./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e19ca921 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-21 23:57:14,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 23:57:14,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 23:57:14,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 23:57:14,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 23:57:14,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 23:57:14,080 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 23:57:14,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 23:57:14,082 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 23:57:14,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 23:57:14,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 23:57:14,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 23:57:14,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 23:57:14,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 23:57:14,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 23:57:14,110 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 23:57:14,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 23:57:14,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 23:57:14,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 23:57:14,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 23:57:14,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 23:57:14,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 23:57:14,125 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 23:57:14,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 23:57:14,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 23:57:14,130 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 23:57:14,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 23:57:14,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 23:57:14,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 23:57:14,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 23:57:14,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 23:57:14,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 23:57:14,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 23:57:14,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 23:57:14,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 23:57:14,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 23:57:14,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 23:57:14,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 23:57:14,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 23:57:14,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 23:57:14,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 23:57:14,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 23:57:14,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 23:57:14,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 23:57:14,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 23:57:14,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 23:57:14,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 23:57:14,164 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 23:57:14,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 23:57:14,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 23:57:14,165 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 23:57:14,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 23:57:14,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 23:57:14,166 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 23:57:14,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 23:57:14,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 23:57:14,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 23:57:14,166 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 23:57:14,167 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 23:57:14,167 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 23:57:14,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 23:57:14,167 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 23:57:14,167 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 23:57:14,167 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 23:57:14,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 23:57:14,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 23:57:14,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 23:57:14,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:14,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 23:57:14,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 23:57:14,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 23:57:14,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 23:57:14,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 23:57:14,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2021-12-21 23:57:14,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 23:57:14,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 23:57:14,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 23:57:14,345 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 23:57:14,345 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 23:57:14,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-12-21 23:57:14,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f081030f5/8bbbefe1b21e4ada8b39e1f70c308a4f/FLAGf1f5ff5b8 [2021-12-21 23:57:14,744 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 23:57:14,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-12-21 23:57:14,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f081030f5/8bbbefe1b21e4ada8b39e1f70c308a4f/FLAGf1f5ff5b8 [2021-12-21 23:57:15,136 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f081030f5/8bbbefe1b21e4ada8b39e1f70c308a4f [2021-12-21 23:57:15,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 23:57:15,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 23:57:15,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:15,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 23:57:15,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 23:57:15,146 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@348cabbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15, skipping insertion in model container [2021-12-21 23:57:15,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,152 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 23:57:15,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 23:57:15,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:15,350 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 23:57:15,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 23:57:15,411 INFO L208 MainTranslator]: Completed translation [2021-12-21 23:57:15,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15 WrapperNode [2021-12-21 23:57:15,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 23:57:15,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 23:57:15,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 23:57:15,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 23:57:15,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,456 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-12-21 23:57:15,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 23:57:15,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 23:57:15,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 23:57:15,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 23:57:15,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 23:57:15,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 23:57:15,504 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 23:57:15,504 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 23:57:15,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (1/1) ... [2021-12-21 23:57:15,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 23:57:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:15,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 23:57:15,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 23:57:15,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 23:57:15,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 23:57:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 23:57:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 23:57:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 23:57:15,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 23:57:15,651 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 23:57:15,652 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 23:57:15,772 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 23:57:15,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 23:57:15,777 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 23:57:15,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:57:15 BoogieIcfgContainer [2021-12-21 23:57:15,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 23:57:15,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 23:57:15,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 23:57:15,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 23:57:15,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:57:15" (1/3) ... [2021-12-21 23:57:15,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca2bd4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:57:15, skipping insertion in model container [2021-12-21 23:57:15,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:57:15" (2/3) ... [2021-12-21 23:57:15,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ca2bd4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:57:15, skipping insertion in model container [2021-12-21 23:57:15,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:57:15" (3/3) ... [2021-12-21 23:57:15,784 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2021-12-21 23:57:15,788 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 23:57:15,788 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-21 23:57:15,855 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 23:57:15,859 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 23:57:15,860 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-21 23:57:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 1.878787878787879) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:15,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 23:57:15,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:15,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:15,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:15,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-21 23:57:15,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:15,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219140027] [2021-12-21 23:57:15,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:15,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219140027] [2021-12-21 23:57:16,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219140027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:16,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:16,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:16,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638571327] [2021-12-21 23:57:16,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:16,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:16,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:16,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,028 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 1.878787878787879) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:16,063 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-12-21 23:57:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:16,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 23:57:16,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:16,070 INFO L225 Difference]: With dead ends: 98 [2021-12-21 23:57:16,070 INFO L226 Difference]: Without dead ends: 94 [2021-12-21 23:57:16,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,074 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:16,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-21 23:57:16,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-12-21 23:57:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-12-21 23:57:16,097 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 7 [2021-12-21 23:57:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:16,097 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-12-21 23:57:16,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-12-21 23:57:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 23:57:16,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:16,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:16,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 23:57:16,098 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-21 23:57:16,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:16,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294496147] [2021-12-21 23:57:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294496147] [2021-12-21 23:57:16,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294496147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:16,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:16,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 23:57:16,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373990232] [2021-12-21 23:57:16,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:16,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:57:16,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:16,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:57:16,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:57:16,144 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:16,168 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2021-12-21 23:57:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:57:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 23:57:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:16,169 INFO L225 Difference]: With dead ends: 52 [2021-12-21 23:57:16,169 INFO L226 Difference]: Without dead ends: 52 [2021-12-21 23:57:16,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:57:16,170 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:16,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-21 23:57:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-21 23:57:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 51 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2021-12-21 23:57:16,175 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 7 [2021-12-21 23:57:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:16,175 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2021-12-21 23:57:16,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2021-12-21 23:57:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 23:57:16,176 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:16,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:16,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 23:57:16,176 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:16,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-21 23:57:16,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:16,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893821178] [2021-12-21 23:57:16,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893821178] [2021-12-21 23:57:16,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893821178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:16,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:16,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:16,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342827101] [2021-12-21 23:57:16,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:16,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:16,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:16,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:16,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,226 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:16,288 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-12-21 23:57:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:16,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-21 23:57:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:16,290 INFO L225 Difference]: With dead ends: 95 [2021-12-21 23:57:16,290 INFO L226 Difference]: Without dead ends: 95 [2021-12-21 23:57:16,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:16,291 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:16,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:16,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-21 23:57:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 54. [2021-12-21 23:57:16,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-21 23:57:16,334 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 7 [2021-12-21 23:57:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:16,334 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-21 23:57:16,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,335 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-21 23:57:16,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 23:57:16,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:16,335 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:16,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 23:57:16,336 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:16,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:16,337 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-21 23:57:16,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:16,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045556150] [2021-12-21 23:57:16,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045556150] [2021-12-21 23:57:16,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045556150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:16,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:16,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:16,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916083294] [2021-12-21 23:57:16,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:16,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:16,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,433 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:16,460 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-21 23:57:16,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:16,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 23:57:16,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:16,462 INFO L225 Difference]: With dead ends: 53 [2021-12-21 23:57:16,463 INFO L226 Difference]: Without dead ends: 53 [2021-12-21 23:57:16,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,480 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:16,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 37 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-21 23:57:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-21 23:57:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-21 23:57:16,483 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 9 [2021-12-21 23:57:16,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:16,483 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-21 23:57:16,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,483 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-21 23:57:16,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 23:57:16,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:16,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:16,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 23:57:16,484 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-21 23:57:16,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:16,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357192656] [2021-12-21 23:57:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357192656] [2021-12-21 23:57:16,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357192656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:16,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:16,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:16,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380889408] [2021-12-21 23:57:16,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:16,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:16,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,531 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:16,543 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-12-21 23:57:16,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:16,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 23:57:16,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:16,544 INFO L225 Difference]: With dead ends: 96 [2021-12-21 23:57:16,545 INFO L226 Difference]: Without dead ends: 96 [2021-12-21 23:57:16,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,546 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:16,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-21 23:57:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-12-21 23:57:16,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.5625) internal successors, (75), 63 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2021-12-21 23:57:16,549 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 9 [2021-12-21 23:57:16,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:16,549 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2021-12-21 23:57:16,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2021-12-21 23:57:16,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 23:57:16,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:16,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:16,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 