./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_original_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_original_ground.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 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:45:11,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:45:11,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:45:11,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:45:11,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:45:11,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:45:11,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:45:11,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:45:11,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:45:11,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:45:11,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:45:11,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:45:11,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:45:11,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:45:11,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:45:11,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:45:11,978 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:45:11,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:45:11,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:45:11,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:45:11,988 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:45:11,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:45:11,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:45:11,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:45:11,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:45:11,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:45:11,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:45:11,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:45:12,000 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:45:12,000 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:45:12,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:45:12,002 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:45:12,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:45:12,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:45:12,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:45:12,006 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:45:12,006 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:45:12,007 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:45:12,007 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:45:12,007 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:45:12,008 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:45:12,009 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:45:12,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:45:12,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:45:12,041 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:45:12,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:45:12,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:45:12,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:45:12,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:45:12,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:45:12,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:45:12,044 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:45:12,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:45:12,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:45:12,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:45:12,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:45:12,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:45:12,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:45:12,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:45:12,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:45:12,046 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:45:12,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:45:12,047 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:45:12,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:45:12,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:45:12,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:45:12,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:45:12,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:45:12,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:45:12,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:45:12,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:45:12,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:45:12,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:45:12,056 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:45:12,056 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:45:12,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:45:12,056 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 [2022-07-20 20:45:12,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:45:12,305 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:45:12,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:45:12,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:45:12,309 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:45:12,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2022-07-20 20:45:12,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1668c5f44/d844d808958c4ad0a2b3bb7a84a7cfba/FLAGdd9914835 [2022-07-20 20:45:12,773 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:45:12,774 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2022-07-20 20:45:12,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1668c5f44/d844d808958c4ad0a2b3bb7a84a7cfba/FLAGdd9914835 [2022-07-20 20:45:12,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1668c5f44/d844d808958c4ad0a2b3bb7a84a7cfba [2022-07-20 20:45:12,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:45:12,798 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:45:12,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:45:12,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:45:12,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:45:12,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:12,803 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29522a5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12, skipping insertion in model container [2022-07-20 20:45:12,803 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:12,808 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:45:12,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:45:12,933 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_original_ground.i[827,840] [2022-07-20 20:45:12,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:45:12,952 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:45:12,963 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_original_ground.i[827,840] [2022-07-20 20:45:12,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:45:12,979 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:45:12,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12 WrapperNode [2022-07-20 20:45:12,980 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:45:12,981 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:45:12,981 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:45:12,981 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:45:12,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,019 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-07-20 20:45:13,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:45:13,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:45:13,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:45:13,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:45:13,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,053 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:45:13,054 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:45:13,054 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:45:13,054 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:45:13,055 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (1/1) ... [2022-07-20 20:45:13,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:45:13,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:13,084 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) [2022-07-20 20:45:13,086 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 [2022-07-20 20:45:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:45:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:45:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:45:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:45:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:45:13,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:45:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:45:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-20 20:45:13,114 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-20 20:45:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:45:13,167 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:45:13,169 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:45:13,332 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:45:13,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:45:13,342 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-20 20:45:13,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:45:13 BoogieIcfgContainer [2022-07-20 20:45:13,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:45:13,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:45:13,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:45:13,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:45:13,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:45:12" (1/3) ... [2022-07-20 20:45:13,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbd4a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:45:13, skipping insertion in model container [2022-07-20 20:45:13,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:45:12" (2/3) ... [2022-07-20 20:45:13,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbd4a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:45:13, skipping insertion in model container [2022-07-20 20:45:13,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:45:13" (3/3) ... [2022-07-20 20:45:13,370 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2022-07-20 20:45:13,396 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:45:13,396 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:45:13,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:45:13,471 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@23d7275e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@38febe6 [2022-07-20 20:45:13,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:45:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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) [2022-07-20 20:45:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 20:45:13,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:13,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:13,493 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -709303782, now seen corresponding path program 1 times [2022-07-20 20:45:13,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:13,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304568162] [2022-07-20 20:45:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:13,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:45:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:13,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304568162] [2022-07-20 20:45:13,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304568162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:45:13,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:45:13,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:45:13,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107786924] [2022-07-20 20:45:13,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:45:13,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:45:13,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:13,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:45:13,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:45:13,802 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-20 20:45:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:13,842 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-07-20 20:45:13,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:45:13,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2022-07-20 20:45:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:13,856 INFO L225 Difference]: With dead ends: 52 [2022-07-20 20:45:13,856 INFO L226 Difference]: Without dead ends: 25 [2022-07-20 20:45:13,859 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 [2022-07-20 20:45:13,862 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:13,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:45:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-20 20:45:13,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-20 20:45:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 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) [2022-07-20 20:45:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-20 20:45:13,905 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 10 [2022-07-20 20:45:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:13,906 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-20 20:45:13,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-07-20 20:45:13,907 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-20 20:45:13,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 20:45:13,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:13,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:13,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:45:13,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:13,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:13,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1757860049, now seen corresponding path program 1 times [2022-07-20 20:45:13,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:13,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327525753] [2022-07-20 20:45:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:13,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:45:13,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327525753] [2022-07-20 20:45:13,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327525753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:45:13,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:45:13,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:45:13,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576342480] [2022-07-20 20:45:13,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:45:13,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:45:13,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:45:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:45:13,982 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-20 20:45:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:14,007 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-07-20 20:45:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:45:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2022-07-20 20:45:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:14,009 INFO L225 Difference]: With dead ends: 43 [2022-07-20 20:45:14,009 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 20:45:14,011 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 [2022-07-20 20:45:14,013 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:14,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 43 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:45:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 20:45:14,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-20 20:45:14,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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) [2022-07-20 20:45:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-20 20:45:14,022 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 12 [2022-07-20 20:45:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:14,025 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-20 20:45:14,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-20 20:45:14,026 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-20 20:45:14,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-20 20:45:14,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:14,028 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:14,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 20:45:14,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:14,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1154344644, now seen corresponding path program 1 times [2022-07-20 20:45:14,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:14,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158989403] [2022-07-20 20:45:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:14,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:45:14,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:14,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158989403] [2022-07-20 20:45:14,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158989403] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:14,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192741033] [2022-07-20 20:45:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:14,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:14,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:14,095 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) [2022-07-20 20:45:14,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:45:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:14,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:45:14,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:45:14,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:45:14,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192741033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:14,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:14,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:45:14,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002122929] [2022-07-20 20:45:14,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:14,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:45:14,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:14,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:45:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:45:14,265 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-07-20 20:45:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:14,305 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2022-07-20 20:45:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:45:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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 15 [2022-07-20 20:45:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:14,307 INFO L225 Difference]: With dead ends: 51 [2022-07-20 20:45:14,307 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 20:45:14,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:45:14,311 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:14,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:45:14,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 20:45:14,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-20 20:45:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2022-07-20 20:45:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-20 20:45:14,322 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2022-07-20 20:45:14,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:14,322 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-20 20:45:14,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 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) [2022-07-20 20:45:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-20 20:45:14,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 20:45:14,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:14,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:14,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:14,539 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 [2022-07-20 20:45:14,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:14,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:14,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2107451126, now seen corresponding path program 2 times [2022-07-20 20:45:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:14,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512579837] [2022-07-20 20:45:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:14,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 20:45:14,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:14,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512579837] [2022-07-20 20:45:14,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512579837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:14,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094435643] [2022-07-20 20:45:14,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:45:14,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:14,640 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) [2022-07-20 20:45:14,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:45:14,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:45:14,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:14,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:45:14,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:45:14,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:45:14,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094435643] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:14,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:14,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-20 20:45:14,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25861464] [2022-07-20 20:45:14,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:14,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 20:45:14,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 20:45:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 20:45:14,874 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-07-20 20:45:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:15,038 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-07-20 20:45:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 20:45:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 21 [2022-07-20 20:45:15,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:15,039 INFO L225 Difference]: With dead ends: 68 [2022-07-20 20:45:15,040 INFO L226 Difference]: Without dead ends: 48 [2022-07-20 20:45:15,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2022-07-20 20:45:15,041 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:15,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 220 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:45:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-20 20:45:15,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-07-20 20:45:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 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) [2022-07-20 20:45:15,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-20 20:45:15,047 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 21 [2022-07-20 20:45:15,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:15,047 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-20 20:45:15,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-07-20 20:45:15,048 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-20 20:45:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 20:45:15,049 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:15,049 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:15,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:15,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-20 20:45:15,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:15,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1706483837, now seen corresponding path program 3 times [2022-07-20 20:45:15,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:15,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118910397] [2022-07-20 20:45:15,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 20:45:15,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:15,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118910397] [2022-07-20 20:45:15,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118910397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:15,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834451568] [2022-07-20 20:45:15,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:45:15,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:15,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:15,456 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) [2022-07-20 20:45:15,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:45:15,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 20:45:15,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 20:45:15,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 20:45:15,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 20:45:15,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834451568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:15,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:15,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-20 20:45:15,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484282223] [2022-07-20 20:45:15,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:15,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 20:45:15,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 20:45:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 20:45:15,661 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 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) [2022-07-20 20:45:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:15,845 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2022-07-20 20:45:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 20:45:15,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 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 36 [2022-07-20 20:45:15,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:15,846 INFO L225 Difference]: With dead ends: 84 [2022-07-20 20:45:15,846 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 20:45:15,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2022-07-20 20:45:15,848 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:15,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 159 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:45:15,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 20:45:15,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-07-20 20:45:15,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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) [2022-07-20 20:45:15,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-20 20:45:15,854 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 36 [2022-07-20 20:45:15,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:15,854 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-20 20:45:15,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 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) [2022-07-20 20:45:15,855 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-20 20:45:15,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-20 20:45:15,856 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:15,856 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:15,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:16,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:16,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash 917953989, now seen corresponding path program 4 times [2022-07-20 20:45:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:16,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313309727] [2022-07-20 20:45:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:16,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:45:16,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:16,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313309727] [2022-07-20 20:45:16,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313309727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:16,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129997563] [2022-07-20 20:45:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:45:16,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:16,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:16,235 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) [2022-07-20 20:45:16,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:45:16,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:45:16,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 20:45:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:16,382 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:45:16,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:45:16,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129997563] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:16,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:16,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-20 20:45:16,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897154608] [2022-07-20 20:45:16,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:16,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 20:45:16,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:16,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 20:45:16,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-20 20:45:16,625 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-07-20 20:45:16,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:16,719 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2022-07-20 20:45:16,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 20:45:16,720 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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 50 [2022-07-20 20:45:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:16,724 INFO L225 Difference]: With dead ends: 121 [2022-07-20 20:45:16,724 INFO L226 Difference]: Without dead ends: 86 [2022-07-20 