./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 f4b24e32 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-?-f4b24e3 [2022-07-13 20:01:59,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 20:01:59,817 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 20:01:59,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 20:01:59,841 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 20:01:59,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 20:01:59,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 20:01:59,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 20:01:59,850 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 20:01:59,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 20:01:59,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 20:01:59,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 20:01:59,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 20:01:59,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 20:01:59,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 20:01:59,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 20:01:59,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 20:01:59,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 20:01:59,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 20:01:59,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 20:01:59,874 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 20:01:59,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 20:01:59,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 20:01:59,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 20:01:59,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 20:01:59,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 20:01:59,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 20:01:59,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 20:01:59,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 20:01:59,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 20:01:59,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 20:01:59,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 20:01:59,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 20:01:59,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 20:01:59,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 20:01:59,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 20:01:59,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 20:01:59,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 20:01:59,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 20:01:59,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 20:01:59,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 20:01:59,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 20:01:59,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 20:01:59,925 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 20:01:59,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 20:01:59,925 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 20:01:59,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 20:01:59,926 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 20:01:59,926 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 20:01:59,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 20:01:59,927 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 20:01:59,927 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 20:01:59,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 20:01:59,928 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 20:01:59,928 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 20:01:59,928 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 20:01:59,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 20:01:59,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 20:01:59,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 20:01:59,929 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 20:01:59,929 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 20:01:59,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 20:01:59,930 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 20:01:59,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 20:01:59,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 20:01:59,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 20:01:59,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 20:01:59,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:01:59,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 20:01:59,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 20:01:59,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 20:01:59,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 20:01:59,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 20:01:59,932 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 20:01:59,933 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 20:01:59,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 20:01:59,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94e951826a6b890c42a47666caa0401c27bf1b0a09941efa99a0e4bb1e9e9065 [2022-07-13 20:02:00,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 20:02:00,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 20:02:00,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 20:02:00,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 20:02:00,136 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 20:02:00,137 INFO L432 ainManager$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 [2022-07-13 20:02:00,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbf51e61e/74a25be6be064aad8e790ce36197e264/FLAGf52b5749a [2022-07-13 20:02:00,842 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 20:02:00,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label46+token_ring.02.cil-2.c [2022-07-13 20:02:00,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbf51e61e/74a25be6be064aad8e790ce36197e264/FLAGf52b5749a [2022-07-13 20:02:00,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbf51e61e/74a25be6be064aad8e790ce36197e264 [2022-07-13 20:02:00,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 20:02:00,951 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 20:02:00,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 20:02:00,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 20:02:00,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 20:02:00,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:02:00" (1/1) ... [2022-07-13 20:02:00,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b56e406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:00, skipping insertion in model container [2022-07-13 20:02:00,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 08:02:00" (1/1) ... [2022-07-13 20:02:00,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 20:02:01,097 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 20:02:02,320 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] [2022-07-13 20:02:02,336 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] [2022-07-13 20:02:02,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:02:02,435 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 20:02:03,022 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] [2022-07-13 20:02:03,026 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] [2022-07-13 20:02:03,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 20:02:03,079 INFO L208 MainTranslator]: Completed translation [2022-07-13 20:02:03,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03 WrapperNode [2022-07-13 20:02:03,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 20:02:03,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 20:02:03,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 20:02:03,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 20:02:03,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,157 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,419 INFO L137 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12624 [2022-07-13 20:02:03,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 20:02:03,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 20:02:03,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 20:02:03,420 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 20:02:03,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 20:02:03,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 20:02:03,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 20:02:03,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 20:02:03,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (1/1) ... [2022-07-13 20:02:03,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 20:02:03,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:03,821 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) [2022-07-13 20:02:03,884 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 [2022-07-13 20:02:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 20:02:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-07-13 20:02:03,913 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-07-13 20:02:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-07-13 20:02:03,913 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-07-13 20:02:03,913 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-07-13 20:02:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-07-13 20:02:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-13 20:02:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-13 20:02:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-07-13 20:02:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-07-13 20:02:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-07-13 20:02:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-07-13 20:02:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 20:02:03,915 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-07-13 20:02:03,915 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-07-13 20:02:03,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 20:02:03,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 20:02:04,058 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 20:02:04,072 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 20:02:08,956 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 20:02:08,980 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 