23:57:16,550 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:16,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:16,551 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-21 23:57:16,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:16,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129376128] [2021-12-21 23:57:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129376128] [2021-12-21 23:57:16,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129376128] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:16,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:16,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:16,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981734954] [2021-12-21 23:57:16,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:16,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:16,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:16,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:16,588 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:16,631 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2021-12-21 23:57:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 23:57:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:16,633 INFO L225 Difference]: With dead ends: 100 [2021-12-21 23:57:16,633 INFO L226 Difference]: Without dead ends: 100 [2021-12-21 23:57:16,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:16,637 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 120 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:16,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 66 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-21 23:57:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2021-12-21 23:57:16,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-12-21 23:57:16,641 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 9 [2021-12-21 23:57:16,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:16,641 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-12-21 23:57:16,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-12-21 23:57:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 23:57:16,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:16,643 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:16,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 23:57:16,643 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:16,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:16,644 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-21 23:57:16,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:16,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894626979] [2021-12-21 23:57:16,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894626979] [2021-12-21 23:57:16,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894626979] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:16,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:16,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:16,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819832924] [2021-12-21 23:57:16,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:16,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:16,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:16,731 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:16,796 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2021-12-21 23:57:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:16,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 23:57:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:16,798 INFO L225 Difference]: With dead ends: 96 [2021-12-21 23:57:16,798 INFO L226 Difference]: Without dead ends: 96 [2021-12-21 23:57:16,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 23:57:16,799 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:16,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 85 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-21 23:57:16,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-12-21 23:57:16,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.52) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2021-12-21 23:57:16,809 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 9 [2021-12-21 23:57:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:16,810 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2021-12-21 23:57:16,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2021-12-21 23:57:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-21 23:57:16,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:16,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 23:57:16,811 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:16,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:16,814 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-21 23:57:16,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:16,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880627127] [2021-12-21 23:57:16,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880627127] [2021-12-21 23:57:16,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880627127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:16,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:16,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:16,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317202066] [2021-12-21 23:57:16,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:16,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:16,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,852 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:16,873 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2021-12-21 23:57:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-21 23:57:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:16,874 INFO L225 Difference]: With dead ends: 63 [2021-12-21 23:57:16,874 INFO L226 Difference]: Without dead ends: 63 [2021-12-21 23:57:16,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:16,876 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:16,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:16,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-21 23:57:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-21 23:57:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.5) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-12-21 23:57:16,880 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 10 [2021-12-21 23:57:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:16,881 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-12-21 23:57:16,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:16,883 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-12-21 23:57:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 23:57:16,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:16,884 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:16,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 23:57:16,884 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:16,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:16,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-21 23:57:16,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:16,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143635823] [2021-12-21 23:57:16,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:16,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:16,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:16,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143635823] [2021-12-21 23:57:16,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143635823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:16,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606532584] [2021-12-21 23:57:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:16,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:16,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:16,977 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:17,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 23:57:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:17,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-21 23:57:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:17,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:57:17,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 23:57:17,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 23:57:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:17,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:17,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606532584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:17,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:17,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-21 23:57:17,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880825641] [2021-12-21 23:57:17,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:17,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 23:57:17,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:17,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 23:57:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 23:57:17,300 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:17,431 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2021-12-21 23:57:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 23:57:17,432 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-21 23:57:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:17,433 INFO L225 Difference]: With dead ends: 146 [2021-12-21 23:57:17,433 INFO L226 Difference]: Without dead ends: 146 [2021-12-21 23:57:17,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-21 23:57:17,433 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 198 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:17,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 252 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-12-21 23:57:17,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 58. [2021-12-21 23:57:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 57 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-12-21 23:57:17,436 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 11 [2021-12-21 23:57:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:17,436 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-12-21 23:57:17,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,436 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-12-21 23:57:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:57:17,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:17,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:17,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:17,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:17,653 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2021-12-21 23:57:17,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:17,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592607624] [2021-12-21 23:57:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:17,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:17,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:17,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592607624] [2021-12-21 23:57:17,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592607624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:17,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:17,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 23:57:17,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738972716] [2021-12-21 23:57:17,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:17,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 23:57:17,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 23:57:17,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 23:57:17,702 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:17,750 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-12-21 23:57:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:57:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:17,751 INFO L225 Difference]: With dead ends: 81 [2021-12-21 23:57:17,751 INFO L226 Difference]: Without dead ends: 81 [2021-12-21 23:57:17,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:17,752 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:17,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 63 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-21 23:57:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2021-12-21 23:57:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2021-12-21 23:57:17,754 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 12 [2021-12-21 23:57:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:17,754 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2021-12-21 23:57:17,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2021-12-21 23:57:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-21 23:57:17,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:17,755 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:17,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 23:57:17,755 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:17,755 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-12-21 23:57:17,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:17,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888695888] [2021-12-21 23:57:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:17,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:17,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:17,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:17,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888695888] [2021-12-21 23:57:17,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888695888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:17,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:17,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:17,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724698892] [2021-12-21 23:57:17,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:17,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:17,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:17,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:17,774 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:17,796 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2021-12-21 23:57:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:17,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-21 23:57:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:17,796 INFO L225 Difference]: With dead ends: 63 [2021-12-21 23:57:17,797 INFO L226 Difference]: Without dead ends: 63 [2021-12-21 23:57:17,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:17,797 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:17,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-21 23:57:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-21 23:57:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-12-21 23:57:17,799 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 12 [2021-12-21 23:57:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:17,799 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-12-21 23:57:17,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:17,799 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-12-21 23:57:17,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 23:57:17,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:17,800 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:17,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 23:57:17,800 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:17,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-21 23:57:17,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:17,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463788282] [2021-12-21 23:57:17,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:17,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:17,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:17,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463788282] [2021-12-21 23:57:17,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463788282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:17,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460795220] [2021-12-21 23:57:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:17,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:17,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:17,846 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:17,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 23:57:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 23:57:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:17,903 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 23:57:17,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 23:57:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:17,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:18,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460795220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:18,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:18,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-21 23:57:18,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752193414] [2021-12-21 23:57:18,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:18,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 23:57:18,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:18,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 23:57:18,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-21 23:57:18,072 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:18,193 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2021-12-21 23:57:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 23:57:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 23:57:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:18,194 INFO L225 Difference]: With dead ends: 133 [2021-12-21 23:57:18,194 INFO L226 Difference]: Without dead ends: 133 [2021-12-21 23:57:18,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-21 23:57:18,195 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 232 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:18,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 188 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-12-21 23:57:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 60. [2021-12-21 23:57:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-21 23:57:18,197 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 13 [2021-12-21 23:57:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:18,197 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-21 23:57:18,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,198 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-21 23:57:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 23:57:18,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:18,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:18,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:18,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 23:57:18,415 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1432374396, now seen corresponding path program 1 times [2021-12-21 23:57:18,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:18,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849625353] [2021-12-21 23:57:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:18,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:18,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:18,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:18,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849625353] [2021-12-21 23:57:18,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849625353] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:18,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:18,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:18,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844144208] [2021-12-21 23:57:18,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:18,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 23:57:18,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:18,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 23:57:18,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 23:57:18,436 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:18,454 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-12-21 23:57:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:18,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 23:57:18,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:18,455 INFO L225 Difference]: With dead ends: 58 [2021-12-21 23:57:18,455 INFO L226 Difference]: Without dead ends: 58 [2021-12-21 23:57:18,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:18,456 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:18,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-21 23:57:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-21 23:57:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-21 23:57:18,458 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 16 [2021-12-21 23:57:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:18,458 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-21 23:57:18,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-21 23:57:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 23:57:18,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:18,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:18,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 23:57:18,459 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:18,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1432374395, now