20:45:16,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-20 20:45:16,727 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:16,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 146 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:45:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-20 20:45:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-07-20 20:45:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 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) [2022-07-20 20:45:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2022-07-20 20:45:16,747 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 50 [2022-07-20 20:45:16,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:16,747 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2022-07-20 20:45:16,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 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) [2022-07-20 20:45:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2022-07-20 20:45:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 20:45:16,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:16,754 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:16,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 20:45:16,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:16,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1581858143, now seen corresponding path program 5 times [2022-07-20 20:45:16,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:16,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782422811] [2022-07-20 20:45:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:16,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:45:17,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:17,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782422811] [2022-07-20 20:45:17,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782422811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:17,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823056767] [2022-07-20 20:45:17,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:45:17,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:17,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:17,369 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) [2022-07-20 20:45:17,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:45:18,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-20 20:45:18,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:18,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 20:45:18,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:45:18,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:45:19,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823056767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:19,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:19,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-20 20:45:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895451539] [2022-07-20 20:45:19,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:19,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 20:45:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:19,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 20:45:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:45:19,372 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-07-20 20:45:19,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:19,509 INFO L93 Difference]: Finished difference Result 173 states and 218 transitions. [2022-07-20 20:45:19,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 20:45:19,509 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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 76 [2022-07-20 20:45:19,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:19,510 INFO L225 Difference]: With dead ends: 173 [2022-07-20 20:45:19,511 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 20:45:19,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:45:19,513 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:19,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 146 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:45:19,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 20:45:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-07-20 20:45:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 134 states have (on average 1.0746268656716418) internal successors, (144), 134 states have internal predecessors, (144), 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) [2022-07-20 20:45:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2022-07-20 20:45:19,523 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 76 [2022-07-20 20:45:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:19,523 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2022-07-20 20:45:19,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 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) [2022-07-20 20:45:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2022-07-20 20:45:19,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-20 20:45:19,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:19,525 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:19,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:19,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:19,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:19,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:19,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2095671533, now seen corresponding path program 6 times [2022-07-20 20:45:19,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:19,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666532211] [2022-07-20 20:45:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:19,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:45:20,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666532211] [2022-07-20 20:45:20,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666532211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:20,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647105954] [2022-07-20 20:45:20,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:45:20,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:20,916 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) [2022-07-20 20:45:20,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 20:45:21,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-20 20:45:21,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:21,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 20:45:21,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-07-20 20:45:21,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2500 trivial. 0 not checked. [2022-07-20 20:45:21,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647105954] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:21,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:21,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 9, 9] total 67 [2022-07-20 20:45:21,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862828511] [2022-07-20 20:45:21,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:21,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-20 20:45:21,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:21,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-20 20:45:21,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2925, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 20:45:21,852 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 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) [2022-07-20 20:45:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:23,139 INFO L93 Difference]: Finished difference Result 200 states and 236 transitions. [2022-07-20 20:45:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-20 20:45:23,141 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 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 128 [2022-07-20 20:45:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:23,142 INFO L225 Difference]: With dead ends: 200 [2022-07-20 20:45:23,142 INFO L226 Difference]: Without dead ends: 165 [2022-07-20 20:45:23,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4914, Invalid=8892, Unknown=0, NotChecked=0, Total=13806 [2022-07-20 20:45:23,145 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:23,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 275 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:45:23,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-20 20:45:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-07-20 20:45:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.1125) internal successors, (178), 160 states have internal predecessors, (178), 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) [2022-07-20 20:45:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2022-07-20 20:45:23,169 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 128 [2022-07-20 20:45:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:23,170 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2022-07-20 20:45:23,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.3582089552238807) internal successors, (158), 67 states have internal predecessors, (158), 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) [2022-07-20 20:45:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2022-07-20 20:45:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-20 20:45:23,174 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:23,175 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:23,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:23,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:23,375 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:23,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1928839019, now seen corresponding path program 7 times [2022-07-20 20:45:23,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:23,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121936060] [2022-07-20 20:45:23,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:23,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:45:24,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121936060] [2022-07-20 