoareTripleChecker+Valid, 4371 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:46:08,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4106 Valid, 4371 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:46:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34385 states. [2021-12-14 15:46:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34385 to 33517. [2021-12-14 15:46:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33517 states, 28784 states have (on average 1.3131253474152307) internal successors, (37797), 29042 states have internal predecessors, (37797), 2603 states have call successors, (2603), 1937 states have call predecessors, (2603), 2128 states have return successors, (4736), 2569 states have call predecessors, (4736), 2601 states have call successors, (4736) [2021-12-14 15:46:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33517 states to 33517 states and 45136 transitions. [2021-12-14 15:46:09,477 INFO L78 Accepts]: Start accepts. Automaton has 33517 states and 45136 transitions. Word has length 161 [2021-12-14 15:46:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:46:09,478 INFO L470 AbstractCegarLoop]: Abstraction has 33517 states and 45136 transitions. [2021-12-14 15:46:09,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-14 15:46:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 33517 states and 45136 transitions. [2021-12-14 15:46:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 15:46:09,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:46:09,513 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:46:09,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 15:46:09,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-14 15:46:09,739 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:46:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:46:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -2084105626, now seen corresponding path program 1 times [2021-12-14 15:46:09,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:46:09,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629922269] [2021-12-14 15:46:09,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:46:09,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:46:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:46:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:46:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:46:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:46:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:46:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:46:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:46:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 15:46:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:46:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-14 15:46:09,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:46:09,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629922269] [2021-12-14 15:46:09,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629922269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:46:09,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:46:09,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:46:09,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819577288] [2021-12-14 15:46:09,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:46:09,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:46:09,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:46:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:46:09,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:46:09,814 INFO L87 Difference]: Start difference. First operand 33517 states and 45136 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 15:46:10,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:46:10,955 INFO L93 Difference]: Finished difference Result 63727 states and 84123 transitions. [2021-12-14 15:46:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:46:10,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-12-14 15:46:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:46:11,057 INFO L225 Difference]: With dead ends: 63727 [2021-12-14 15:46:11,057 INFO L226 Difference]: Without dead ends: 32355 [2021-12-14 15:46:11,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:46:11,129 INFO L933 BasicCegarLoop]: 4146 mSDtfsCounter, 294 mSDsluCounter, 12026 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 16172 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:46:11,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 16172 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:46:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32355 states. [2021-12-14 15:46:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32355 to 30363. [2021-12-14 15:46:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30363 states, 26282 states have (on average 1.3175937904269082) internal successors, (34629), 26796 states have internal predecessors, (34629), 1983 states have call successors, (1983), 1489 states have call predecessors, (1983), 2096 states have return successors, (3933), 2093 states have call predecessors, (3933), 1981 states have call successors, (3933) [2021-12-14 15:46:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30363 states to 30363 states and 40545 transitions. [2021-12-14 15:46:12,343 INFO L78 Accepts]: Start accepts. Automaton has 30363 states and 40545 transitions. Word has length 161 [2021-12-14 15:46:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:46:12,343 INFO L470 AbstractCegarLoop]: Abstraction has 30363 states and 40545 transitions. [2021-12-14 15:46:12,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 15:46:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 30363 states and 40545 transitions. [2021-12-14 15:46:12,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-14 15:46:12,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:46:12,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:46:12,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 15:46:12,369 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:46:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:46:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash 641108433, now seen corresponding path program 1 times [2021-12-14 15:46:12,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:46:12,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372374257] [2021-12-14 15:46:12,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:46:12,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:46:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:46:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:46:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:46:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:46:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:46:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-14 15:46:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-14 15:46:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:46:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-14 15:46:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-14 15:46:12,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:46:12,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372374257] [2021-12-14 15:46:12,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372374257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:46:12,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:46:12,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:46:12,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792464050] [2021-12-14 15:46:12,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:46:12,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:46:12,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:46:12,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:46:12,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:46:12,444 INFO L87 Difference]: Start difference. First operand 30363 states and 40545 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 15:46:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:46:13,561 INFO L93 Difference]: Finished difference Result 53149 states and 69944 transitions. [2021-12-14 15:46:13,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:46:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-12-14 15:46:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:46:13,625 INFO L225 Difference]: With dead ends: 53149 [2021-12-14 15:46:13,625 INFO L226 Difference]: Without dead ends: 24923 [2021-12-14 15:46:13,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:46:13,666 INFO L933 BasicCegarLoop]: 4145 mSDtfsCounter, 294 mSDsluCounter, 12025 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 16170 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 15:46:13,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 16170 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 15:46:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24923 states. [2021-12-14 15:46:14,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24923 to 23065. [2021-12-14 15:46:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23065 states, 20082 states have (on average 1.3415496464495569) internal successors, (26941), 20442 states have internal predecessors, (26941), 1457 states have call successors, (1457), 1101 states have call predecessors, (1457), 1524 states have return successors, (2723), 1529 states have call predecessors, (2723), 1455 states have call successors, (2723) [2021-12-14 15:46:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23065 states to 23065 states and 31121 transitions. [2021-12-14 15:46:14,849 INFO L78 Accepts]: Start accepts. Automaton has 23065 states and 31121 transitions. Word has length 161 [2021-12-14 15:46:14,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:46:14,849 INFO L470 AbstractCegarLoop]: Abstraction has 23065 states and 31121 transitions. [2021-12-14 15:46:14,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 15:46:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 23065 states and 31121 transitions. [2021-12-14 15:46:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-14 15:46:14,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:46:14,865 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:46:14,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 15:46:14,866 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:46:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:46:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash -22034244, now seen corresponding path program 1 times [2021-12-14 15:46:14,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:46:14,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661890141] [2021-12-14 15:46:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:46:14,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:46:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:46:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 15:46:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-14 15:46:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-14 15:46:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-14 15:46:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 15:46:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 15:46:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:14,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-14 15:46:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:46:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-14 15:46:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-14 15:46:14,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:46:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661890141] [2021-12-14 15:46:14,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661890141] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:46:14,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752068437] [2021-12-14 15:46:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:46:14,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:46:14,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:46:14,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 15:46:14,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 15:46:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:46:15,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 15:46:15,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:46:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 15:46:15,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:46:15,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752068437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:46:15,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:46:15,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:46:15,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574192491] [2021-12-14 15:46:15,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:46:15,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:46:15,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:46:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:46:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:46:15,305 INFO L87 Difference]: Start difference. First operand 23065 states and 31121 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)