seen corresponding path program 1 times [2021-12-21 23:57:18,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:18,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211466395] [2021-12-21 23:57:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:18,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:18,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:18,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211466395] [2021-12-21 23:57:18,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211466395] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:18,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:18,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:18,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611903485] [2021-12-21 23:57:18,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:18,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:18,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:18,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:18,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:18,496 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:18,532 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-12-21 23:57:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 23:57:18,532 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 23:57:18,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:18,533 INFO L225 Difference]: With dead ends: 66 [2021-12-21 23:57:18,533 INFO L226 Difference]: Without dead ends: 66 [2021-12-21 23:57:18,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 23:57:18,533 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:18,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 58 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:18,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-21 23:57:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-12-21 23:57:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-12-21 23:57:18,535 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 16 [2021-12-21 23:57:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:18,535 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-12-21 23:57:18,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-12-21 23:57:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 23:57:18,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:18,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:18,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 23:57:18,536 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:18,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1432365322, now seen corresponding path program 1 times [2021-12-21 23:57:18,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:18,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015069293] [2021-12-21 23:57:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:18,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:18,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:18,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015069293] [2021-12-21 23:57:18,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015069293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:18,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:18,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 23:57:18,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051732146] [2021-12-21 23:57:18,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:18,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 23:57:18,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:18,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 23:57:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 23:57:18,552 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:18,556 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-12-21 23:57:18,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 23:57:18,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-21 23:57:18,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:18,556 INFO L225 Difference]: With dead ends: 62 [2021-12-21 23:57:18,556 INFO L226 Difference]: Without dead ends: 62 [2021-12-21 23:57:18,557 INFO L932 BasicCegarLoop]: 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 [2021-12-21 23:57:18,557 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:18,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-21 23:57:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-21 23:57:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-12-21 23:57:18,559 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 16 [2021-12-21 23:57:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:18,559 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-12-21 23:57:18,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-12-21 23:57:18,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 23:57:18,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:18,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:18,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 23:57:18,560 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:18,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1365500555, now seen corresponding path program 1 times [2021-12-21 23:57:18,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:18,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696684428] [2021-12-21 23:57:18,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:18,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:18,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:18,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696684428] [2021-12-21 23:57:18,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696684428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:18,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:18,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 23:57:18,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001483331] [2021-12-21 23:57:18,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:18,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 23:57:18,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:18,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 23:57:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-21 23:57:18,629 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:18,704 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-12-21 23:57:18,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 23:57:18,705 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 23:57:18,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:18,705 INFO L225 Difference]: With dead ends: 85 [2021-12-21 23:57:18,705 INFO L226 Difference]: Without dead ends: 85 [2021-12-21 23:57:18,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-12-21 23:57:18,706 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:18,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 188 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-21 23:57:18,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-12-21 23:57:18,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2021-12-21 23:57:18,708 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 19 [2021-12-21 23:57:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:18,708 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2021-12-21 23:57:18,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,708 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2021-12-21 23:57:18,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 23:57:18,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:18,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:18,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 23:57:18,709 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:18,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:18,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1341118839, now seen corresponding path program 1 times [2021-12-21 23:57:18,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:18,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778725201] [2021-12-21 23:57:18,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:18,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:18,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:18,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778725201] [2021-12-21 23:57:18,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778725201] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:18,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:18,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 23:57:18,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249397358] [2021-12-21 23:57:18,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:18,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 23:57:18,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 23:57:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 23:57:18,799 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:18,957 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-12-21 23:57:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:57:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-21 23:57:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:18,958 INFO L225 Difference]: With dead ends: 106 [2021-12-21 23:57:18,958 INFO L226 Difference]: Without dead ends: 106 [2021-12-21 23:57:18,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-21 23:57:18,959 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 109 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:18,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 199 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-21 23:57:18,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2021-12-21 23:57:18,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.267605633802817) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2021-12-21 23:57:18,961 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 19 [2021-12-21 23:57:18,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:18,961 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2021-12-21 23:57:18,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:18,961 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2021-12-21 23:57:18,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 23:57:18,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:18,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:18,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 23:57:18,961 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:18,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1756023060, now seen corresponding path program 1 times [2021-12-21 23:57:18,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:18,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042686223] [2021-12-21 23:57:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:18,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:19,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:19,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042686223] [2021-12-21 23:57:19,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042686223] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:19,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:19,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 23:57:19,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67575292] [2021-12-21 23:57:19,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:19,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 23:57:19,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:19,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 23:57:19,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-21 23:57:19,088 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:19,286 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2021-12-21 23:57:19,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 23:57:19,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-21 23:57:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:19,287 INFO L225 Difference]: With dead ends: 134 [2021-12-21 23:57:19,287 INFO L226 Difference]: Without dead ends: 134 [2021-12-21 23:57:19,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-12-21 23:57:19,287 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:19,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 313 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-21 23:57:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-12-21 23:57:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 94 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2021-12-21 23:57:19,289 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 23 [2021-12-21 23:57:19,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:19,290 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2021-12-21 23:57:19,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2021-12-21 23:57:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 23:57:19,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:19,290 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:19,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 23:57:19,290 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:19,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1756082642, now seen corresponding path program 1 times [2021-12-21 23:57:19,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:19,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987792106] [2021-12-21 23:57:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:19,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:19,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:19,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987792106] [2021-12-21 23:57:19,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987792106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:19,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:19,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 23:57:19,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763850534] [2021-12-21 23:57:19,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:19,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 23:57:19,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:19,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 23:57:19,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:19,355 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:19,371 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-12-21 23:57:19,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 23:57:19,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-21 23:57:19,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:19,371 INFO L225 Difference]: With dead ends: 94 [2021-12-21 23:57:19,371 INFO L226 Difference]: Without dead ends: 55 [2021-12-21 23:57:19,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 23:57:19,372 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:19,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-21 23:57:19,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2021-12-21 23:57:19,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-12-21 23:57:19,373 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 23 [2021-12-21 23:57:19,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:19,373 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-12-21 23:57:19,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,374 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-12-21 23:57:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 23:57:19,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:19,374 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:19,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 23:57:19,374 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:19,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1222026810, now seen corresponding path program 1 times [2021-12-21 23:57:19,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:19,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545555308] [2021-12-21 23:57:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:19,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:19,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545555308] [2021-12-21 23:57:19,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545555308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403172333] [2021-12-21 23:57:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:19,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:19,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:19,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:19,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 23:57:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:19,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 23:57:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:19,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:57:19,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 23:57:19,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 23:57:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:19,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:19,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403172333] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:19,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:19,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-12-21 23:57:19,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147232449] [2021-12-21 23:57:19,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:19,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 23:57:19,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:19,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 23:57:19,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:19,780 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:19,934 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-12-21 23:57:19,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 23:57:19,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-21 23:57:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:19,935 INFO L225 Difference]: With dead ends: 66 [2021-12-21 23:57:19,935 INFO L226 Difference]: Without dead ends: 66 [2021-12-21 23:57:19,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-12-21 23:57:19,935 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:19,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 126 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-21 23:57:19,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-12-21 23:57:19,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-12-21 23:57:19,937 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 23 [2021-12-21 23:57:19,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:19,937 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-12-21 23:57:19,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:19,937 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-12-21 23:57:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 23:57:19,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:19,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:19,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:20,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:20,138 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 340221504, now seen corresponding path program 1 times [2021-12-21 23:57:20,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:20,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912345175] [2021-12-21 23:57:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:20,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:20,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912345175] [2021-12-21 23:57:20,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912345175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:20,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175518970] [2021-12-21 23:57:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:20,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:20,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:20,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:20,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 23:57:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:20,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-21 23:57:20,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:20,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 23:57:20,606 INFO L353 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-21 23:57:20,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-12-21 23:57:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:20,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 23:57:20,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175518970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:20,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 23:57:20,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2021-12-21 23:57:20,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040898059] [2021-12-21 23:57:20,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:20,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 23:57:20,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 23:57:20,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-12-21 23:57:20,632 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:20,765 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2021-12-21 23:57:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 23:57:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 23:57:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:20,766 INFO L225 Difference]: With dead ends: 