20:45:24,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121936060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:24,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810408790] [2022-07-20 20:45:24,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:45:24,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:24,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:24,376 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:45:24,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 20:45:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:24,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 20:45:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:45:24,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:45:27,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810408790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:27,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:27,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-07-20 20:45:27,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341982583] [2022-07-20 20:45:27,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:27,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-20 20:45:27,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-20 20:45:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 20:45:27,328 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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) [2022-07-20 20:45:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:27,615 INFO L93 Difference]: Finished difference Result 329 states and 417 transitions. [2022-07-20 20:45:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-20 20:45:27,615 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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 154 [2022-07-20 20:45:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:27,617 INFO L225 Difference]: With dead ends: 329 [2022-07-20 20:45:27,617 INFO L226 Difference]: Without dead ends: 270 [2022-07-20 20:45:27,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 20:45:27,620 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 104 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:27,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 122 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:45:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-20 20:45:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-07-20 20:45:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 266 states have (on average 1.0676691729323309) internal successors, (284), 266 states have internal predecessors, (284), 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) [2022-07-20 20:45:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 288 transitions. [2022-07-20 20:45:27,632 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 288 transitions. Word has length 154 [2022-07-20 20:45:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:27,633 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 288 transitions. [2022-07-20 20:45:27,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 states have internal predecessors, (221), 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) [2022-07-20 20:45:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 288 transitions. [2022-07-20 20:45:27,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-07-20 20:45:27,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:27,636 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:27,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:27,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:27,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:27,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:27,844 INFO L85 PathProgramCache]: Analyzing trace with hash -464172929, now seen corresponding path program 8 times [2022-07-20 20:45:27,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:27,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077385476] [2022-07-20 20:45:27,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:27,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:45:31,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:31,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077385476] [2022-07-20 20:45:31,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077385476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:31,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945396011] [2022-07-20 20:45:31,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:45:31,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:31,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:31,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:45:31,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 20:45:31,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:45:31,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:31,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-20 20:45:31,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:45:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:45:32,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:45:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11103 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:45:42,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945396011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:45:42,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:45:42,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2022-07-20 20:45:42,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162299363] [2022-07-20 20:45:42,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:45:42,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-07-20 20:45:42,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:45:42,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-07-20 20:45:42,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-20 20:45:42,477 INFO L87 Difference]: Start difference. First operand 270 states and 288 transitions. Second operand has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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) [2022-07-20 20:45:43,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:45:43,299 INFO L93 Difference]: Finished difference Result 541 states and 682 transitions. [2022-07-20 20:45:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-07-20 20:45:43,300 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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 260 [2022-07-20 20:45:43,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:45:43,302 INFO L225 Difference]: With dead ends: 541 [2022-07-20 20:45:43,302 INFO L226 Difference]: Without dead ends: 482 [2022-07-20 20:45:43,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-20 20:45:43,307 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 315 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 20:45:43,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 122 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 20:45:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-20 20:45:43,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2022-07-20 20:45:43,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 478 states have (on average 1.0376569037656904) internal successors, (496), 478 states have internal predecessors, (496), 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) [2022-07-20 20:45:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 500 transitions. [2022-07-20 20:45:43,323 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 500 transitions. Word has length 260 [2022-07-20 20:45:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:45:43,323 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 500 transitions. [2022-07-20 20:45:43,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.032863849765258) internal successors, (433), 213 states have internal predecessors, (433), 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) [2022-07-20 20:45:43,324 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 500 transitions. [2022-07-20 20:45:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2022-07-20 20:45:43,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:45:43,336 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:45:43,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 20:45:43,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 20:45:43,552 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:45:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:45:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1485341997, now seen corresponding path program 9 times [2022-07-20 20:45:43,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:45:43,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193450120] [2022-07-20 20:45:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:45:43,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:45:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:45:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-20 20:45:57,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:45:57,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193450120] [2022-07-20 20:45:57,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193450120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:45:57,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557940672] [2022-07-20 20:45:57,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:45:57,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:45:57,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:45:57,688 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:45:57,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 20:45:59,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-20 20:45:59,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:45:59,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 20:45:59,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:46:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2022-07-20 20:46:00,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:46:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 44387 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 44100 trivial. 