20:02:08,980 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-13 20:02:08,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:02:08 BoogieIcfgContainer [2022-07-13 20:02:08,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 20:02:08,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 20:02:08,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 20:02:08,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 20:02:08,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 08:02:00" (1/3) ... [2022-07-13 20:02:08,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608b2341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:02:08, skipping insertion in model container [2022-07-13 20:02:08,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 08:02:03" (2/3) ... [2022-07-13 20:02:08,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608b2341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 08:02:08, skipping insertion in model container [2022-07-13 20:02:08,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 08:02:08" (3/3) ... [2022-07-13 20:02:08,995 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.02.cil-2.c [2022-07-13 20:02:09,006 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 20:02:09,007 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 20:02:09,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 20:02:09,084 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@bb68c8a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5868bf8a [2022-07-13 20:02:09,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 20:02:09,095 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) [2022-07-13 20:02:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 20:02:09,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:09,105 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:09,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:09,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:09,109 INFO L85 PathProgramCache]: Analyzing trace with hash -2062992276, now seen corresponding path program 1 times [2022-07-13 20:02:09,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:09,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085947817] [2022-07-13 20:02:09,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:09,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:09,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:09,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:09,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:09,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:09,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:02:09,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:09,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085947817] [2022-07-13 20:02:09,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085947817] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:09,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:02:09,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:02:09,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909181765] [2022-07-13 20:02:09,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:09,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:02:09,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:09,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:02:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:02:09,357 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) [2022-07-13 20:02:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:10,075 INFO L93 Difference]: Finished difference Result 4824 states and 8887 transitions. [2022-07-13 20:02:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 20:02:10,077 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 [2022-07-13 20:02:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:10,095 INFO L225 Difference]: With dead ends: 4824 [2022-07-13 20:02:10,095 INFO L226 Difference]: Without dead ends: 2441 [2022-07-13 20:02:10,104 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:10,107 INFO L413 NwaCegarLoop]: 4249 mSDtfsCounter, 4444 mSDsluCounter, 12443 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4453 SdHoareTripleChecker+Valid, 16692 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 20:02:10,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4453 Valid, 16692 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 20:02:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2022-07-13 20:02:10,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2376. [2022-07-13 20:02:10,189 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) [2022-07-13 20:02:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4336 transitions. [2022-07-13 20:02:10,198 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4336 transitions. Word has length 69 [2022-07-13 20:02:10,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:10,198 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 4336 transitions. [2022-07-13 20:02:10,198 INFO L496 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) [2022-07-13 20:02:10,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4336 transitions. [2022-07-13 20:02:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 20:02:10,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:10,201 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:10,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 20:02:10,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:10,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:10,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1960277912, now seen corresponding path program 1 times [2022-07-13 20:02:10,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:10,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296463634] [2022-07-13 20:02:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:10,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:10,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:10,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:10,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:10,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:10,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:10,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:02:10,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:10,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296463634] [2022-07-13 20:02:10,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296463634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:10,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:02:10,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 20:02:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229276951] [2022-07-13 20:02:10,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:10,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 20:02:10,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:10,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 20:02:10,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:02:10,331 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) [2022-07-13 20:02:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:11,015 INFO L93 Difference]: Finished difference Result 2838 states and 5030 transitions. [2022-07-13 20:02:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 20:02:11,016 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 [2022-07-13 20:02:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:11,025 INFO L225 Difference]: With dead ends: 2838 [2022-07-13 20:02:11,025 INFO L226 Difference]: Without dead ends: 2593 [2022-07-13 20:02:11,026 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:11,027 INFO L413 NwaCegarLoop]: 4270 mSDtfsCounter, 4365 mSDsluCounter, 16510 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4374 SdHoareTripleChecker+Valid, 20780 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 20:02:11,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4374 Valid, 20780 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 20:02:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-07-13 20:02:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2490. [2022-07-13 20:02:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2428 states have (on average 1.82001647446458) internal successors, (4419), 2433 states have internal predecessors, (4419), 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) [2022-07-13 20:02:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 4502 transitions. [2022-07-13 20:02:11,075 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 4502 transitions. Word has length 69 [2022-07-13 20:02:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:11,076 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 4502 transitions. [2022-07-13 20:02:11,076 INFO L496 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) [2022-07-13 20:02:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 4502 transitions. [2022-07-13 20:02:11,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 20:02:11,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:11,078 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:11,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 20:02:11,078 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:11,079 INFO L85 PathProgramCache]: Analyzing trace with hash -573492502, now seen corresponding path program 1 times [2022-07-13 20:02:11,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:11,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951481576] [2022-07-13 20:02:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:11,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:02:11,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:11,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951481576] [2022-07-13 20:02:11,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951481576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:11,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:02:11,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 20:02:11,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237341724] [2022-07-13 20:02:11,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:11,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 20:02:11,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 