./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_ground-1.i --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/array-examples/standard_partition_ground-1.i -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 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 09:44:55,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 09:44:55,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 09:44:56,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 09:44:56,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 09:44:56,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 09:44:56,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 09:44:56,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 09:44:56,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 09:44:56,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 09:44:56,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 09:44:56,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 09:44:56,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 09:44:56,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 09:44:56,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 09:44:56,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 09:44:56,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 09:44:56,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 09:44:56,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 09:44:56,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 09:44:56,037 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 09:44:56,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 09:44:56,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 09:44:56,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 09:44:56,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 09:44:56,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 09:44:56,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 09:44:56,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 09:44:56,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 09:44:56,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 09:44:56,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 09:44:56,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 09:44:56,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 09:44:56,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 09:44:56,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 09:44:56,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 09:44:56,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 09:44:56,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 09:44:56,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 09:44:56,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 09:44:56,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 09:44:56,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 09:44:56,066 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 09:44:56,084 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 09:44:56,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 09:44:56,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 09:44:56,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 09:44:56,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 09:44:56,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 09:44:56,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 09:44:56,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 09:44:56,086 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 09:44:56,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 09:44:56,086 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 09:44:56,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 09:44:56,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 09:44:56,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 09:44:56,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 09:44:56,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 09:44:56,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 09:44:56,091 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 09:44:56,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 09:44:56,092 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 09:44:56,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 09:44:56,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 09:44:56,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 09:44:56,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 09:44:56,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:44:56,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 09:44:56,093 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 09:44:56,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 09:44:56,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 09:44:56,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 09:44:56,094 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 09:44:56,094 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 09:44:56,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 09:44:56,095 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 [2022-07-13 09:44:56,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 09:44:56,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 09:44:56,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 09:44:56,266 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 09:44:56,267 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 09:44:56,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2022-07-13 09:44:56,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61de46988/58129ff47cee419ca59c93d7e45b8e95/FLAG247a158fa [2022-07-13 09:44:56,699 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 09:44:56,699 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2022-07-13 09:44:56,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61de46988/58129ff47cee419ca59c93d7e45b8e95/FLAG247a158fa [2022-07-13 09:44:56,720 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/61de46988/58129ff47cee419ca59c93d7e45b8e95 [2022-07-13 09:44:56,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 09:44:56,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 09:44:56,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 09:44:56,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 09:44:56,726 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 09:44:56,727 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e43ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56, skipping insertion in model container [2022-07-13 09:44:56,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 09:44:56,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 09:44:56,881 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/array-examples/standard_partition_ground-1.i[860,873] [2022-07-13 09:44:56,891 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:44:56,896 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 09:44:56,905 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/array-examples/standard_partition_ground-1.i[860,873] [2022-07-13 09:44:56,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 09:44:56,918 INFO L208 MainTranslator]: Completed translation [2022-07-13 09:44:56,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56 WrapperNode [2022-07-13 09:44:56,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 09:44:56,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 09:44:56,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 09:44:56,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 09:44:56,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,951 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2022-07-13 09:44:56,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 09:44:56,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 09:44:56,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 09:44:56,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 09:44:56,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 09:44:56,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 09:44:56,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 09:44:56,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 09:44:56,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (1/1) ... [2022-07-13 09:44:56,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 09:44:57,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:44:57,020 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 09:44:57,025 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 09:44:57,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 09:44:57,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 09:44:57,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 09:44:57,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 09:44:57,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 09:44:57,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 09:44:57,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 09:44:57,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-13 09:44:57,052 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-13 09:44:57,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 09:44:57,095 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 09:44:57,096 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 09:44:57,228 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 09:44:57,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 09:44:57,233 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-13 09:44:57,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:44:57 BoogieIcfgContainer [2022-07-13 09:44:57,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 09:44:57,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 09:44:57,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 09:44:57,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 09:44:57,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:44:56" (1/3) ... [2022-07-13 09:44:57,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7531e53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:44:57, skipping insertion in model container [2022-07-13 09:44:57,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:44:56" (2/3) ... [2022-07-13 09:44:57,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7531e53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:44:57, skipping insertion in model container [2022-07-13 09:44:57,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:44:57" (3/3) ... [2022-07-13 09:44:57,250 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2022-07-13 09:44:57,274 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 