58 [2021-12-21 23:57:20,766 INFO L226 Difference]: Without dead ends: 40 [2021-12-21 23:57:20,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-12-21 23:57:20,767 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:20,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 128 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2021-12-21 23:57:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-21 23:57:20,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-21 23:57:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-21 23:57:20,768 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 27 [2021-12-21 23:57:20,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:20,768 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-21 23:57:20,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-21 23:57:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 23:57:20,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:20,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:20,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:20,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:20,969 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash 206207998, now seen corresponding path program 1 times [2021-12-21 23:57:20,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071985747] [2021-12-21 23:57:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:20,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:21,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:21,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071985747] [2021-12-21 23:57:21,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071985747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 23:57:21,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 23:57:21,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-21 23:57:21,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344469117] [2021-12-21 23:57:21,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 23:57:21,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 23:57:21,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 23:57:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-21 23:57:21,117 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:21,270 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-12-21 23:57:21,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 23:57:21,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 23:57:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:21,272 INFO L225 Difference]: With dead ends: 54 [2021-12-21 23:57:21,272 INFO L226 Difference]: Without dead ends: 44 [2021-12-21 23:57:21,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-12-21 23:57:21,273 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:21,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 141 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 23:57:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-21 23:57:21,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-12-21 23:57:21,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-21 23:57:21,274 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 27 [2021-12-21 23:57:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:21,274 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-21 23:57:21,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-21 23:57:21,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 23:57:21,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:21,274 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:21,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 23:57:21,275 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:21,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2033318401, now seen corresponding path program 1 times [2021-12-21 23:57:21,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:21,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554545877] [2021-12-21 23:57:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:21,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:21,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554545877] [2021-12-21 23:57:21,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554545877] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:21,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481597989] [2021-12-21 23:57:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:21,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:21,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:21,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:21,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 23:57:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:21,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 23:57:21,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:21,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:21,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 23:57:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:21,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481597989] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:21,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:21,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-21 23:57:21,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081866239] [2021-12-21 23:57:21,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:21,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 23:57:21,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 23:57:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-21 23:57:21,703 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:21,850 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-12-21 23:57:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 23:57:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-21 23:57:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:21,850 INFO L225 Difference]: With dead ends: 57 [2021-12-21 23:57:21,850 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 23:57:21,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2021-12-21 23:57:21,851 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 176 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:21,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 121 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:21,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 23:57:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-21 23:57:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-21 23:57:21,852 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2021-12-21 23:57:21,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:21,852 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-21 23:57:21,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-21 23:57:21,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 23:57:21,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:21,853 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:21,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 23:57:22,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-21 23:57:22,053 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:22,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1630243463, now seen corresponding path program 1 times [2021-12-21 23:57:22,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:22,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010213920] [2021-12-21 23:57:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:22,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:22,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:22,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:22,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010213920] [2021-12-21 23:57:22,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010213920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:22,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99038855] [2021-12-21 23:57:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:22,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:22,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:22,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:22,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 23:57:22,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-21 23:57:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:22,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 23:57:22,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:57:22,883 INFO L353 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2021-12-21 23:57:22,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-21 23:57:22,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:22,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:23,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:23,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-21 23:57:23,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-21 23:57:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 23:57:23,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99038855] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:23,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:23,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 38 [2021-12-21 23:57:23,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081428098] [2021-12-21 23:57:23,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:23,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-21 23:57:23,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:23,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-21 23:57:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 23:57:23,474 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:24,113 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-12-21 23:57:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-21 23:57:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-21 23:57:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:24,114 INFO L225 Difference]: With dead ends: 115 [2021-12-21 23:57:24,114 INFO L226 Difference]: Without dead ends: 59 [2021-12-21 23:57:24,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=365, Invalid=3057, Unknown=0, NotChecked=0, Total=3422 [2021-12-21 23:57:24,116 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:24,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 384 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 284 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2021-12-21 23:57:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-21 23:57:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-12-21 23:57:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-12-21 23:57:24,119 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 34 [2021-12-21 23:57:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:24,119 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-12-21 23:57:24,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-12-21 23:57:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-21 23:57:24,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:24,121 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:24,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:24,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:24,334 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:24,335 INFO L85 PathProgramCache]: Analyzing trace with hash 143338355, now seen corresponding path program 2 times [2021-12-21 23:57:24,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:24,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513955914] [2021-12-21 23:57:24,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:24,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:24,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:24,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513955914] [2021-12-21 23:57:24,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513955914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:24,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155199110] [2021-12-21 23:57:24,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:24,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:24,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:24,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:24,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 23:57:24,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 23:57:24,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:24,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:24,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 23:57:24,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:24,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155199110] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:24,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:24,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-21 23:57:24,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35834782] [2021-12-21 23:57:24,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:24,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 23:57:24,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:24,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 23:57:24,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-21 23:57:24,909 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:25,077 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-12-21 23:57:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:57:25,078 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-21 23:57:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:25,078 INFO L225 Difference]: With dead ends: 68 [2021-12-21 23:57:25,078 INFO L226 Difference]: Without dead ends: 68 [2021-12-21 23:57:25,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-12-21 23:57:25,079 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 257 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:25,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 208 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:25,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-21 23:57:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-12-21 23:57:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-12-21 23:57:25,081 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 42 [2021-12-21 23:57:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:25,081 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-12-21 23:57:25,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-12-21 23:57:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 23:57:25,082 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:25,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:25,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:25,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:25,302 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:25,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:25,302 INFO L85 PathProgramCache]: Analyzing trace with hash 794074873, now seen corresponding path program 2 times [2021-12-21 23:57:25,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:25,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437765394] [2021-12-21 23:57:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:25,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:25,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437765394] [2021-12-21 23:57:25,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437765394] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:25,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059306983] [2021-12-21 23:57:25,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:25,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:25,386 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:25,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 23:57:25,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:25,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:25,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 23:57:25,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:25,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:25,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 23:57:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:25,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059306983] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:25,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:25,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-12-21 23:57:25,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151138229] [2021-12-21 23:57:25,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:25,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-21 23:57:25,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-21 23:57:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-21 23:57:25,734 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:25,933 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-12-21 23:57:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 23:57:25,934 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-21 23:57:25,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:25,934 INFO L225 Difference]: With dead ends: 66 [2021-12-21 23:57:25,934 INFO L226 Difference]: Without dead ends: 62 [2021-12-21 23:57:25,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-12-21 23:57:25,935 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 275 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:25,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 152 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:25,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-21 23:57:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-12-21 23:57:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-12-21 23:57:25,937 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2021-12-21 23:57:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:25,937 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-12-21 23:57:25,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-12-21 23:57:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-21 23:57:25,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:25,938 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:25,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:26,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-21 23:57:26,153 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:26,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:26,153 INFO L85 PathProgramCache]: Analyzing trace with hash -395309695, now seen corresponding path program 3 times [2021-12-21 23:57:26,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:26,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28627649] [2021-12-21 23:57:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:26,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:26,283 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:26,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:26,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28627649] [2021-12-21 23:57:26,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28627649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:26,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841484294] [2021-12-21 23:57:26,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:57:26,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:26,285 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:26,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 23:57:26,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 23:57:26,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:26,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 23:57:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:26,379 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 23:57:26,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 23:57:26,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 23:57:26,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 23:57:26,957 INFO L353 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-12-21 23:57:26,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2021-12-21 23:57:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:26,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:27,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:27,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 87 [2021-12-21 23:57:27,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-12-21 23:57:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 23:57:27,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841484294] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:27,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:27,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 43 [2021-12-21 23:57:27,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143401564] [2021-12-21 23:57:27,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:27,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-21 23:57:27,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-21 23:57:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 23:57:27,937 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:28,721 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2021-12-21 23:57:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-21 23:57:28,721 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-21 23:57:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:28,722 INFO L225 Difference]: With dead ends: 155 [2021-12-21 23:57:28,722 INFO L226 Difference]: Without dead ends: 74 [2021-12-21 23:57:28,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=494, Invalid=4336, Unknown=0, NotChecked=0, Total=4830 [2021-12-21 