20:02:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:02:11,146 INFO L87 Difference]: Start difference. First operand 2490 states and 4502 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) [2022-07-13 20:02:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:11,851 INFO L93 Difference]: Finished difference Result 3239 states and 5624 transitions. [2022-07-13 20:02:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 20:02:11,852 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 [2022-07-13 20:02:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:11,861 INFO L225 Difference]: With dead ends: 3239 [2022-07-13 20:02:11,861 INFO L226 Difference]: Without dead ends: 2880 [2022-07-13 20:02:11,863 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:11,863 INFO L413 NwaCegarLoop]: 4181 mSDtfsCounter, 4399 mSDsluCounter, 16296 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4408 SdHoareTripleChecker+Valid, 20477 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 20:02:11,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4408 Valid, 20477 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 20:02:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2022-07-13 20:02:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2719. [2022-07-13 20:02:11,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2621 states have (on average 1.794734834032812) internal successors, (4704), 2628 states have internal predecessors, (4704), 62 states have call successors, (62), 31 states have call predecessors, (62), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2022-07-13 20:02:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4839 transitions. [2022-07-13 20:02:11,917 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4839 transitions. Word has length 69 [2022-07-13 20:02:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:11,918 INFO L495 AbstractCegarLoop]: Abstraction has 2719 states and 4839 transitions. [2022-07-13 20:02:11,918 INFO L496 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) [2022-07-13 20:02:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4839 transitions. [2022-07-13 20:02:11,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 20:02:11,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:11,920 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:11,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 20:02:11,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash 302526504, now seen corresponding path program 1 times [2022-07-13 20:02:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:11,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861761112] [2022-07-13 20:02:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:11,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:02:11,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861761112] [2022-07-13 20:02:11,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861761112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:11,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:02:11,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 20:02:11,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102791175] [2022-07-13 20:02:11,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:11,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 20:02:11,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 20:02:11,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:02:11,988 INFO L87 Difference]: Start difference. First operand 2719 states and 4839 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) [2022-07-13 20:02:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:12,765 INFO L93 Difference]: Finished difference Result 4113 states and 6915 transitions. [2022-07-13 20:02:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 20:02:12,765 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 [2022-07-13 20:02:12,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:12,776 INFO L225 Difference]: With dead ends: 4113 [2022-07-13 20:02:12,777 INFO L226 Difference]: Without dead ends: 3525 [2022-07-13 20:02:12,779 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:12,779 INFO L413 NwaCegarLoop]: 4279 mSDtfsCounter, 4371 mSDsluCounter, 16499 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4379 SdHoareTripleChecker+Valid, 20778 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 20:02:12,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4379 Valid, 20778 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 20:02:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2022-07-13 20:02:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 3131. [2022-07-13 20:02:12,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2965 states have (on average 1.7551433389544688) internal successors, (5204), 2976 states have internal predecessors, (5204), 102 states have call successors, (102), 55 states have call predecessors, (102), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2022-07-13 20:02:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5441 transitions. [2022-07-13 20:02:12,866 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5441 transitions. Word has length 69 [2022-07-13 20:02:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:12,867 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 5441 transitions. [2022-07-13 20:02:12,867 INFO L496 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) [2022-07-13 20:02:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5441 transitions. [2022-07-13 20:02:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 20:02:12,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:12,869 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:12,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 20:02:12,869 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:12,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1840866534, now seen corresponding path program 1 times [2022-07-13 20:02:12,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:12,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817834190] [2022-07-13 20:02:12,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:12,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:12,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:12,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:12,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:02:12,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:12,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817834190] [2022-07-13 20:02:12,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817834190] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:12,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:02:12,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 20:02:12,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385484595] [2022-07-13 20:02:12,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:12,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 20:02:12,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 20:02:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 20:02:12,929 INFO L87 Difference]: Start difference. First operand 3131 states and 5441 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) [2022-07-13 20:02:13,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:13,611 INFO L93 Difference]: Finished difference Result 5511 states and 8955 transitions. [2022-07-13 20:02:13,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 20:02:13,612 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 [2022-07-13 20:02:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:13,627 INFO L225 Difference]: With dead ends: 5511 [2022-07-13 20:02:13,627 INFO L226 Difference]: Without dead ends: 4511 [2022-07-13 20:02:13,631 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:13,632 INFO L413 NwaCegarLoop]: 4248 mSDtfsCounter, 4376 mSDsluCounter, 16502 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4388 SdHoareTripleChecker+Valid, 20750 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 20:02:13,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4388 Valid, 20750 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 20:02:13,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2022-07-13 20:02:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3988. [2022-07-13 20:02:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3690 states have (on average 1.7002710027100272) internal successors, (6274), 3709 states have internal predecessors, (6274), 178 states have call successors, (178), 103 states have call predecessors, (178), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2022-07-13 20:02:13,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 6725 transitions. [2022-07-13 20:02:13,734 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 6725 transitions. Word has length 69 [2022-07-13 20:02:13,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:13,735 INFO L495 AbstractCegarLoop]: Abstraction has 3988 states and 6725 transitions. [2022-07-13 20:02:13,735 INFO L496 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) [2022-07-13 20:02:13,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 6725 transitions. [2022-07-13 20:02:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 20:02:13,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:13,737 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:13,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 20:02:13,738 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:13,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash -187719576, now seen corresponding path program 1 times [2022-07-13 20:02:13,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:13,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975314316] [2022-07-13 20:02:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:13,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:13,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:13,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:13,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:13,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:13,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 20:02:13,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:13,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975314316] [2022-07-13 