09:44:57,274 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 09:44:57,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 09:44:57,309 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@4aba91c9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3763afbe [2022-07-13 09:44:57,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 09:44:57,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:44:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 09:44:57,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:44:57,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:44:57,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:44:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:44:57,320 INFO L85 PathProgramCache]: Analyzing trace with hash 25564738, now seen corresponding path program 1 times [2022-07-13 09:44:57,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:44:57,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59261178] [2022-07-13 09:44:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:44:57,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:44:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:44:57,441 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 09:44:57,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:44:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59261178] [2022-07-13 09:44:57,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59261178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:44:57,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:44:57,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 09:44:57,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153329888] [2022-07-13 09:44:57,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:44:57,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 09:44:57,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:44:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 09:44:57,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 09:44:57,480 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:57,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:44:57,500 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-07-13 09:44:57,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 09:44:57,502 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 09:44:57,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:44:57,509 INFO L225 Difference]: With dead ends: 53 [2022-07-13 09:44:57,509 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 09:44:57,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 09:44:57,515 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:44:57,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:44:57,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 09:44:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-13 09:44:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:44:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-13 09:44:57,543 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 11 [2022-07-13 09:44:57,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:44:57,544 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-13 09:44:57,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:57,545 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-07-13 09:44:57,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 09:44:57,546 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:44:57,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:44:57,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 09:44:57,546 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:44:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:44:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1555088748, now seen corresponding path program 1 times [2022-07-13 09:44:57,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:44:57,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466507762] [2022-07-13 09:44:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:44:57,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:44:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:44:57,623 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 09:44:57,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:44:57,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466507762] [2022-07-13 09:44:57,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466507762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:44:57,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:44:57,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 09:44:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646716457] [2022-07-13 09:44:57,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:44:57,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 09:44:57,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:44:57,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 09:44:57,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:44:57,628 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:44:57,668 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-07-13 09:44:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 09:44:57,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 09:44:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:44:57,670 INFO L225 Difference]: With dead ends: 51 [2022-07-13 09:44:57,670 INFO L226 Difference]: Without dead ends: 31 [2022-07-13 09:44:57,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 09:44:57,672 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:44:57,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:44:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-13 09:44:57,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-07-13 09:44:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:44:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-13 09:44:57,680 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2022-07-13 09:44:57,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:44:57,682 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-13 09:44:57,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-13 09:44:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 09:44:57,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:44:57,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:44:57,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 09:44:57,685 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:44:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:44:57,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1378811952, now seen corresponding path program 1 times [2022-07-13 09:44:57,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:44:57,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279953691] [2022-07-13 09:44:57,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:44:57,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:44:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:44:57,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:44:57,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:44:57,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279953691] [2022-07-13 09:44:57,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279953691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:44:57,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945510477] [2022-07-13 09:44:57,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:44:57,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:44:57,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:44:57,737 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 09:44:57,738 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 09:44:57,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:44:57,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 09:44:57,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:44:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:44:57,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:44:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 09:44:57,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945510477] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:44:57,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:44:57,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 09:44:57,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918459180] [2022-07-13 09:44:57,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:44:57,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 09:44:57,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:44:57,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 09:44:57,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:44:57,935 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:44:58,016 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2022-07-13 09:44:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 09:44:58,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-13 09:44:58,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:44:58,017 INFO L225 Difference]: With dead ends: 66 [2022-07-13 09:44:58,017 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 09:44:58,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 09:44:58,018 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:44:58,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 90 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:44:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 09:44:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-13 09:44:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:44:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-07-13 09:44:58,024 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2022-07-13 09:44:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:44:58,024 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-07-13 09:44:58,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:58,025 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-07-13 09:44:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 09:44:58,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:44:58,025 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:44:58,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 09:44:58,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:44:58,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:44:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:44:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1056905748, now seen corresponding path program 2 times [2022-07-13 09:44:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:44:58,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382792995] [2022-07-13 