23:57:28,723 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 134 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:28,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 411 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 311 Invalid, 0 Unknown, 210 Unchecked, 0.1s Time] [2021-12-21 23:57:28,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-21 23:57:28,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-21 23:57:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-12-21 23:57:28,730 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 49 [2021-12-21 23:57:28,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:28,730 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-12-21 23:57:28,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:28,731 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-12-21 23:57:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 23:57:28,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:28,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:28,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:28,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-21 23:57:28,948 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:28,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2098265017, now seen corresponding path program 4 times [2021-12-21 23:57:28,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:28,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849588512] [2021-12-21 23:57:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:28,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 23:57:29,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:29,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849588512] [2021-12-21 23:57:29,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849588512] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:29,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272179596] [2021-12-21 23:57:29,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 23:57:29,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:29,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:29,084 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:29,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 23:57:29,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 23:57:29,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:29,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-21 23:57:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:29,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 23:57:29,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 23:57:29,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 23:57:29,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-21 23:57:29,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:29,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-12-21 23:57:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 23:57:29,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:30,341 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_429 (Array Int Int)) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_37| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|)) (<= (+ |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_429) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|)) 0))) is different from false [2021-12-21 23:57:30,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:30,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 23:57:30,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:30,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-21 23:57:30,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 23:57:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 23:57:31,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272179596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:31,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:31,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2021-12-21 23:57:31,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963576156] [2021-12-21 23:57:31,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:31,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-21 23:57:31,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-21 23:57:31,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1247, Unknown=1, NotChecked=72, Total=1482 [2021-12-21 23:57:31,222 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:31,991 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-12-21 23:57:31,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 23:57:31,992 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-21 23:57:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:31,992 INFO L225 Difference]: With dead ends: 96 [2021-12-21 23:57:31,992 INFO L226 Difference]: Without dead ends: 96 [2021-12-21 23:57:31,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=367, Invalid=2498, Unknown=1, NotChecked=104, Total=2970 [2021-12-21 23:57:31,993 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 175 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:31,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 434 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 500 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2021-12-21 23:57:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-21 23:57:31,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-12-21 23:57:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-12-21 23:57:31,995 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 57 [2021-12-21 23:57:31,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:31,995 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-12-21 23:57:31,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:31,995 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-12-21 23:57:31,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 23:57:31,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:31,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:32,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:32,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-21 23:57:32,196 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:32,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:32,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1346900531, now seen corresponding path program 3 times [2021-12-21 23:57:32,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:32,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304996054] [2021-12-21 23:57:32,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:32,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 23:57:32,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304996054] [2021-12-21 23:57:32,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304996054] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385486165] [2021-12-21 23:57:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:57:32,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:32,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:32,314 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:32,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 23:57:32,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 23:57:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 23:57:32,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 23:57:32,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:32,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-21 23:57:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 23:57:32,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385486165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:32,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:32,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2021-12-21 23:57:32,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307368019] [2021-12-21 23:57:32,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:32,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 23:57:32,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:32,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 23:57:32,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-12-21 23:57:32,781 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 27 states, 26 states have (on average 5.0) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:33,032 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-12-21 23:57:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 23:57:33,032 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.0) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 23:57:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:33,033 INFO L225 Difference]: With dead ends: 82 [2021-12-21 23:57:33,033 INFO L226 Difference]: Without dead ends: 78 [2021-12-21 23:57:33,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 23:57:33,037 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 372 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:33,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 200 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-21 23:57:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-21 23:57:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-21 23:57:33,055 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 61 [2021-12-21 23:57:33,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:33,056 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-21 23:57:33,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.0) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-21 23:57:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-21 23:57:33,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:33,056 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:33,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-21 23:57:33,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 23:57:33,273 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:33,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:33,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1797252275, now seen corresponding path program 4 times [2021-12-21 23:57:33,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:33,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415251180] [2021-12-21 23:57:33,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:33,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 23:57:33,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:33,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415251180] [2021-12-21 23:57:33,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415251180] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:33,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816974071] [2021-12-21 23:57:33,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 23:57:33,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:33,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:33,388 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:33,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 23:57:33,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 23:57:33,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:33,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 23:57:33,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:33,483 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 23:57:33,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 23:57:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:34,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 58 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:34,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816974071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:34,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:34,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 38 [2021-12-21 23:57:34,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672257921] [2021-12-21 23:57:34,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:34,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-21 23:57:34,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-21 23:57:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 23:57:34,481 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 38 states, 38 states have (on average 4.078947368421052) internal successors, (155), 38 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:34,831 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2021-12-21 23:57:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 23:57:34,831 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.078947368421052) internal successors, (155), 38 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-21 23:57:34,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:34,832 INFO L225 Difference]: With dead ends: 132 [2021-12-21 23:57:34,832 INFO L226 Difference]: Without dead ends: 82 [2021-12-21 23:57:34,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2021-12-21 23:57:34,833 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 101 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:34,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 274 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 243 Invalid, 0 Unknown, 185 Unchecked, 0.1s Time] [2021-12-21 23:57:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-21 23:57:34,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-21 23:57:34,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 81 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-12-21 23:57:34,834 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 68 [2021-12-21 23:57:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:34,834 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-12-21 23:57:34,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.078947368421052) internal successors, (155), 38 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-12-21 23:57:34,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-21 23:57:34,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:34,835 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:34,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:35,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:35,035 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:35,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:35,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1052266832, now seen corresponding path program 5 times [2021-12-21 23:57:35,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:35,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223894282] [2021-12-21 23:57:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:35,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:57:35,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:35,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223894282] [2021-12-21 23:57:35,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223894282] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:35,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288993579] [2021-12-21 23:57:35,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 23:57:35,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:35,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:35,647 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:35,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 23:57:35,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-21 23:57:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:35,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-21 23:57:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:35,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 23:57:36,558 INFO L353 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-21 23:57:36,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-21 23:57:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:57:36,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:37,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:37,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-21 23:57:37,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-21 23:57:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:57:37,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288993579] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:37,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:37,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 52 [2021-12-21 23:57:37,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052945189] [2021-12-21 23:57:37,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:37,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-21 23:57:37,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-21 23:57:37,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2493, Unknown=0, NotChecked=0, Total=2652 [2021-12-21 23:57:37,290 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:38,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:38,803 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2021-12-21 23:57:38,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-21 23:57:38,804 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-21 23:57:38,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:38,804 INFO L225 Difference]: With dead ends: 182 [2021-12-21 23:57:38,804 INFO L226 Difference]: Without dead ends: 120 [2021-12-21 23:57:38,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=450, Invalid=6356, Unknown=0, NotChecked=0, Total=6806 [2021-12-21 23:57:38,806 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 443 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:38,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 839 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 784 Invalid, 0 Unknown, 443 Unchecked, 0.3s Time] [2021-12-21 23:57:38,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-21 23:57:38,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2021-12-21 23:57:38,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:38,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-12-21 23:57:38,807 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 72 [2021-12-21 23:57:38,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:38,808 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-12-21 23:57:38,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:38,808 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-12-21 23:57:38,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 23:57:38,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:38,808 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:38,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:39,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-12-21 23:57:39,011 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:39,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1296737235, now seen corresponding path program 6 times [2021-12-21 23:57:39,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:39,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287464181] [2021-12-21 23:57:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:39,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:57:39,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287464181] [2021-12-21 23:57:39,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287464181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:39,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462846322] [2021-12-21 23:57:39,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 23:57:39,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:39,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:39,159 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:39,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 23:57:39,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-21 23:57:39,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:39,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-21 23:57:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:57:39,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:39,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-21 23:57:39,686 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:57:39,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462846322] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:39,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:39,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2021-12-21 23:57:39,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175314228] [2021-12-21 23:57:39,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:39,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 23:57:39,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:39,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 23:57:39,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-12-21 23:57:39,687 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 32 states, 31 states have (on average 5.129032258064516) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:39,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:39,940 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2021-12-21 23:57:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 23:57:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.129032258064516) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-12-21 23:57:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:39,941 INFO L225 Difference]: With dead ends: 96 [2021-12-21 23:57:39,941 INFO L226 Difference]: Without dead ends: 92 [2021-12-21 23:57:39,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 23:57:39,943 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 424 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:39,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 