20:02:13,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975314316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:13,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:02:13,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 20:02:13,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979784214] [2022-07-13 20:02:13,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:13,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 20:02:13,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:13,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 20:02:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 20:02:13,843 INFO L87 Difference]: Start difference. First operand 3988 states and 6725 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) [2022-07-13 20:02:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:14,450 INFO L93 Difference]: Finished difference Result 7372 states and 11760 transitions. [2022-07-13 20:02:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 20:02:14,450 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 [2022-07-13 20:02:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:14,467 INFO L225 Difference]: With dead ends: 7372 [2022-07-13 20:02:14,468 INFO L226 Difference]: Without dead ends: 5516 [2022-07-13 20:02:14,474 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:14,475 INFO L413 NwaCegarLoop]: 4312 mSDtfsCounter, 4499 mSDsluCounter, 12269 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4524 SdHoareTripleChecker+Valid, 16581 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 20:02:14,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4524 Valid, 16581 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 20:02:14,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2022-07-13 20:02:14,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4929. [2022-07-13 20:02:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4929 states, 4473 states have (on average 1.6492287055667338) internal successors, (7377), 4509 states have internal predecessors, (7377), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2022-07-13 20:02:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4929 states to 4929 states and 8048 transitions. [2022-07-13 20:02:14,594 INFO L78 Accepts]: Start accepts. Automaton has 4929 states and 8048 transitions. Word has length 69 [2022-07-13 20:02:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:14,594 INFO L495 AbstractCegarLoop]: Abstraction has 4929 states and 8048 transitions. [2022-07-13 20:02:14,595 INFO L496 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) [2022-07-13 20:02:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 4929 states and 8048 transitions. [2022-07-13 20:02:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-13 20:02:14,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:14,600 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:14,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 20:02:14,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:14,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:14,601 INFO L85 PathProgramCache]: Analyzing trace with hash 770021099, now seen corresponding path program 1 times [2022-07-13 20:02:14,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:14,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683232096] [2022-07-13 20:02:14,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:14,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:14,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 20:02:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 20:02:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 20:02:14,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683232096] [2022-07-13 20:02:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683232096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160320168] [2022-07-13 20:02:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:14,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:14,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:14,690 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) [2022-07-13 20:02:14,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 20:02:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:14,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 20:02:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 20:02:14,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:14,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160320168] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:14,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:14,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 20:02:14,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660362894] [2022-07-13 20:02:14,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:14,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:14,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:14,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:14,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:14,865 INFO L87 Difference]: Start difference. First operand 4929 states and 8048 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) [2022-07-13 20:02:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:15,012 INFO L93 Difference]: Finished difference Result 10380 states and 16066 transitions. [2022-07-13 20:02:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:15,018 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 [2022-07-13 20:02:15,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:15,043 INFO L225 Difference]: With dead ends: 10380 [2022-07-13 20:02:15,046 INFO L226 Difference]: Without dead ends: 7583 [2022-07-13 20:02:15,056 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:15,057 INFO L413 NwaCegarLoop]: 4162 mSDtfsCounter, 4110 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4333 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 [2022-07-13 20:02:15,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4110 Valid, 4333 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:15,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2022-07-13 20:02:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 7527. [2022-07-13 20:02:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 6657 states have (on average 1.5841970857743728) internal successors, (10546), 6726 states have internal predecessors, (10546), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2022-07-13 20:02:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 11803 transitions. [2022-07-13 20:02:15,353 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 11803 transitions. Word has length 111 [2022-07-13 20:02:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:15,354 INFO L495 AbstractCegarLoop]: Abstraction has 7527 states and 11803 transitions. [2022-07-13 20:02:15,354 INFO L496 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) [2022-07-13 20:02:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 11803 transitions. [2022-07-13 20:02:15,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-13 20:02:15,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:15,361 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:15,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:15,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:15,567 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:15,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:15,568 INFO L85 PathProgramCache]: Analyzing trace with hash -122535733, now seen corresponding path program 1 times [2022-07-13 20:02:15,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:15,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757500554] [2022-07-13 20:02:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:15,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 20:02:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 20:02:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 20:02:15,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:15,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757500554] [2022-07-13 20:02:15,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757500554] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:15,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355087326] [2022-07-13 20:02:15,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:15,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:15,648 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) [2022-07-13 20:02:15,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 20:02:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:15,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 20:02:15,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 20:02:15,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:15,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355087326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:15,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:15,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 20:02:15,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588134462] [2022-07-13 20:02:15,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:15,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:15,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:15,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:15,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:15,752 INFO L87 Difference]: Start difference. First operand 7527 states and 11803 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) [2022-07-13 20:02:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:16,048 INFO L93 Difference]: Finished difference Result 17935 states and 27159 transitions. [2022-07-13 20:02:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:16,048 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 [2022-07-13 20:02:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:16,107 INFO L225 Difference]: With dead ends: 17935 [2022-07-13 20:02:16,108 INFO L226 Difference]: Without dead ends: 12541 [2022-07-13 20:02:16,124 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:16,127 INFO L413 NwaCegarLoop]: 4311 mSDtfsCounter, 154 mSDsluCounter, 4150 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8461 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 [2022-07-13 20:02:16,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 8461 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2022-07-13 20:02:16,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 12541. [2022-07-13 20:02:16,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 10858 states have (on average 1.5209983422361393) internal successors, (16515), 10976 states have internal predecessors, (16515), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2022-07-13 20:02:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 19088 transitions. [2022-07-13 20:02:16,616 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 19088 transitions. Word has length 111 [2022-07-13 20:02:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:16,618 INFO L495 AbstractCegarLoop]: Abstraction has 12541 states and 19088 transitions. [2022-07-13 20:02:16,619 INFO L496 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) [2022-07-13 20:02:16,619 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 19088 transitions. [2022-07-13 20:02:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-13 20:02:16,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:16,654 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:16,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:16,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-13 20:02:16,868 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:16,868 INFO L85 PathProgramCache]: Analyzing trace with hash 327119452, now seen corresponding path program 1 times [2022-07-13 20:02:16,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:16,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135394886] [2022-07-13 20:02:16,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:16,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:16,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 20:02:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-13 20:02:16,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-13 20:02:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 20:02:16,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:16,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135394886] [2022-07-13 20:02:16,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135394886] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:16,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019805740] [2022-07-13 20:02:16,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:16,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:16,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:16,952 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) [2022-07-13 20:02:16,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 20:02:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 20:02:17,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 20:02:17,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:17,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019805740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:17,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:17,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-13 20:02:17,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318927556] [2022-07-13 20:02:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:17,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:17,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:17,173 INFO L87 Difference]: Start difference. First operand 12541 states and 19088 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) [2022-07-13 20:02:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:17,761 INFO L93 Difference]: Finished difference Result 32917 states and 49009 transitions. [2022-07-13 20:02:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:17,762 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 [2022-07-13 20:02:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:17,835 INFO L225 Difference]: With dead ends: 32917 [2022-07-13 20:02:17,835 INFO L226 Difference]: Without dead ends: 22513 [2022-07-13 20:02:17,869 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:17,869 INFO L413 NwaCegarLoop]: 4183 mSDtfsCounter, 4068 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4068 SdHoareTripleChecker+Valid, 4354 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 [2022-07-13 20:02:17,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4068 Valid, 4354 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22513 states. [2022-07-13 20:02:18,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22513 to 22301. [2022-07-13 20:02:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22301 states, 19038 states have (on average 1.4810904506775922) internal successors, (28197), 19270 states have internal predecessors, (28197), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2022-07-13 20:02:18,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22301 states to 22301 states and 33106 transitions. [2022-07-13 20:02:18,807 INFO L78 Accepts]: Start accepts. Automaton has 22301 states and 33106 transitions. Word has length 143 [2022-07-13 20:02:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:18,809 INFO L495 AbstractCegarLoop]: Abstraction has 22301 states and 33106 transitions. [2022-07-13 20:02:18,809 INFO L496 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) [2022-07-13 20:02:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 22301 states and 33106 transitions. [2022-07-13 20:02:18,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-13 20:02:18,861 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:18,861 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:18,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:19,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:19,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:19,068 INFO L85 PathProgramCache]: Analyzing trace with hash 382011958, now seen corresponding path program 1 times [2022-07-13 20:02:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:19,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796839300] [2022-07-13 20:02:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:19,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 20:02:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-13 20:02:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-13 20:02:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-13 20:02:19,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 20:02:19,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:19,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796839300] [2022-07-13 20:02:19,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796839300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:19,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720238208] [2022-07-13 20:02:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:19,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:19,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:19,162 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) [2022-07-13 20:02:19,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 20:02:19,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:19,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 20:02:19,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 20:02:19,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:19,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720238208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:19,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:19,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 20:02:19,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337072878] [2022-07-13 20:02:19,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:19,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:19,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:19,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:19,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:19,354 INFO L87 Difference]: Start difference. First operand 22301 states and 33106 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) [2022-07-13 20:02:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:19,934 INFO L93 Difference]: Finished difference Result 44821 states and 66508 transitions. [2022-07-13 20:02:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:19,935 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 [2022-07-13 20:02:19,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:20,015 INFO L225 Difference]: With dead ends: 44821 [2022-07-13 20:02:20,016 INFO L226 Difference]: Without dead ends: 24655 [2022-07-13 20:02:20,067 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:20,068 INFO L413 NwaCegarLoop]: 4149 mSDtfsCounter, 4087 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4183 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 [2022-07-13 20:02:20,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4087 Valid, 4183 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:20,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24655 states. [2022-07-13 20:02:20,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24655 to 24655. [2022-07-13 20:02:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 21180 states have (on average 1.4241265344664777) internal successors, (30163), 21412 states have internal predecessors, (30163), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2022-07-13 20:02:20,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 35194 transitions. [2022-07-13 20:02:20,938 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 35194 transitions. Word has length 160 [2022-07-13 20:02:20,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:20,938 INFO L495 AbstractCegarLoop]: Abstraction has 24655 states and 35194 transitions. [2022-07-13 20:02:20,938 INFO L496 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) [2022-07-13 20:02:20,938 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 35194 transitions. [2022-07-13 20:02:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-13 20:02:20,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:20,987 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:21,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:21,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:21,203 