09:44:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:44:58,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:44:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:44:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 09:44:58,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:44:58,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382792995] [2022-07-13 09:44:58,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382792995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 09:44:58,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 09:44:58,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 09:44:58,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617684803] [2022-07-13 09:44:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 09:44:58,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 09:44:58,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:44:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 09:44:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:44:58,336 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:58,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:44:58,358 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2022-07-13 09:44:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 09:44:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-13 09:44:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:44:58,360 INFO L225 Difference]: With dead ends: 96 [2022-07-13 09:44:58,360 INFO L226 Difference]: Without dead ends: 81 [2022-07-13 09:44:58,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 09:44:58,361 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 09:44:58,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 09:44:58,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-13 09:44:58,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-07-13 09:44:58,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:44:58,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2022-07-13 09:44:58,371 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 35 [2022-07-13 09:44:58,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:44:58,372 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2022-07-13 09:44:58,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2022-07-13 09:44:58,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 09:44:58,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:44:58,374 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:44:58,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 09:44:58,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:44:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:44:58,375 INFO L85 PathProgramCache]: Analyzing trace with hash 748532586, now seen corresponding path program 1 times [2022-07-13 09:44:58,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:44:58,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63647455] [2022-07-13 09:44:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:44:58,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:44:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:44:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 09:44:58,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:44:58,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63647455] [2022-07-13 09:44:58,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63647455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:44:58,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176325462] [2022-07-13 09:44:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:44:58,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:44:58,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:44:58,496 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 09:44:58,502 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 09:44:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:44:58,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 09:44:58,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:44:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 09:44:58,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:44:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-13 09:44:58,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176325462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:44:58,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:44:58,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-13 09:44:58,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390272963] [2022-07-13 09:44:58,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:44:58,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 09:44:58,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:44:58,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 09:44:58,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-13 09:44:58,718 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:44:58,845 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2022-07-13 09:44:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 09:44:58,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-13 09:44:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:44:58,850 INFO L225 Difference]: With dead ends: 190 [2022-07-13 09:44:58,850 INFO L226 Difference]: Without dead ends: 144 [2022-07-13 09:44:58,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-13 09:44:58,854 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 101 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:44:58,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 159 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:44:58,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-13 09:44:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-13 09:44:58,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.3214285714285714) internal successors, (185), 140 states have internal predecessors, (185), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:44:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2022-07-13 09:44:58,869 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 35 [2022-07-13 09:44:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:44:58,869 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2022-07-13 09:44:58,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2022-07-13 09:44:58,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 09:44:58,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:44:58,876 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:44:58,893 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 09:44:59,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:44:59,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:44:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:44:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -737484630, now seen corresponding path program 2 times [2022-07-13 09:44:59,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:44:59,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509865324] [2022-07-13 09:44:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:44:59,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:44:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:44:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 09:44:59,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:44:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509865324] [2022-07-13 09:44:59,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509865324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:44:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850953473] [2022-07-13 09:44:59,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 09:44:59,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:44:59,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:44:59,242 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 09:44:59,243 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 09:44:59,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 09:44:59,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:44:59,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 09:44:59,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:44:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 09:44:59,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:44:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-13 09:44:59,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850953473] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:44:59,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:44:59,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-13 09:44:59,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925951176] [2022-07-13 09:44:59,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:44:59,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 09:44:59,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:44:59,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 09:44:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-13 09:44:59,615 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:44:59,782 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2022-07-13 09:44:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 09:44:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2022-07-13 09:44:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:44:59,784 INFO L225 Difference]: With dead ends: 370 [2022-07-13 09:44:59,784 INFO L226 Difference]: Without dead ends: 288 [2022-07-13 09:44:59,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-13 09:44:59,785 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 304 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 09:44:59,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 143 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 09:44:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-07-13 09:44:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-07-13 09:44:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 284 states have (on average 1.3274647887323943) internal successors, (377), 284 states have internal predecessors, (377), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:44:59,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 381 transitions. [2022-07-13 09:44:59,797 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 381 transitions. Word has length 71 [2022-07-13 09:44:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:44:59,798 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 381 transitions. [2022-07-13 09:44:59,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:44:59,798 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 381 transitions. [2022-07-13 