325 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:39,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-21 23:57:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-12-21 23:57:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:39,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-12-21 23:57:39,951 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 76 [2021-12-21 23:57:39,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:39,951 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-12-21 23:57:39,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.129032258064516) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-12-21 23:57:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-21 23:57:39,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:39,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:39,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:40,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:40,169 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:40,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2131874765, now seen corresponding path program 5 times [2021-12-21 23:57:40,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:40,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816636700] [2021-12-21 23:57:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:40,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:57:40,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:40,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816636700] [2021-12-21 23:57:40,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816636700] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:40,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067918572] [2021-12-21 23:57:40,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 23:57:40,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:40,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:40,408 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:40,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 23:57:40,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-21 23:57:40,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:40,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-21 23:57:40,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:40,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 23:57:41,237 INFO L353 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-21 23:57:41,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-21 23:57:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 5 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:57:41,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:41,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:41,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-21 23:57:41,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-21 23:57:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 5 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 23:57:41,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067918572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:41,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:41,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 48 [2021-12-21 23:57:41,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878836870] [2021-12-21 23:57:41,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:41,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-21 23:57:41,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:41,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-21 23:57:41,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 23:57:41,976 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:43,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:43,204 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2021-12-21 23:57:43,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-21 23:57:43,205 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-21 23:57:43,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:43,205 INFO L225 Difference]: With dead ends: 235 [2021-12-21 23:57:43,205 INFO L226 Difference]: Without dead ends: 104 [2021-12-21 23:57:43,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 125 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=371, Invalid=5791, Unknown=0, NotChecked=0, Total=6162 [2021-12-21 23:57:43,207 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:43,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 967 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 907 Invalid, 0 Unknown, 483 Unchecked, 0.3s Time] [2021-12-21 23:57:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-21 23:57:43,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-12-21 23:57:43,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-12-21 23:57:43,208 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 79 [2021-12-21 23:57:43,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:43,208 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-12-21 23:57:43,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-12-21 23:57:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 23:57:43,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:43,209 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:43,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:43,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:43,409 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash -418354157, now seen corresponding path program 6 times [2021-12-21 23:57:43,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:43,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830722381] [2021-12-21 23:57:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:43,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:43,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:43,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830722381] [2021-12-21 23:57:43,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830722381] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:43,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286866962] [2021-12-21 23:57:43,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 23:57:43,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:43,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:43,563 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:43,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 23:57:43,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-21 23:57:43,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:43,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 23:57:43,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:43,930 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:43,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:44,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-21 23:57:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:44,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286866962] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:44,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:44,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2021-12-21 23:57:44,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983934509] [2021-12-21 23:57:44,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:44,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 23:57:44,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 23:57:44,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 23:57:44,203 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 37 states, 36 states have (on average 4.916666666666667) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:44,433 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-12-21 23:57:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 23:57:44,434 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.916666666666667) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-21 23:57:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:44,434 INFO L225 Difference]: With dead ends: 113 [2021-12-21 23:57:44,434 INFO L226 Difference]: Without dead ends: 113 [2021-12-21 23:57:44,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2021-12-21 23:57:44,437 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 610 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:44,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 296 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 23:57:44,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-21 23:57:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2021-12-21 23:57:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-12-21 23:57:44,443 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 87 [2021-12-21 23:57:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:44,443 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-12-21 23:57:44,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.916666666666667) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-12-21 23:57:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 23:57:44,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:44,452 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:44,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:44,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-12-21 23:57:44,667 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:44,668 INFO L85 PathProgramCache]: Analyzing trace with hash -771190887, now seen corresponding path program 7 times [2021-12-21 23:57:44,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:44,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067636485] [2021-12-21 23:57:44,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:44,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:44,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:44,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067636485] [2021-12-21 23:57:44,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067636485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:44,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567005321] [2021-12-21 23:57:44,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 23:57:44,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:44,892 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:44,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 23:57:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-21 23:57:45,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:45,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:45,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 23:57:45,513 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:45,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567005321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:45,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:45,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2021-12-21 23:57:45,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871240510] [2021-12-21 23:57:45,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:45,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-21 23:57:45,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-21 23:57:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-12-21 23:57:45,515 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:45,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:45,951 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2021-12-21 23:57:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 23:57:45,951 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-21 23:57:45,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:45,952 INFO L225 Difference]: With dead ends: 111 [2021-12-21 23:57:45,952 INFO L226 Difference]: Without dead ends: 107 [2021-12-21 23:57:45,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2021-12-21 23:57:45,952 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 443 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:45,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 375 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-21 23:57:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-12-21 23:57:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2021-12-21 23:57:45,954 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 91 [2021-12-21 23:57:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:45,954 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2021-12-21 23:57:45,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:45,954 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2021-12-21 23:57:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-21 23:57:45,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:45,955 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:45,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:46,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:46,171 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash -767633183, now seen corresponding path program 7 times [2021-12-21 23:57:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:46,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701286967] [2021-12-21 23:57:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:46,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:46,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701286967] [2021-12-21 23:57:46,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701286967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:46,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804068567] [2021-12-21 23:57:46,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 23:57:46,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:46,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:46,418 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:46,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-21 23:57:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:46,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-21 23:57:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:46,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 23:57:47,360 INFO L353 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-21 23:57:47,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-21 23:57:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:47,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:47,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:47,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-21 23:57:47,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-21 23:57:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 23:57:48,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804068567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:48,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:48,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 53 [2021-12-21 23:57:48,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690132605] [2021-12-21 23:57:48,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:48,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-21 23:57:48,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:48,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-21 23:57:48,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2611, Unknown=0, NotChecked=0, Total=2756 [2021-12-21 23:57:48,021 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:49,058 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2021-12-21 23:57:49,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-21 23:57:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-12-21 23:57:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:49,065 INFO L225 Difference]: With dead ends: 275 [2021-12-21 23:57:49,065 INFO L226 Difference]: Without dead ends: 119 [2021-12-21 23:57:49,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 152 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=388, Invalid=6922, Unknown=0, NotChecked=0, Total=7310 [2021-12-21 23:57:49,068 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 97 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 498 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:49,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1214 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1038 Invalid, 0 Unknown, 498 Unchecked, 0.2s Time] [2021-12-21 23:57:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-21 23:57:49,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2021-12-21 23:57:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:49,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2021-12-21 23:57:49,074 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 94 [2021-12-21 23:57:49,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:49,074 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2021-12-21 23:57:49,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2021-12-21 23:57:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-21 23:57:49,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:49,076 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:49,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:49,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:49,292 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:49,292 INFO L85 PathProgramCache]: Analyzing trace with hash 913329115, now seen corresponding path program 8 times [2021-12-21 23:57:49,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:49,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31244518] [2021-12-21 23:57:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:49,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:49,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31244518] [2021-12-21 23:57:49,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31244518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:49,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293948711] [2021-12-21 23:57:49,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:49,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:49,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:49,496 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:49,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-21 23:57:49,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:49,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:49,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-21 23:57:49,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:49,961 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:49,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:50,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 23:57:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:50,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293948711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:50,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:50,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-12-21 23:57:50,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206188403] [2021-12-21 23:57:50,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:50,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 23:57:50,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 23:57:50,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 23:57:50,350 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:50,713 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2021-12-21 23:57:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 23:57:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-12-21 23:57:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:50,714 INFO L225 Difference]: With dead ends: 128 [2021-12-21 23:57:50,714 INFO L226 Difference]: Without dead ends: 128 [2021-12-21 23:57:50,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2021-12-21 23:57:50,715 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 563 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:50,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 397 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-12-21 23:57:50,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-12-21 23:57:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2021-12-21 23:57:50,717 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 102 [2021-12-21 23:57:50,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:50,717 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2021-12-21 23:57:50,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:50,717 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2021-12-21 23:57:50,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 23:57:50,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:50,718 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:50,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-21 23:57:50,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:50,935 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:50,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:50,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1419555999, now seen corresponding path program 8 times [2021-12-21 23:57:50,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:50,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088315029] [2021-12-21 23:57:50,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:50,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 28 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:51,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:51,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088315029] [2021-12-21 23:57:51,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088315029] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:51,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048730648] [2021-12-21 