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:21,204 INFO L85 PathProgramCache]: Analyzing trace with hash 228383827, now seen corresponding path program 1 times [2022-07-13 20:02:21,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912528322] [2022-07-13 20:02:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:21,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 20:02:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-13 20:02:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-13 20:02:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-13 20:02:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 20:02:21,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:21,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912528322] [2022-07-13 20:02:21,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912528322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:21,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976976165] [2022-07-13 20:02:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:21,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:21,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:21,301 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) [2022-07-13 20:02:21,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 20:02:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:21,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 20:02:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-13 20:02:21,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:21,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976976165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:21,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:21,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 20:02:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089574160] [2022-07-13 20:02:21,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:21,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:21,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:21,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:21,433 INFO L87 Difference]: Start difference. First operand 24655 states and 35194 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) [2022-07-13 20:02:22,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:22,228 INFO L93 Difference]: Finished difference Result 41688 states and 58732 transitions. [2022-07-13 20:02:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:22,229 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 [2022-07-13 20:02:22,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:22,305 INFO L225 Difference]: With dead ends: 41688 [2022-07-13 20:02:22,305 INFO L226 Difference]: Without dead ends: 26195 [2022-07-13 20:02:22,338 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:22,339 INFO L413 NwaCegarLoop]: 4171 mSDtfsCounter, 4088 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4349 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 [2022-07-13 20:02:22,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4088 Valid, 4349 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:22,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26195 states. [2022-07-13 20:02:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26195 to 26055. [2022-07-13 20:02:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26055 states, 22468 states have (on average 1.3989229125867901) internal successors, (31431), 22700 states have internal predecessors, (31431), 1945 states have call successors, (1945), 1449 states have call predecessors, (1945), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2022-07-13 20:02:23,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26055 states to 26055 states and 36594 transitions. [2022-07-13 20:02:23,412 INFO L78 Accepts]: Start accepts. Automaton has 26055 states and 36594 transitions. Word has length 160 [2022-07-13 20:02:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:23,412 INFO L495 AbstractCegarLoop]: Abstraction has 26055 states and 36594 transitions. [2022-07-13 20:02:23,412 INFO L496 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) [2022-07-13 20:02:23,413 INFO L276 IsEmpty]: Start isEmpty. Operand 26055 states and 36594 transitions. [2022-07-13 20:02:23,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-13 20:02:23,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:23,444 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:23,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:23,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 20:02:23,652 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:23,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1570525413, now seen corresponding path program 1 times [2022-07-13 20:02:23,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:23,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328106595] [2022-07-13 20:02:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:23,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 20:02:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-13 20:02:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-13 20:02:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-13 20:02:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 20:02:23,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:23,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328106595] [2022-07-13 20:02:23,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328106595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:23,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294987512] [2022-07-13 20:02:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:23,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:23,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:23,740 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) [2022-07-13 20:02:23,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 20:02:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:23,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 20:02:23,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-13 20:02:23,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:23,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294987512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:23,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:23,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 20:02:23,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095606797] [2022-07-13 20:02:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:23,854 INFO L87 Difference]: Start difference. First operand 26055 states and 36594 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) [2022-07-13 20:02:25,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:25,023 INFO L93 Difference]: Finished difference Result 72665 states and 101108 transitions. [2022-07-13 20:02:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:25,023 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 [2022-07-13 20:02:25,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:25,165 INFO L225 Difference]: With dead ends: 72665 [2022-07-13 20:02:25,165 INFO L226 Difference]: Without dead ends: 48749 [2022-07-13 20:02:25,220 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:25,220 INFO L413 NwaCegarLoop]: 4320 mSDtfsCounter, 163 mSDsluCounter, 4147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 8467 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 [2022-07-13 20:02:25,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 8467 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:25,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48749 states. [2022-07-13 20:02:27,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48749 to 48705. [2022-07-13 20:02:27,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48705 states, 41704 states have (on average 1.3657442931133703) internal successors, (56957), 42166 states have internal predecessors, (56957), 3775 states have call successors, (3775), 2841 states have call predecessors, (3775), 3224 states have return successors, (7134), 3761 states have call predecessors, (7134), 3773 states have call successors, (7134) [2022-07-13 20:02:27,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48705 states to 48705 states and 67866 transitions. [2022-07-13 20:02:27,251 INFO L78 Accepts]: Start accepts. Automaton has 48705 states and 67866 transitions. Word has length 161 [2022-07-13 20:02:27,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:27,251 INFO L495 AbstractCegarLoop]: Abstraction has 48705 states and 67866 transitions. [2022-07-13 20:02:27,252 INFO L496 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) [2022-07-13 20:02:27,252 INFO L276 IsEmpty]: Start isEmpty. Operand 48705 states and 67866 transitions. [2022-07-13 20:02:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-13 20:02:27,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:27,322 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:27,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:27,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:27,535 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:27,536 INFO L85 PathProgramCache]: Analyzing trace with hash -948353227, now seen corresponding path program 1 times [2022-07-13 20:02:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589315219] [2022-07-13 20:02:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:27,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 20:02:27,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-13 20:02:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-13 20:02:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-13 20:02:27,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-07-13 20:02:27,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:27,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589315219] [2022-07-13 20:02:27,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589315219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:27,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238118335] [2022-07-13 20:02:27,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:27,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:27,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:27,612 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) [2022-07-13 