0 not checked. [2022-07-20 20:46:02,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557940672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:46:02,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:46:02,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 17, 17] total 243 [2022-07-20 20:46:02,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647059658] [2022-07-20 20:46:02,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:46:02,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 243 states [2022-07-20 20:46:02,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:46:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 243 interpolants. [2022-07-20 20:46:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23073, Invalid=35733, Unknown=0, NotChecked=0, Total=58806 [2022-07-20 20:46:02,428 INFO L87 Difference]: Start difference. First operand 482 states and 500 transitions. Second operand has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 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) [2022-07-20 20:46:19,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:46:19,396 INFO L93 Difference]: Finished difference Result 592 states and 660 transitions. [2022-07-20 20:46:19,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2022-07-20 20:46:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 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 472 [2022-07-20 20:46:19,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:46:19,400 INFO L225 Difference]: With dead ends: 592 [2022-07-20 20:46:19,400 INFO L226 Difference]: Without dead ends: 533 [2022-07-20 20:46:19,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 914 SyntacticMatches, 0 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28455 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=74346, Invalid=131316, Unknown=0, NotChecked=0, Total=205662 [2022-07-20 20:46:19,415 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 785 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 20:46:19,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 218 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 20:46:19,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-07-20 20:46:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 532. [2022-07-20 20:46:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 528 states have (on average 1.0643939393939394) internal successors, (562), 528 states have internal predecessors, (562), 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) [2022-07-20 20:46:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 566 transitions. [2022-07-20 20:46:19,431 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 566 transitions. Word has length 472 [2022-07-20 20:46:19,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:46:19,432 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 566 transitions. [2022-07-20 20:46:19,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 243 states, 243 states have (on average 2.1646090534979425) internal successors, (526), 243 states have internal predecessors, (526), 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) [2022-07-20 20:46:19,433 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 566 transitions. [2022-07-20 20:46:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2022-07-20 20:46:19,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:46:19,441 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:46:19,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 20:46:19,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:46:19,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:46:19,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:46:19,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1444814123, now seen corresponding path program 10 times [2022-07-20 20:46:19,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:46:19,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611486698] [2022-07-20 20:46:19,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:46:19,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:46:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:46:33,534 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-07-20 20:46:33,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:46:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611486698] [2022-07-20 20:46:33,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611486698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:46:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821638834] [2022-07-20 20:46:33,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:46:33,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:46:33,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:46:33,537 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:46:33,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 20:46:50,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:46:50,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:46:50,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 213 conjunts are in the unsatisfiable core [2022-07-20 20:46:50,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:46:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-07-20 20:46:50,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:47:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 45856 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-07-20 20:47:30,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821638834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:47:30,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:47:30,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2022-07-20 20:47:30,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423156889] [2022-07-20 20:47:30,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:47:30,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2022-07-20 20:47:30,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:47:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2022-07-20 20:47:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-20 20:47:30,853 INFO L87 Difference]: Start difference. First operand 532 states and 566 transitions. Second operand has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 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) [2022-07-20 20:47:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:47:35,515 INFO L93 Difference]: Finished difference Result 1065 states and 1345 transitions. [2022-07-20 20:47:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2022-07-20 20:47:35,516 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 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 522 [2022-07-20 20:47:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:47:35,520 INFO L225 Difference]: With dead ends: 1065 [2022-07-20 20:47:35,521 INFO L226 Difference]: Without dead ends: 958 [2022-07-20 20:47:35,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1256 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-20 20:47:35,534 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 424 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 20:47:35,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 194 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 20:47:35,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-07-20 20:47:35,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 958. [2022-07-20 20:47:35,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 954 states have (on average 1.0356394129979036) internal successors, (988), 954 states have internal predecessors, (988), 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) [2022-07-20 20:47:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 992 transitions. [2022-07-20 20:47:35,562 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 992 transitions. Word has length 522 [2022-07-20 20:47:35,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:47:35,563 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 992 transitions. [2022-07-20 20:47:35,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 2.0163934426229506) internal successors, (861), 427 states have internal predecessors, (861), 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) [2022-07-20 20:47:35,564 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 992 transitions. [2022-07-20 20:47:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2022-07-20 20:47:35,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:47:35,573 INFO L195 NwaCegarLoop]: trace histogram [424, 424, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:47:35,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 20:47:35,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 20:47:35,784 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:47:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:47:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash 18860031, now seen corresponding path program 11 times [2022-07-20 20:47:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:47:35,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605739260] [2022-07-20 20:47:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:47:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:47:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:48:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 181111 backedges. 0 proven. 179776 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-07-20 20:48:30,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:48:30,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605739260] [2022-07-20 20:48:30,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605739260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:48:30,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548642812] [2022-07-20 20:48:30,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:48:30,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:48:30,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:48:30,669 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:48:30,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process