23:57:51,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 23:57:51,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:51,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:51,164 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:51,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-21 23:57:51,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 23:57:51,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:51,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-21 23:57:51,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:51,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:51,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-21 23:57:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:51,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048730648] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:51,997 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:51,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-12-21 23:57:51,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660345642] [2021-12-21 23:57:51,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:51,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 23:57:51,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:51,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 23:57:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 23:57:51,998 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 36 states, 35 states have (on average 5.057142857142857) internal successors, (177), 36 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:52,462 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2021-12-21 23:57:52,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 23:57:52,462 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.057142857142857) internal successors, (177), 36 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-21 23:57:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:52,463 INFO L225 Difference]: With dead ends: 126 [2021-12-21 23:57:52,463 INFO L226 Difference]: Without dead ends: 122 [2021-12-21 23:57:52,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2021-12-21 23:57:52,464 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 421 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:52,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 473 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:57:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-21 23:57:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2021-12-21 23:57:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 119 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2021-12-21 23:57:52,466 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 106 [2021-12-21 23:57:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:52,466 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2021-12-21 23:57:52,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.057142857142857) internal successors, (177), 36 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:52,466 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2021-12-21 23:57:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 23:57:52,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:52,467 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:52,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:52,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-21 23:57:52,683 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:52,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1744754663, now seen corresponding path program 9 times [2021-12-21 23:57:52,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:52,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794847724] [2021-12-21 23:57:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:52,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:53,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:53,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794847724] [2021-12-21 23:57:53,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794847724] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:53,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317293933] [2021-12-21 23:57:53,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:57:53,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:53,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:53,027 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:53,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-21 23:57:53,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 23:57:53,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:53,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-21 23:57:53,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:53,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 23:57:54,145 INFO L353 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-12-21 23:57:54,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 26 [2021-12-21 23:57:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 7 proven. 213 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:54,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:54,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:54,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-21 23:57:55,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-21 23:57:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 7 proven. 213 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-21 23:57:55,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317293933] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:57:55,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:57:55,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25] total 58 [2021-12-21 23:57:55,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300502133] [2021-12-21 23:57:55,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:57:55,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-12-21 23:57:55,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:57:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-12-21 23:57:55,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3149, Unknown=0, NotChecked=0, Total=3306 [2021-12-21 23:57:55,317 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:57:57,034 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2021-12-21 23:57:57,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-21 23:57:57,034 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-21 23:57:57,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:57:57,035 INFO L225 Difference]: With dead ends: 315 [2021-12-21 23:57:57,035 INFO L226 Difference]: Without dead ends: 134 [2021-12-21 23:57:57,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 177 SyntacticMatches, 13 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=429, Invalid=8501, Unknown=0, NotChecked=0, Total=8930 [2021-12-21 23:57:57,036 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 94 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:57:57,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 1536 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1446 Invalid, 0 Unknown, 577 Unchecked, 0.4s Time] [2021-12-21 23:57:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-21 23:57:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-12-21 23:57:57,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 125 states have (on average 1.04) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:57,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-12-21 23:57:57,040 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 109 [2021-12-21 23:57:57,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:57:57,040 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-12-21 23:57:57,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:57:57,040 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-12-21 23:57:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-21 23:57:57,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:57:57,043 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:57:57,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-21 23:57:57,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-21 23:57:57,260 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:57:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:57:57,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1230781985, now seen corresponding path program 10 times [2021-12-21 23:57:57,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:57:57,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648308439] [2021-12-21 23:57:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:57:57,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:57:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:57:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:57:57,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:57:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648308439] [2021-12-21 23:57:57,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648308439] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:57:57,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153617977] [2021-12-21 23:57:57,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 23:57:57,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:57:57,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:57:57,472 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:57:57,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-21 23:57:57,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 23:57:57,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:57:57,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-21 23:57:57,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:57:57,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 23:57:57,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 23:57:58,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-21 23:57:58,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-21 23:57:58,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:58,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-21 23:57:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 72 proven. 173 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:57:58,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:57:59,279 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_133| Int) (v_ArrVal_1122 (Array Int Int))) (or (<= (+ |v_ULTIMATE.start_cstrcmp_~s1#1.offset_133| 8) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1122) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_133|)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_~s1#1.offset_133|) (not (<= 0 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_133|)))) is different from false [2021-12-21 23:57:59,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:59,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-21 23:57:59,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:57:59,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-21 23:57:59,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 23:58:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 91 proven. 154 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:58:00,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153617977] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:00,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:58:00,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 23] total 62 [2021-12-21 23:58:00,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097060905] [2021-12-21 23:58:00,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:00,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-21 23:58:00,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:58:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-21 23:58:00,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=3376, Unknown=1, NotChecked=120, Total=3906 [2021-12-21 23:58:00,540 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 63 states, 62 states have (on average 4.370967741935484) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:01,680 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-12-21 23:58:01,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 23:58:01,681 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.370967741935484) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-21 23:58:01,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:01,681 INFO L225 Difference]: With dead ends: 156 [2021-12-21 23:58:01,682 INFO L226 Difference]: Without dead ends: 156 [2021-12-21 23:58:01,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1125, Invalid=5520, Unknown=1, NotChecked=160, Total=6806 [2021-12-21 23:58:01,682 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 1323 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:01,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1323 Valid, 863 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1571 Invalid, 0 Unknown, 152 Unchecked, 0.5s Time] [2021-12-21 23:58:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-12-21 23:58:01,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2021-12-21 23:58:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.0518518518518518) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-12-21 23:58:01,684 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 117 [2021-12-21 23:58:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:01,684 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-12-21 23:58:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.370967741935484) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-12-21 23:58:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-21 23:58:01,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:01,685 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:01,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-21 23:58:01,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-21 23:58:01,887 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:58:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:01,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1495539557, now seen corresponding path program 9 times [2021-12-21 23:58:01,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:58:01,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586580038] [2021-12-21 23:58:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:01,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:58:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:58:02,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:58:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586580038] [2021-12-21 23:58:02,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586580038] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:58:02,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53048053] [2021-12-21 23:58:02,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 23:58:02,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:02,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:58:02,110 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:58:02,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-21 23:58:02,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-21 23:58:02,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:02,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-21 23:58:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:58:02,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:03,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-21 23:58:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:58:03,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53048053] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:03,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:58:03,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2021-12-21 23:58:03,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758589864] [2021-12-21 23:58:03,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:03,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-21 23:58:03,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:58:03,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-21 23:58:03,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2021-12-21 23:58:03,359 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 47 states, 46 states have (on average 5.3478260869565215) internal successors, (246), 47 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:03,975 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2021-12-21 23:58:03,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 23:58:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.3478260869565215) internal successors, (246), 47 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-12-21 23:58:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:03,976 INFO L225 Difference]: With dead ends: 142 [2021-12-21 23:58:03,976 INFO L226 Difference]: Without dead ends: 138 [2021-12-21 23:58:03,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=746, Invalid=3160, Unknown=0, NotChecked=0, Total=3906 [2021-12-21 23:58:03,977 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 642 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:03,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 482 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 23:58:03,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-21 23:58:03,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-12-21 23:58:03,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.037037037037037) internal successors, (140), 137 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2021-12-21 23:58:03,979 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 121 [2021-12-21 23:58:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:03,979 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2021-12-21 23:58:03,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.3478260869565215) internal successors, (246), 47 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:03,979 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2021-12-21 23:58:03,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 23:58:03,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:03,979 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:03,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:04,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:04,180 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:58:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:04,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1467824155, now seen corresponding path program 10 times [2021-12-21 23:58:04,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:58:04,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763669331] [2021-12-21 23:58:04,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:04,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:58:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 186 proven. 141 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:58:04,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:58:04,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763669331] [2021-12-21 23:58:04,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763669331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:58:04,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83274894] [2021-12-21 23:58:04,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 23:58:04,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:58:04,544 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:58:04,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-21 23:58:04,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 23:58:04,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-21 23:58:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:04,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:04,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 23:58:04,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 23:58:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 236 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:58:05,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 228 proven. 