20:02:27,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 20:02:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:27,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 20:02:27,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 20:02:27,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:27,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238118335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:27,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:27,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 20:02:27,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828123823] [2022-07-13 20:02:27,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:27,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:27,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:27,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:27,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:27,790 INFO L87 Difference]: Start difference. First operand 48705 states and 67866 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) [2022-07-13 20:02:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:29,223 INFO L93 Difference]: Finished difference Result 79069 states and 111521 transitions. [2022-07-13 20:02:29,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:29,223 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 [2022-07-13 20:02:29,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:29,413 INFO L225 Difference]: With dead ends: 79069 [2022-07-13 20:02:29,414 INFO L226 Difference]: Without dead ends: 41521 [2022-07-13 20:02:29,482 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:29,482 INFO L413 NwaCegarLoop]: 4148 mSDtfsCounter, 4082 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4082 SdHoareTripleChecker+Valid, 4181 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 [2022-07-13 20:02:29,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4082 Valid, 4181 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:29,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41521 states. [2022-07-13 20:02:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41521 to 30305. [2022-07-13 20:02:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30305 states, 26128 states have (on average 1.3429654011022658) internal successors, (35089), 26370 states have internal predecessors, (35089), 2255 states have call successors, (2255), 1729 states have call predecessors, (2255), 1920 states have return successors, (3778), 2237 states have call predecessors, (3778), 2253 states have call successors, (3778) [2022-07-13 20:02:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30305 states to 30305 states and 41122 transitions. [2022-07-13 20:02:31,020 INFO L78 Accepts]: Start accepts. Automaton has 30305 states and 41122 transitions. Word has length 161 [2022-07-13 20:02:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:31,020 INFO L495 AbstractCegarLoop]: Abstraction has 30305 states and 41122 transitions. [2022-07-13 20:02:31,020 INFO L496 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) [2022-07-13 20:02:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 30305 states and 41122 transitions. [2022-07-13 20:02:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-13 20:02:31,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:31,055 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:31,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:31,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:31,271 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:31,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash -192882952, now seen corresponding path program 1 times [2022-07-13 20:02:31,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:31,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435870977] [2022-07-13 20:02:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:31,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:31,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 20:02:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-07-13 20:02:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-13 20:02:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-13 20:02:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 20:02:31,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435870977] [2022-07-13 20:02:31,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435870977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:31,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72495719] [2022-07-13 20:02:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:31,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:31,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:31,336 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) [2022-07-13 20:02:31,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 20:02:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 20:02:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-13 20:02:31,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:31,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72495719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:31,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:31,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 20:02:31,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066290885] [2022-07-13 20:02:31,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:31,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:31,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:31,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:31,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:31,443 INFO L87 Difference]: Start difference. First operand 30305 states and 41122 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) [2022-07-13 20:02:33,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:33,162 INFO L93 Difference]: Finished difference Result 82213 states and 110894 transitions. [2022-07-13 20:02:33,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:33,163 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 [2022-07-13 20:02:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:33,311 INFO L225 Difference]: With dead ends: 82213 [2022-07-13 20:02:33,312 INFO L226 Difference]: Without dead ends: 54057 [2022-07-13 20:02:33,364 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:33,364 INFO L413 NwaCegarLoop]: 4314 mSDtfsCounter, 150 mSDsluCounter, 4144 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 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 [2022-07-13 20:02:33,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 8458 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54057 states. [2022-07-13 20:02:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54057 to 54053. [2022-07-13 20:02:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54053 states, 46184 states have (on average 1.3125974363415902) internal successors, (60621), 46666 states have internal predecessors, (60621), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2022-07-13 20:02:35,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54053 states to 54053 states and 73088 transitions. [2022-07-13 20:02:35,619 INFO L78 Accepts]: Start accepts. Automaton has 54053 states and 73088 transitions. Word has length 161 [2022-07-13 20:02:35,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:35,620 INFO L495 AbstractCegarLoop]: Abstraction has 54053 states and 73088 transitions. [2022-07-13 20:02:35,620 INFO L496 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) [2022-07-13 20:02:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 54053 states and 73088 transitions. [2022-07-13 20:02:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-13 20:02:35,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:35,676 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:35,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:35,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 20:02:35,878 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:35,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1491732838, now seen corresponding path program 1 times [2022-07-13 20:02:35,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:35,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439469676] [2022-07-13 20:02:35,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:35,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:35,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:35,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 20:02:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-13 20:02:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-13 20:02:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-13 20:02:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-13 20:02:35,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:35,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439469676] [2022-07-13 20:02:35,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439469676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82315151] [2022-07-13 20:02:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:35,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:35,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:35,967 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) [2022-07-13 20:02:35,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 20:02:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:36,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 20:02:36,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-13 20:02:36,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:36,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82315151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:36,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:36,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 20:02:36,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594056859] [2022-07-13 20:02:36,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:36,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:36,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:36,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:36,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:36,091 INFO L87 Difference]: Start difference. First operand 54053 states and 73088 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) [2022-07-13 20:02:38,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:38,101 INFO L93 Difference]: Finished difference Result 95015 states and 127828 transitions. [2022-07-13 20:02:38,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:38,102 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 [2022-07-13 20:02:38,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:38,270 INFO L225 Difference]: With dead ends: 95015 [2022-07-13 20:02:38,270 INFO L226 Difference]: Without dead ends: 54897 [2022-07-13 20:02:38,346 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:38,346 INFO L413 NwaCegarLoop]: 4186 mSDtfsCounter, 4108 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4108 SdHoareTripleChecker+Valid, 4357 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 [2022-07-13 20:02:38,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4108 Valid, 4357 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54897 states. [2022-07-13 20:02:40,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54897 to 54053. [2022-07-13 20:02:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54053 states, 46184 states have (on average 1.3048025290143772) internal successors, (60261), 46666 states have internal predecessors, (60261), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2022-07-13 20:02:40,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54053 states to 54053 states and 72728 transitions. [2022-07-13 20:02:40,735 INFO L78 Accepts]: Start accepts. Automaton has 54053 states and 72728 transitions. Word has length 161 [2022-07-13 20:02:40,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:40,736 INFO L495 AbstractCegarLoop]: Abstraction has 54053 states and 72728 transitions. [2022-07-13 20:02:40,736 INFO L496 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) [2022-07-13 20:02:40,736 INFO L276 IsEmpty]: Start isEmpty. Operand 54053 states and 72728 transitions. [2022-07-13 20:02:40,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-13 20:02:40,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:40,803 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:40,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:41,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 20:02:41,006 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash -251057197, now seen corresponding path program 1 times [2022-07-13 20:02:41,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644905844] [2022-07-13 20:02:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 20:02:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-13 20:02:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-13 20:02:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-13 20:02:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-13 20:02:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:41,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644905844] [2022-07-13 20:02:41,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644905844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 20:02:41,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331431953] [2022-07-13 20:02:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:41,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 20:02:41,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 20:02:41,084 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) [2022-07-13 20:02:41,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 20:02:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:41,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 20:02:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 20:02:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 20:02:41,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 20:02:41,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331431953] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:41,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 20:02:41,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-13 20:02:41,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971319071] [2022-07-13 20:02:41,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:41,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 20:02:41,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 20:02:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-13 20:02:41,212 INFO L87 Difference]: Start difference. First operand 54053 states and 72728 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) [2022-07-13 20:02:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:43,361 INFO L93 Difference]: Finished difference Result 94725 states and 126938 transitions. [2022-07-13 20:02:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 20:02:43,361 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 [2022-07-13 20:02:43,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:43,512 INFO L225 Difference]: With dead ends: 94725 [2022-07-13 20:02:43,513 INFO L226 Difference]: Without dead ends: 55449 [2022-07-13 20:02:43,573 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:43,573 INFO L413 NwaCegarLoop]: 4200 mSDtfsCounter, 4107 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 4373 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 [2022-07-13 20:02:43,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4107 Valid, 4373 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 20:02:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55449 states. [2022-07-13 20:02:45,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55449 to 53933. [2022-07-13 20:02:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53933 states, 46064 states have (on average 1.2977813476901703) internal successors, (59781), 46546 states have internal predecessors, (59781), 4267 states have call successors, (4267), 3217 states have call predecessors, (4267), 3600 states have return successors, (8200), 4233 states have call predecessors, (8200), 4265 states have call successors, (8200) [2022-07-13 20:02:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53933 states to 53933 states and 72248 transitions. [2022-07-13 20:02:45,900 INFO L78 Accepts]: Start accepts. Automaton has 53933 states and 72248 transitions. Word has length 161 [2022-07-13 20:02:45,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 20:02:45,901 INFO L495 AbstractCegarLoop]: Abstraction has 53933 states and 72248 transitions. [2022-07-13 20:02:45,901 INFO L496 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) [2022-07-13 20:02:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 53933 states and 72248 transitions. [2022-07-13 20:02:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-07-13 20:02:45,964 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 20:02:45,965 INFO L195 NwaCegarLoop]: 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] [2022-07-13 20:02:45,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 20:02:46,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 20:02:46,172 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 20:02:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 20:02:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2084105626, now seen corresponding path program 1 times [2022-07-13 20:02:46,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 20:02:46,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606160193] [2022-07-13 20:02:46,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 20:02:46,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 20:02:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 20:02:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 20:02:46,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 20:02:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-13 20:02:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-13 20:02:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-07-13 20:02:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-13 20:02:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-13 20:02:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-13 20:02:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-07-13 20:02:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 20:02:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-13 20:02:46,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 20:02:46,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606160193] [2022-07-13 20:02:46,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606160193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 20:02:46,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 20:02:46,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 20:02:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909751258] [2022-07-13 20:02:46,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 20:02:46,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 20:02:46,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 20:02:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 20:02:46,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 20:02:46,239 INFO L87 Difference]: Start difference. First operand 53933 states and 72248 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) [2022-07-13 20:02:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 20:02:48,413 INFO L93 Difference]: Finished difference Result 103313 states and 136251 transitions. [2022-07-13 20:02:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 20:02:48,413 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 [2022-07-13 20:02:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 20:02:48,537 INFO L225 Difference]: With dead ends: 103313 [2022-07-13 20:02:48,537 INFO L226 Difference]: Without dead ends: 51525 [2022-07-13 20:02:48,602 INFO L412 NwaCegarLoop]: 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 [2022-07-13 20:02:48,603 INFO L413 NwaCegarLoop]: 4148 mSDtfsCounter, 296 mSDsluCounter, 12019 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 16167 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 20:02:48,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 16167 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 20:02:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51525 states.