09:44:59,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-13 09:44:59,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:44:59,800 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:44:59,820 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 09:45:00,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:00,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1759255338, now seen corresponding path program 3 times [2022-07-13 09:45:00,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:00,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278558317] [2022-07-13 09:45:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:00,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:00,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-13 09:45:00,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278558317] [2022-07-13 09:45:00,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278558317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:00,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239217807] [2022-07-13 09:45:00,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 09:45:00,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:00,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:00,388 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 09:45:00,389 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 09:45:41,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-07-13 09:45:41,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:45:41,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 09:45:41,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:45:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-13 09:45:42,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:45:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-13 09:45:42,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239217807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:45:42,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:45:42,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-13 09:45:42,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701724441] [2022-07-13 09:45:42,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:45:42,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 09:45:42,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:45:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 09:45:42,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 09:45:42,731 INFO L87 Difference]: Start difference. First operand 288 states and 381 transitions. Second operand has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:45:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:45:43,126 INFO L93 Difference]: Finished difference Result 730 states and 1063 transitions. [2022-07-13 09:45:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-13 09:45:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2022-07-13 09:45:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:45:43,129 INFO L225 Difference]: With dead ends: 730 [2022-07-13 09:45:43,129 INFO L226 Difference]: Without dead ends: 576 [2022-07-13 09:45:43,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 09:45:43,130 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 836 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 09:45:43,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 193 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 09:45:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-07-13 09:45:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2022-07-13 09:45:43,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 572 states have (on average 1.3304195804195804) internal successors, (761), 572 states have internal predecessors, (761), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:45:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 765 transitions. [2022-07-13 09:45:43,156 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 765 transitions. Word has length 143 [2022-07-13 09:45:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:45:43,157 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 765 transitions. [2022-07-13 09:45:43,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:45:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 765 transitions. [2022-07-13 09:45:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-07-13 09:45:43,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:45:43,162 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:45:43,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 09:45:43,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:43,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:45:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:45:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2061111338, now seen corresponding path program 4 times [2022-07-13 09:45:43,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:45:43,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845048159] [2022-07-13 09:45:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:45:43,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:45:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:45:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-07-13 09:45:44,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:45:44,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845048159] [2022-07-13 09:45:44,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845048159] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:45:44,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568256956] [2022-07-13 09:45:44,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 09:45:44,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:45:44,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:45:44,407 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 09:45:44,408 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 09:47:23,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 09:47:23,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 09:47:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-13 09:47:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 09:47:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-07-13 09:47:23,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 09:47:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2022-07-13 09:47:26,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568256956] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 09:47:26,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 09:47:26,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2022-07-13 09:47:26,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844078641] [2022-07-13 09:47:26,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 09:47:26,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-07-13 09:47:26,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 09:47:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-07-13 09:47:26,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-13 09:47:26,031 INFO L87 Difference]: Start difference. First operand 576 states and 765 transitions. Second operand has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:47:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 09:47:27,485 INFO L93 Difference]: Finished difference Result 1450 states and 2119 transitions. [2022-07-13 09:47:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-13 09:47:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2022-07-13 09:47:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 09:47:27,496 INFO L225 Difference]: With dead ends: 1450 [2022-07-13 09:47:27,496 INFO L226 Difference]: Without dead ends: 1152 [2022-07-13 09:47:27,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2022-07-13 09:47:27,499 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1758 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 09:47:27,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1758 Valid, 270 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 09:47:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-07-13 09:47:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2022-07-13 09:47:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1148 states have (on average 1.3318815331010454) internal successors, (1529), 1148 states have internal predecessors, (1529), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-13 09:47:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1533 transitions. [2022-07-13 09:47:27,518 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1533 transitions. Word has length 287 [2022-07-13 09:47:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 09:47:27,518 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1533 transitions. [2022-07-13 09:47:27,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 09:47:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1533 transitions. [2022-07-13 09:47:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2022-07-13 09:47:27,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 09:47:27,525 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 09:47:27,565 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 09:47:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:47:27,740 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 09:47:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 09:47:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash -465307094, now seen corresponding path program 5 times [2022-07-13 09:47:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 09:47:27,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235632236] [2022-07-13 09:47:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 09:47:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 09:47:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 09:47:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 26414 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2022-07-13 09:47:30,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 09:47:30,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235632236] [2022-07-13 09:47:30,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235632236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 09:47:30,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718955145] [2022-07-13 09:47:30,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 09:47:30,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 09:47:30,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 09:47:30,704 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 09:47:30,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process