99 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-21 23:58:05,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83274894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:05,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:58:05,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2021-12-21 23:58:05,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138709871] [2021-12-21 23:58:05,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:05,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 23:58:05,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:58:05,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 23:58:05,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1909, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 23:58:05,828 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 49 states, 49 states have (on average 4.836734693877551) internal successors, (237), 49 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:06,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:06,170 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2021-12-21 23:58:06,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 23:58:06,171 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.836734693877551) internal successors, (237), 49 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-21 23:58:06,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:06,171 INFO L225 Difference]: With dead ends: 235 [2021-12-21 23:58:06,171 INFO L226 Difference]: Without dead ends: 145 [2021-12-21 23:58:06,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=730, Invalid=2692, Unknown=0, NotChecked=0, Total=3422 [2021-12-21 23:58:06,172 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 136 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:06,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 413 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 23:58:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-21 23:58:06,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2021-12-21 23:58:06,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-12-21 23:58:06,187 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 128 [2021-12-21 23:58:06,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:06,187 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-12-21 23:58:06,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.836734693877551) internal successors, (237), 49 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:06,187 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-12-21 23:58:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-21 23:58:06,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:06,188 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:06,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:06,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:06,396 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:58:06,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:06,397 INFO L85 PathProgramCache]: Analyzing trace with hash -252767432, now seen corresponding path program 11 times [2021-12-21 23:58:06,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:58:06,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525166034] [2021-12-21 23:58:06,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:06,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:58:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 16 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 23:58:07,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:58:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525166034] [2021-12-21 23:58:07,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525166034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:58:07,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431819623] [2021-12-21 23:58:07,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 23:58:07,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:07,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:58:07,285 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:58:07,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-21 23:58:07,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-21 23:58:07,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:07,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-21 23:58:07,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:07,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 23:58:08,968 INFO L353 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-21 23:58:08,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-21 23:58:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 40 proven. 287 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 23:58:09,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:09,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:58:09,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-21 23:58:09,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-21 23:58:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 40 proven. 287 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 23:58:10,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431819623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:10,190 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:58:10,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 27, 27] total 75 [2021-12-21 23:58:10,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612457822] [2021-12-21 23:58:10,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:10,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-12-21 23:58:10,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:58:10,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-12-21 23:58:10,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=5345, Unknown=0, NotChecked=0, Total=5550 [2021-12-21 23:58:10,191 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:13,534 INFO L93 Difference]: Finished difference Result 314 states and 318 transitions. [2021-12-21 23:58:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-12-21 23:58:13,535 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2021-12-21 23:58:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:13,535 INFO L225 Difference]: With dead ends: 314 [2021-12-21 23:58:13,535 INFO L226 Difference]: Without dead ends: 196 [2021-12-21 23:58:13,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 221 SyntacticMatches, 12 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 3345 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=684, Invalid=15828, Unknown=0, NotChecked=0, Total=16512 [2021-12-21 23:58:13,537 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 208 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 3236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 823 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:13,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 2342 Invalid, 3236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2321 Invalid, 0 Unknown, 823 Unchecked, 0.7s Time] [2021-12-21 23:58:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-21 23:58:13,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 146. [2021-12-21 23:58:13,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.034965034965035) internal successors, (148), 145 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2021-12-21 23:58:13,540 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 132 [2021-12-21 23:58:13,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:13,541 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2021-12-21 23:58:13,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2021-12-21 23:58:13,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-21 23:58:13,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:13,542 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:13,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-21 23:58:13,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-12-21 23:58:13,752 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:58:13,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:13,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1652436117, now seen corresponding path program 12 times [2021-12-21 23:58:13,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:58:13,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515507117] [2021-12-21 23:58:13,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:13,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:58:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 66 proven. 290 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 23:58:14,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:58:14,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515507117] [2021-12-21 23:58:14,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515507117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:58:14,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554094367] [2021-12-21 23:58:14,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 23:58:14,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:58:14,080 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:58:14,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-21 23:58:14,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-21 23:58:14,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:14,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 23:58:14,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:14,678 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-21 23:58:14,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-21 23:58:15,548 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 91 proven. 265 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 23:58:15,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:16,609 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 120 proven. 236 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 23:58:16,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554094367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:16,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:58:16,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2021-12-21 23:58:16,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208155941] [2021-12-21 23:58:16,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:16,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-21 23:58:16,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:58:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-21 23:58:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2021-12-21 23:58:16,611 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 61 states, 60 states have (on average 5.266666666666667) internal successors, (316), 61 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:17,328 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-12-21 23:58:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-21 23:58:17,329 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 5.266666666666667) internal successors, (316), 61 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-21 23:58:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:17,330 INFO L225 Difference]: With dead ends: 156 [2021-12-21 23:58:17,330 INFO L226 Difference]: Without dead ends: 152 [2021-12-21 23:58:17,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1187, Invalid=4975, Unknown=0, NotChecked=0, Total=6162 [2021-12-21 23:58:17,330 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 927 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:17,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [927 Valid, 621 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 23:58:17,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-12-21 23:58:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-12-21 23:58:17,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 147 states have (on average 1.034013605442177) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-12-21 23:58:17,333 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 136 [2021-12-21 23:58:17,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:17,333 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-12-21 23:58:17,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 5.266666666666667) internal successors, (316), 61 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:17,333 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-12-21 23:58:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-21 23:58:17,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:17,334 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:17,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:17,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-21 23:58:17,552 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:58:17,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1190770075, now seen corresponding path program 11 times [2021-12-21 23:58:17,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:58:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128040358] [2021-12-21 23:58:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:17,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:58:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 23:58:17,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:58:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128040358] [2021-12-21 23:58:17,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128040358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:58:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664413223] [2021-12-21 23:58:17,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 23:58:17,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:17,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:58:17,928 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:58:17,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-21 23:58:18,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-21 23:58:18,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:18,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 23:58:18,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:18,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-21 23:58:19,330 INFO L353 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-12-21 23:58:19,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 30 [2021-12-21 23:58:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 23:58:19,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:20,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 23:58:20,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-12-21 23:58:20,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-21 23:58:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-21 23:58:20,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664413223] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:20,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:58:20,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 68 [2021-12-21 23:58:20,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468468464] [2021-12-21 23:58:20,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:20,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-21 23:58:20,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:58:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-21 23:58:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4375, Unknown=0, NotChecked=0, Total=4556 [2021-12-21 23:58:20,700 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 68 states, 68 states have (on average 4.205882352941177) internal successors, (286), 68 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:23,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:23,312 INFO L93 Difference]: Finished difference Result 395 states and 398 transitions. [2021-12-21 23:58:23,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-21 23:58:23,312 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.205882352941177) internal successors, (286), 68 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-21 23:58:23,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:23,313 INFO L225 Difference]: With dead ends: 395 [2021-12-21 23:58:23,313 INFO L226 Difference]: Without dead ends: 164 [2021-12-21 23:58:23,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 231 SyntacticMatches, 15 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=508, Invalid=12374, Unknown=0, NotChecked=0, Total=12882 [2021-12-21 23:58:23,314 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 119 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 3394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1110 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:23,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 2447 Invalid, 3394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2242 Invalid, 0 Unknown, 1110 Unchecked, 0.7s Time] [2021-12-21 23:58:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-21 23:58:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2021-12-21 23:58:23,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 155 states have (on average 1.032258064516129) internal successors, (160), 157 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2021-12-21 23:58:23,316 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 139 [2021-12-21 23:58:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:23,316 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2021-12-21 23:58:23,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.205882352941177) internal successors, (286), 68 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2021-12-21 23:58:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-21 23:58:23,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:23,317 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:23,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:23,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:23,517 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:58:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2139702699, now seen corresponding path program 12 times [2021-12-21 23:58:23,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:58:23,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842031212] [2021-12-21 23:58:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:23,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 23:58:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 23:58:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-21 23:58:23,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 23:58:23,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842031212] [2021-12-21 23:58:23,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842031212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 23:58:23,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873365120] [2021-12-21 23:58:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 23:58:23,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 23:58:23,787 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 23:58:23,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-21 23:58:24,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-21 23:58:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 23:58:24,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-21 23:58:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 23:58:24,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 23:58:24,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-21 23:58:24,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-21 23:58:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-21 23:58:25,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 23:58:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 153 proven. 261 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-21 23:58:26,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873365120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 23:58:26,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 23:58:26,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2021-12-21 23:58:26,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364843531] [2021-12-21 23:58:26,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 23:58:26,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-21 23:58:26,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 23:58:26,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-21 23:58:26,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=3661, Unknown=0, NotChecked=0, Total=4160 [2021-12-21 23:58:26,921 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 65 states, 64 states have (on average 5.265625) internal successors, (337), 65 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 23:58:27,889 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2021-12-21 23:58:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 23:58:27,890 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 5.265625) internal successors, (337), 65 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-12-21 23:58:27,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 23:58:27,890 INFO L225 Difference]: With dead ends: 173 [2021-12-21 23:58:27,890 INFO L226 Difference]: Without dead ends: 173 [2021-12-21 23:58:27,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1311, Invalid=5999, Unknown=0, NotChecked=0, Total=7310 [2021-12-21 23:58:27,891 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 1243 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 23:58:27,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 607 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 23:58:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-21 23:58:27,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2021-12-21 23:58:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2021-12-21 23:58:27,893 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 147 [2021-12-21 23:58:27,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 23:58:27,894 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2021-12-21 23:58:27,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 5.265625) internal successors, (337), 65 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 23:58:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2021-12-21 23:58:27,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-21 23:58:27,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 23:58:27,894 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 23:58:27,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-12-21 23:58:28,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 23:58:28,103 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-21 23:58:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 23:58:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1758125361, now seen corresponding path program 13 times [2021-12-21 23:58:28,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 23:58:28,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637445880] [2021-12-21 23:58:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 23:58:28,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms