./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ff03de63 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/openbsd_cstrnlen-alloca-1.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 b06b08d501323de811576605780ed72bdf24037e477195316df25396abb6c35b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 18:01:15,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:01:15,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:01:15,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:01:15,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:01:15,166 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:01:15,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:01:15,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:01:15,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:01:15,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:01:15,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:01:15,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:01:15,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:01:15,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:01:15,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:01:15,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:01:15,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:01:15,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:01:15,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:01:15,192 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:01:15,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:01:15,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:01:15,196 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:01:15,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:01:15,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:01:15,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:01:15,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:01:15,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:01:15,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:01:15,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:01:15,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:01:15,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:01:15,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:01:15,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:01:15,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:01:15,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:01:15,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:01:15,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:01:15,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:01:15,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:01:15,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:01:15,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:01:15,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:01:15,251 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:01:15,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:01:15,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:01:15,252 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:01:15,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:01:15,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:01:15,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:01:15,253 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:01:15,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:01:15,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:01:15,254 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:01:15,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:01:15,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:01:15,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:01:15,255 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:01:15,255 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:01:15,255 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:01:15,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:01:15,255 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:01:15,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:01:15,256 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:01:15,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:01:15,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:01:15,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:01:15,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:15,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:01:15,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:01:15,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:01:15,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:01:15,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:01:15,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b06b08d501323de811576605780ed72bdf24037e477195316df25396abb6c35b [2021-12-21 18:01:15,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:01:15,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:01:15,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:01:15,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:01:15,527 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:01:15,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-12-21 18:01:15,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/768b5c0da/76138d5f77b64104a132ac0e4940fd77/FLAG50e20bd36 [2021-12-21 18:01:15,946 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:01:15,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrnlen-alloca-1.i [2021-12-21 18:01:15,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/768b5c0da/76138d5f77b64104a132ac0e4940fd77/FLAG50e20bd36 [2021-12-21 18:01:16,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/768b5c0da/76138d5f77b64104a132ac0e4940fd77 [2021-12-21 18:01:16,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:01:16,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:01:16,360 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:16,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:01:16,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:01:16,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5780bf75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16, skipping insertion in model container [2021-12-21 18:01:16,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:01:16,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:01:16,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:16,644 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:01:16,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:01:16,708 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:01:16,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16 WrapperNode [2021-12-21 18:01:16,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:01:16,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:01:16,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:01:16,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:01:16,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,736 INFO L137 Inliner]: procedures = 117, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2021-12-21 18:01:16,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:01:16,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:01:16,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:01:16,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:01:16,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:01:16,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:01:16,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:01:16,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:01:16,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (1/1) ... [2021-12-21 18:01:16,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:01:16,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:16,795 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 18:01:16,803 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 18:01:16,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 18:01:16,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 18:01:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 18:01:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:01:16,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:01:16,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:01:16,941 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:01:16,942 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:01:17,095 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:01:17,107 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:01:17,107 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 18:01:17,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:17 BoogieIcfgContainer [2021-12-21 18:01:17,109 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:01:17,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:01:17,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:01:17,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:01:17,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:01:16" (1/3) ... [2021-12-21 18:01:17,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a600c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:01:17, skipping insertion in model container [2021-12-21 18:01:17,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:01:16" (2/3) ... [2021-12-21 18:01:17,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10a600c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:01:17, skipping insertion in model container [2021-12-21 18:01:17,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:17" (3/3) ... [2021-12-21 18:01:17,123 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrnlen-alloca-1.i [2021-12-21 18:01:17,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:01:17,127 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2021-12-21 18:01:17,158 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:01:17,164 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 18:01:17,164 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-12-21 18:01:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 28 states have internal predecessors, (35), 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 18:01:17,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:01:17,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:17,187 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:17,187 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:17,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029043, now seen corresponding path program 1 times [2021-12-21 18:01:17,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:17,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772871009] [2021-12-21 18:01:17,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:17,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:17,354 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 18:01:17,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:17,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772871009] [2021-12-21 18:01:17,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772871009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:17,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:17,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:01:17,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646694764] [2021-12-21 18:01:17,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:17,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:01:17,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:17,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:01:17,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:01:17,383 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 28 states have internal predecessors, (35), 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 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 18:01:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:17,463 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-21 18:01:17,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:01:17,466 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 18:01:17,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:17,473 INFO L225 Difference]: With dead ends: 27 [2021-12-21 18:01:17,474 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 18:01:17,476 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 18:01:17,479 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:17,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:17,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 18:01:17,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-21 18:01:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 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 18:01:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-21 18:01:17,505 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2021-12-21 18:01:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:17,506 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-21 18:01:17,506 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 18:01:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-21 18:01:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:01:17,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:17,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:17,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:01:17,507 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:17,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:17,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029044, now seen corresponding path program 1 times [2021-12-21 18:01:17,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:17,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656124886] [2021-12-21 18:01:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:17,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:17,610 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 18:01:17,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:17,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656124886] [2021-12-21 18:01:17,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656124886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:17,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:17,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:17,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824427465] [2021-12-21 18:01:17,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:17,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:17,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:17,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:17,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:17,616 INFO L87 Difference]: Start difference. First operand 25 states and 29 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 18:01:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:17,642 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-12-21 18:01:17,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:17,643 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 18:01:17,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:17,644 INFO L225 Difference]: With dead ends: 24 [2021-12-21 18:01:17,644 INFO L226 Difference]: Without dead ends: 24 [2021-12-21 18:01:17,644 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 18:01:17,648 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:17,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-21 18:01:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-21 18:01:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.4) internal successors, (28), 23 states have internal predecessors, (28), 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 18:01:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-12-21 18:01:17,656 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2021-12-21 18:01:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:17,656 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-12-21 18:01:17,656 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 18:01:17,657 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-12-21 18:01:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:01:17,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:17,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:17,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 18:01:17,658 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:17,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:17,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2021-12-21 18:01:17,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:17,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523427576] [2021-12-21 18:01:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:17,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:17,719 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 18:01:17,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:17,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523427576] [2021-12-21 18:01:17,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523427576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:17,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:17,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 18:01:17,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138462927] [2021-12-21 18:01:17,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:17,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:17,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:17,726 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. 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 18:01:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:17,746 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-12-21 18:01:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:17,747 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 18:01:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:17,748 INFO L225 Difference]: With dead ends: 41 [2021-12-21 18:01:17,748 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 18:01:17,749 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 18:01:17,754 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:17,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 18:01:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2021-12-21 18:01:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.391304347826087) internal successors, (32), 26 states have internal predecessors, (32), 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 18:01:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-21 18:01:17,761 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2021-12-21 18:01:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:17,761 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-21 18:01:17,762 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 18:01:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-21 18:01:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:01:17,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:17,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:17,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 18:01:17,763 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:17,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:17,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-21 18:01:17,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:17,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373495883] [2021-12-21 18:01:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:17,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:17,818 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 18:01:17,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:17,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373495883] [2021-12-21 18:01:17,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373495883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:17,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:17,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:17,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793577049] [2021-12-21 18:01:17,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:17,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:17,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:17,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:17,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:17,821 INFO L87 Difference]: Start difference. First operand 27 states and 32 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 18:01:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:17,865 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-12-21 18:01:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:17,866 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 18:01:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:17,867 INFO L225 Difference]: With dead ends: 45 [2021-12-21 18:01:17,867 INFO L226 Difference]: Without dead ends: 45 [2021-12-21 18:01:17,867 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 18:01:17,875 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:17,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 37 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:17,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-21 18:01:17,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2021-12-21 18:01:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.4) internal successors, (35), 28 states have internal predecessors, (35), 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 18:01:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-12-21 18:01:17,878 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2021-12-21 18:01:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:17,878 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-12-21 18:01:17,878 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 18:01:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-12-21 18:01:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:01:17,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:17,879 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:17,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 18:01:17,879 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1954750824, now seen corresponding path program 1 times [2021-12-21 18:01:17,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:17,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330761462] [2021-12-21 18:01:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:17,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:17,927 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 18:01:17,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:17,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330761462] [2021-12-21 18:01:17,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330761462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:17,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:17,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:17,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930020004] [2021-12-21 18:01:17,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:17,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:17,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:17,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:17,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:17,929 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 18:01:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:17,960 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-12-21 18:01:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 18:01:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:17,961 INFO L225 Difference]: With dead ends: 28 [2021-12-21 18:01:17,961 INFO L226 Difference]: Without dead ends: 28 [2021-12-21 18:01:17,961 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 18:01:17,962 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:17,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 31 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-21 18:01:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-21 18:01:17,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.36) internal successors, (34), 27 states have internal predecessors, (34), 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 18:01:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-21 18:01:17,965 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-12-21 18:01:17,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:17,966 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-21 18:01:17,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 18:01:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-21 18:01:17,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:01:17,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:17,969 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:17,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 18:01:17,969 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:17,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:17,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1954750823, now seen corresponding path program 1 times [2021-12-21 18:01:17,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:17,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354228171] [2021-12-21 18:01:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:17,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:18,064 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 18:01:18,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:18,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354228171] [2021-12-21 18:01:18,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354228171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:18,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:18,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:01:18,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683539731] [2021-12-21 18:01:18,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:18,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:01:18,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:18,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:01:18,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:01:18,066 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 18:01:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:18,111 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-12-21 18:01:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:01:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 18:01:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:18,112 INFO L225 Difference]: With dead ends: 38 [2021-12-21 18:01:18,112 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 18:01:18,113 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 18:01:18,115 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:18,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 41 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 18:01:18,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-12-21 18:01:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 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 18:01:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-12-21 18:01:18,120 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 11 [2021-12-21 18:01:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:18,120 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-12-21 18:01:18,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 18:01:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-12-21 18:01:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 18:01:18,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:18,121 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:18,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 18:01:18,121 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:18,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:18,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-21 18:01:18,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:18,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466824431] [2021-12-21 18:01:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:18,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:18,194 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 18:01:18,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:18,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466824431] [2021-12-21 18:01:18,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466824431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:18,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931552448] [2021-12-21 18:01:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:18,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:18,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:18,196 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 18:01:18,197 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 18:01:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:18,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 18:01:18,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:18,299 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:18,363 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 18:01:18,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:18,488 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 18:01:18,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931552448] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:18,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:18,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-21 18:01:18,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976339964] [2021-12-21 18:01:18,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:18,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:01:18,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:01:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:01:18,489 INFO L87 Difference]: Start difference. First operand 31 states and 38 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 18:01:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:18,610 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2021-12-21 18:01:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:18,611 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 18:01:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:18,612 INFO L225 Difference]: With dead ends: 65 [2021-12-21 18:01:18,612 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 18:01:18,612 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 18:01:18,613 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 81 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:18,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 145 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 18:01:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 28. [2021-12-21 18:01:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 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 18:01:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-21 18:01:18,615 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-12-21 18:01:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:18,615 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-21 18:01:18,615 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 18:01:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-21 18:01:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:01:18,616 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:18,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:18,638 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 18:01:18,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:18,828 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:18,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:18,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1485608773, now seen corresponding path program 1 times [2021-12-21 18:01:18,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:18,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848244118] [2021-12-21 18:01:18,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:18,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:18,878 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 18:01:18,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:18,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848244118] [2021-12-21 18:01:18,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848244118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:18,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:18,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 18:01:18,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158900525] [2021-12-21 18:01:18,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:18,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 18:01:18,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 18:01:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 18:01:18,881 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 18:01:18,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:18,917 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2021-12-21 18:01:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-12-21 18:01:18,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:18,918 INFO L225 Difference]: With dead ends: 58 [2021-12-21 18:01:18,918 INFO L226 Difference]: Without dead ends: 58 [2021-12-21 18:01:18,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 18:01:18,919 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 39 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:18,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 105 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-21 18:01:18,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-12-21 18:01:18,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 38 states have internal predecessors, (46), 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 18:01:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-12-21 18:01:18,922 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 14 [2021-12-21 18:01:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:18,922 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-12-21 18:01:18,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 18:01:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-12-21 18:01:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-21 18:01:18,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:18,923 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:18,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 18:01:18,923 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:18,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash -2108293945, now seen corresponding path program 1 times [2021-12-21 18:01:18,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:18,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632580693] [2021-12-21 18:01:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:18,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:18,980 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 18:01:18,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:18,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632580693] [2021-12-21 18:01:18,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632580693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:18,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:18,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:01:18,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023350997] [2021-12-21 18:01:18,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:18,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:01:18,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:18,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:01:18,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:01:18,982 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 18:01:19,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:19,031 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-12-21 18:01:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2021-12-21 18:01:19,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:19,033 INFO L225 Difference]: With dead ends: 46 [2021-12-21 18:01:19,040 INFO L226 Difference]: Without dead ends: 46 [2021-12-21 18:01:19,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 18:01:19,041 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:19,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 59 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-21 18:01:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 28. [2021-12-21 18:01:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 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 18:01:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-12-21 18:01:19,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2021-12-21 18:01:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:19,046 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-12-21 18:01:19,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 18:01:19,046 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-12-21 18:01:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 18:01:19,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 18:01:19,047 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash 439942402, now seen corresponding path program 1 times [2021-12-21 18:01:19,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285461409] [2021-12-21 18:01:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,099 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 18:01:19,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:19,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285461409] [2021-12-21 18:01:19,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285461409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:19,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:01:19,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:01:19,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461239013] [2021-12-21 18:01:19,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:19,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:01:19,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:19,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:01:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:19,100 INFO L87 Difference]: Start difference. First operand 28 states and 33 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 18:01:19,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:19,113 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-12-21 18:01:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:01:19,113 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 18:01:19,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:19,114 INFO L225 Difference]: With dead ends: 27 [2021-12-21 18:01:19,114 INFO L226 Difference]: Without dead ends: 24 [2021-12-21 18:01:19,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:01:19,114 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 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 18:01:19,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-21 18:01:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-21 18:01:19,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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 18:01:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-21 18:01:19,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-12-21 18:01:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:19,116 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-21 18:01:19,116 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 18:01:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-21 18:01:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 18:01:19,116 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:19,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:19,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 18:01:19,117 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash 755017713, now seen corresponding path program 1 times [2021-12-21 18:01:19,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:19,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362664774] [2021-12-21 18:01:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:19,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362664774] [2021-12-21 18:01:19,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362664774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:19,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619418900] [2021-12-21 18:01:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:19,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:19,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:19,164 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 18:01:19,165 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 18:01:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:19,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-21 18:01:19,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:19,235 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 18:01:19,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:19,361 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 18 treesize of output 18 [2021-12-21 18:01:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:19,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 11 [2021-12-21 18:01:19,708 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 16 treesize of output 12 [2021-12-21 18:01:19,714 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 20 treesize of output 18 [2021-12-21 18:01:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:19,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619418900] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:19,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:19,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2021-12-21 18:01:19,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746473538] [2021-12-21 18:01:19,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:19,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 18:01:19,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:19,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 18:01:19,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:01:19,728 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 18:01:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:20,015 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2021-12-21 18:01:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 18:01:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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) Word has length 17 [2021-12-21 18:01:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:20,016 INFO L225 Difference]: With dead ends: 53 [2021-12-21 18:01:20,016 INFO L226 Difference]: Without dead ends: 33 [2021-12-21 18:01:20,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:01:20,017 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:20,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 164 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 135 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2021-12-21 18:01:20,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-21 18:01:20,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-12-21 18:01:20,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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 18:01:20,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-12-21 18:01:20,021 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2021-12-21 18:01:20,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:20,021 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-12-21 18:01:20,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 18:01:20,022 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-12-21 18:01:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:01:20,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:20,023 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:20,063 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 18:01:20,238 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,SelfDestructingSolverStorable10 [2021-12-21 18:01:20,238 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:20,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:20,239 INFO L85 PathProgramCache]: Analyzing trace with hash 590461959, now seen corresponding path program 1 times [2021-12-21 18:01:20,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:20,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032371885] [2021-12-21 18:01:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:20,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:20,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032371885] [2021-12-21 18:01:20,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032371885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:20,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472586105] [2021-12-21 18:01:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:20,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:20,303 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 18:01:20,305 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 18:01:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 18:01:20,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:20,395 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 18:01:20,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-21 18:01:20,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 18:01:20,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:20,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472586105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:20,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:01:20,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-12-21 18:01:20,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407415046] [2021-12-21 18:01:20,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:20,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 18:01:20,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:20,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 18:01:20,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-21 18:01:20,460 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 18:01:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:20,528 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-12-21 18:01:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 18:01:20,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 18:01:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:20,529 INFO L225 Difference]: With dead ends: 37 [2021-12-21 18:01:20,529 INFO L226 Difference]: Without dead ends: 27 [2021-12-21 18:01:20,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:01:20,530 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:20,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 87 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:20,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-21 18:01:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-21 18:01:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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 18:01:20,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-12-21 18:01:20,532 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2021-12-21 18:01:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:20,532 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-12-21 18:01:20,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 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 18:01:20,533 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-12-21 18:01:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 18:01:20,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:20,533 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:20,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 18:01:20,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:20,751 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:20,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:20,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1013163785, now seen corresponding path program 1 times [2021-12-21 18:01:20,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:20,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380363669] [2021-12-21 18:01:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:20,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:20,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380363669] [2021-12-21 18:01:20,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380363669] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:20,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672755001] [2021-12-21 18:01:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:20,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:20,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:20,811 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 18:01:20,812 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 18:01:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 18:01:20,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:20,871 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:20,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:01:20,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672755001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:01:20,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:01:20,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2021-12-21 18:01:20,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762306192] [2021-12-21 18:01:20,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:01:20,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 18:01:20,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:20,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 18:01:20,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-21 18:01:20,956 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 18:01:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:21,013 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-12-21 18:01:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 18:01:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 18:01:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:21,013 INFO L225 Difference]: With dead ends: 42 [2021-12-21 18:01:21,014 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 18:01:21,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:01:21,014 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:21,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:01:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 18:01:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-21 18:01:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 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 18:01:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-12-21 18:01:21,016 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2021-12-21 18:01:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:21,017 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-12-21 18:01:21,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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 18:01:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-12-21 18:01:21,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 18:01:21,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:21,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:21,037 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 18:01:21,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:21,235 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:21,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:21,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1065366708, now seen corresponding path program 1 times [2021-12-21 18:01:21,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:21,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204441903] [2021-12-21 18:01:21,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:21,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:21,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:21,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204441903] [2021-12-21 18:01:21,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204441903] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:21,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131183053] [2021-12-21 18:01:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:21,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:21,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:21,404 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 18:01:21,447 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 18:01:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 18:01:21,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:21,588 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 18:01:22,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:01:22,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:01:22,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:22,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 14 [2021-12-21 18:01:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:22,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:22,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 29 treesize of output 25 [2021-12-21 18:01:22,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:01:22,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2021-12-21 18:01:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:22,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131183053] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:22,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:22,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 30 [2021-12-21 18:01:22,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449146649] [2021-12-21 18:01:22,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:22,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 18:01:22,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 18:01:22,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:01:22,434 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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 18:01:22,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:22,664 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-21 18:01:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:01:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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) Word has length 27 [2021-12-21 18:01:22,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:22,667 INFO L225 Difference]: With dead ends: 48 [2021-12-21 18:01:22,667 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 18:01:22,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 18:01:22,668 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:22,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 123 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2021-12-21 18:01:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 18:01:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-21 18:01:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 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 18:01:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-21 18:01:22,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-12-21 18:01:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:22,675 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-21 18:01:22,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 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 18:01:22,676 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-21 18:01:22,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-21 18:01:22,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:22,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:22,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:22,891 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,SelfDestructingSolverStorable13 [2021-12-21 18:01:22,892 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash -711322097, now seen corresponding path program 2 times [2021-12-21 18:01:22,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:22,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343788136] [2021-12-21 18:01:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:22,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:22,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343788136] [2021-12-21 18:01:22,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343788136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:22,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570903213] [2021-12-21 18:01:22,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:01:22,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:22,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:22,970 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 18:01:22,972 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 18:01:23,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:01:23,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:23,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-21 18:01:23,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:23,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:23,331 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 18:01:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:23,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570903213] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:23,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:23,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 18 [2021-12-21 18:01:23,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792050568] [2021-12-21 18:01:23,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:23,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 18:01:23,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:23,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 18:01:23,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:01:23,364 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 19 states have internal predecessors, (66), 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 18:01:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:23,521 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-12-21 18:01:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:01:23,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 19 states have internal predecessors, (66), 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 18:01:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:23,522 INFO L225 Difference]: With dead ends: 41 [2021-12-21 18:01:23,522 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 18:01:23,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-12-21 18:01:23,524 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 172 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:23,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 104 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 18:01:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-12-21 18:01:23,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 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 18:01:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-12-21 18:01:23,525 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2021-12-21 18:01:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:23,526 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-12-21 18:01:23,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 19 states have internal predecessors, (66), 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 18:01:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-12-21 18:01:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-21 18:01:23,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:23,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:23,545 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 18:01:23,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 18:01:23,732 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2043154713, now seen corresponding path program 3 times [2021-12-21 18:01:23,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560721576] [2021-12-21 18:01:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:23,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:23,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:23,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560721576] [2021-12-21 18:01:23,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560721576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:23,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941110363] [2021-12-21 18:01:23,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:01:23,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:23,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:23,888 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 18:01:23,889 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 18:01:23,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 18:01:23,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:23,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-21 18:01:23,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:24,098 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 18:01:24,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-21 18:01:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:24,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:24,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 13 [2021-12-21 18:01:24,353 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 26 treesize of output 22 [2021-12-21 18:01:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:24,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941110363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:24,476 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:24,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2021-12-21 18:01:24,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898878088] [2021-12-21 18:01:24,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:24,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 18:01:24,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 18:01:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:01:24,478 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 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 18:01:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:24,709 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-12-21 18:01:24,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:01:24,709 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 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 37 [2021-12-21 18:01:24,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:24,710 INFO L225 Difference]: With dead ends: 64 [2021-12-21 18:01:24,710 INFO L226 Difference]: Without dead ends: 45 [2021-12-21 18:01:24,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 18:01:24,711 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:24,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 220 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 229 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2021-12-21 18:01:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-21 18:01:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-21 18:01:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 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 18:01:24,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-12-21 18:01:24,713 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2021-12-21 18:01:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:24,713 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-12-21 18:01:24,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 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 18:01:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-12-21 18:01:24,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 18:01:24,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:24,714 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:24,731 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 18:01:24,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:24,923 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:24,924 INFO L85 PathProgramCache]: Analyzing trace with hash 145875434, now seen corresponding path program 4 times [2021-12-21 18:01:24,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:24,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554708963] [2021-12-21 18:01:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:24,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:24,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:25,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:25,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554708963] [2021-12-21 18:01:25,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554708963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:25,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38792895] [2021-12-21 18:01:25,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:01:25,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:25,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:25,053 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 18:01:25,053 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 18:01:25,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:01:25,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:25,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-21 18:01:25,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:25,127 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:25,234 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 16 treesize of output 12 [2021-12-21 18:01:25,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:25,452 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 18:01:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:25,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:25,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 13 [2021-12-21 18:01:25,955 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 26 treesize of output 22 [2021-12-21 18:01:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:26,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38792895] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:26,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:26,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 34 [2021-12-21 18:01:26,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157091899] [2021-12-21 18:01:26,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:26,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-21 18:01:26,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-21 18:01:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 18:01:26,363 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 35 states, 34 states have (on average 3.264705882352941) internal successors, (111), 35 states have internal predecessors, (111), 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 18:01:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:26,887 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-12-21 18:01:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:01:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.264705882352941) internal successors, (111), 35 states have internal predecessors, (111), 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 41 [2021-12-21 18:01:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:26,888 INFO L225 Difference]: With dead ends: 57 [2021-12-21 18:01:26,888 INFO L226 Difference]: Without dead ends: 57 [2021-12-21 18:01:26,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=431, Invalid=1825, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 18:01:26,891 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 268 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:26,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 259 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 386 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2021-12-21 18:01:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-21 18:01:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-12-21 18:01:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 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 18:01:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-12-21 18:01:26,898 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 41 [2021-12-21 18:01:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:26,898 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-12-21 18:01:26,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.264705882352941) internal successors, (111), 35 states have internal predecessors, (111), 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 18:01:26,898 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-12-21 18:01:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 18:01:26,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:26,900 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:26,919 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 18:01:27,107 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,SelfDestructingSolverStorable16 [2021-12-21 18:01:27,108 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1439981286, now seen corresponding path program 5 times [2021-12-21 18:01:27,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:27,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089052274] [2021-12-21 18:01:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:27,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 54 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:27,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:27,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089052274] [2021-12-21 18:01:27,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089052274] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:27,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007238549] [2021-12-21 18:01:27,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:01:27,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:27,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:27,214 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 18:01:27,215 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 18:01:27,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-21 18:01:27,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 18:01:27,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:27,292 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:27,584 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:27,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:27,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007238549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:27,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:27,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2021-12-21 18:01:27,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919897983] [2021-12-21 18:01:27,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:27,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-21 18:01:27,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:27,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-21 18:01:27,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-12-21 18:01:27,805 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 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 18:01:28,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:28,036 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-12-21 18:01:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:01:28,037 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 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) Word has length 53 [2021-12-21 18:01:28,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:28,037 INFO L225 Difference]: With dead ends: 90 [2021-12-21 18:01:28,037 INFO L226 Difference]: Without dead ends: 61 [2021-12-21 18:01:28,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 18:01:28,038 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:28,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 190 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-21 18:01:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2021-12-21 18:01:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 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 18:01:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-12-21 18:01:28,040 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2021-12-21 18:01:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:28,040 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-12-21 18:01:28,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.214285714285714) internal successors, (118), 28 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 18:01:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-12-21 18:01:28,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-21 18:01:28,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:28,041 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:28,059 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 18:01:28,259 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,SelfDestructingSolverStorable17 [2021-12-21 18:01:28,259 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:28,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:28,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1247620637, now seen corresponding path program 6 times [2021-12-21 18:01:28,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:28,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003505501] [2021-12-21 18:01:28,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:28,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:28,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003505501] [2021-12-21 18:01:28,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003505501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:28,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437234656] [2021-12-21 18:01:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:01:28,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:28,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:28,449 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 18:01:28,454 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 18:01:28,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-21 18:01:28,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:28,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 18:01:28,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:28,702 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 18:01:28,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-21 18:01:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:28,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:29,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 13 [2021-12-21 18:01:29,003 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 26 treesize of output 22 [2021-12-21 18:01:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:29,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437234656] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:29,133 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:29,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2021-12-21 18:01:29,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109775298] [2021-12-21 18:01:29,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:29,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 18:01:29,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 18:01:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-12-21 18:01:29,134 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 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 18:01:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:29,488 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2021-12-21 18:01:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 18:01:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 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 18:01:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:29,488 INFO L225 Difference]: With dead ends: 96 [2021-12-21 18:01:29,488 INFO L226 Difference]: Without dead ends: 65 [2021-12-21 18:01:29,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 18:01:29,489 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:29,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 407 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 440 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-12-21 18:01:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-21 18:01:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2021-12-21 18:01:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 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 18:01:29,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-12-21 18:01:29,491 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 57 [2021-12-21 18:01:29,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:29,491 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-12-21 18:01:29,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 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 18:01:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-12-21 18:01:29,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 18:01:29,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:29,492 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:29,510 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 18:01:29,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:29,707 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:29,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:29,708 INFO L85 PathProgramCache]: Analyzing trace with hash 757760416, now seen corresponding path program 7 times [2021-12-21 18:01:29,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:29,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137053306] [2021-12-21 18:01:29,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:29,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:29,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137053306] [2021-12-21 18:01:29,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137053306] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975009382] [2021-12-21 18:01:29,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 18:01:29,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:29,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:29,877 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 18:01:29,878 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 18:01:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:29,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 18:01:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:30,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:30,478 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 18:01:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:30,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975009382] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:30,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:30,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 30 [2021-12-21 18:01:30,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155961466] [2021-12-21 18:01:30,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:30,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-21 18:01:30,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-21 18:01:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-12-21 18:01:30,524 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 31 states, 30 states have (on average 4.2) internal successors, (126), 31 states have internal predecessors, (126), 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 18:01:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:30,870 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-12-21 18:01:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:01:30,871 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.2) internal successors, (126), 31 states have internal predecessors, (126), 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 18:01:30,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:30,872 INFO L225 Difference]: With dead ends: 71 [2021-12-21 18:01:30,872 INFO L226 Difference]: Without dead ends: 71 [2021-12-21 18:01:30,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 18:01:30,874 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 349 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:30,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 342 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:01:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-21 18:01:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-12-21 18:01:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 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 18:01:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-21 18:01:30,877 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2021-12-21 18:01:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:30,877 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-21 18:01:30,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.2) internal successors, (126), 31 states have internal predecessors, (126), 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 18:01:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-21 18:01:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 18:01:30,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:30,878 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:30,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:01:31,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:31,083 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:31,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:31,084 INFO L85 PathProgramCache]: Analyzing trace with hash 586394040, now seen corresponding path program 8 times [2021-12-21 18:01:31,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:31,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133145971] [2021-12-21 18:01:31,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:31,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:31,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133145971] [2021-12-21 18:01:31,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133145971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510549701] [2021-12-21 18:01:31,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:01:31,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:31,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:31,380 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 18:01:31,381 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 18:01:31,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:01:31,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:31,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-21 18:01:31,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:31,617 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 18:01:31,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2021-12-21 18:01:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:31,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:31,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 13 [2021-12-21 18:01:31,897 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 26 treesize of output 22 [2021-12-21 18:01:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 23 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:32,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510549701] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:32,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:32,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2021-12-21 18:01:32,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219010141] [2021-12-21 18:01:32,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:32,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 18:01:32,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:32,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 18:01:32,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 18:01:32,125 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 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 18:01:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:32,653 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-12-21 18:01:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 18:01:32,653 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 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 67 [2021-12-21 18:01:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:32,653 INFO L225 Difference]: With dead ends: 112 [2021-12-21 18:01:32,653 INFO L226 Difference]: Without dead ends: 75 [2021-12-21 18:01:32,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2021-12-21 18:01:32,655 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 182 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:32,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 657 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 685 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2021-12-21 18:01:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-21 18:01:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-12-21 18:01:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 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 18:01:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-12-21 18:01:32,657 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2021-12-21 18:01:32,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:32,657 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-12-21 18:01:32,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.3333333333333335) internal successors, (110), 33 states have internal predecessors, (110), 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 18:01:32,657 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-12-21 18:01:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 18:01:32,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:32,657 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:32,675 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 18:01:32,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-21 18:01:32,875 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:32,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:32,875 INFO L85 PathProgramCache]: Analyzing trace with hash 8172923, now seen corresponding path program 9 times [2021-12-21 18:01:32,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:32,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006516042] [2021-12-21 18:01:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:32,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:33,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:33,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006516042] [2021-12-21 18:01:33,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006516042] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:33,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804207402] [2021-12-21 18:01:33,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 18:01:33,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:33,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:33,117 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 18:01:33,118 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 18:01:33,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-21 18:01:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:33,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 18:01:33,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:33,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:33,917 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 18:01:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:33,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804207402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:33,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:33,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 41 [2021-12-21 18:01:33,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792479966] [2021-12-21 18:01:33,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:33,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-21 18:01:33,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:33,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-21 18:01:33,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1463, Unknown=0, NotChecked=0, Total=1722 [2021-12-21 18:01:33,968 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 42 states, 41 states have (on average 4.365853658536586) internal successors, (179), 42 states have internal predecessors, (179), 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 18:01:34,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:34,249 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-12-21 18:01:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:01:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.365853658536586) internal successors, (179), 42 states have internal predecessors, (179), 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 71 [2021-12-21 18:01:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:34,250 INFO L225 Difference]: With dead ends: 81 [2021-12-21 18:01:34,250 INFO L226 Difference]: Without dead ends: 81 [2021-12-21 18:01:34,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=511, Invalid=2039, Unknown=0, NotChecked=0, Total=2550 [2021-12-21 18:01:34,251 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 394 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:34,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 323 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:01:34,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-21 18:01:34,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-12-21 18:01:34,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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 18:01:34,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-12-21 18:01:34,253 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 71 [2021-12-21 18:01:34,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:34,253 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-12-21 18:01:34,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.365853658536586) internal successors, (179), 42 states have internal predecessors, (179), 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 18:01:34,254 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-12-21 18:01:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 18:01:34,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:34,254 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:34,274 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 18:01:34,473 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,SelfDestructingSolverStorable21 [2021-12-21 18:01:34,474 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -813150893, now seen corresponding path program 10 times [2021-12-21 18:01:34,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:34,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624027896] [2021-12-21 18:01:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:34,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 27 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:34,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:34,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624027896] [2021-12-21 18:01:34,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624027896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:34,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029965959] [2021-12-21 18:01:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 18:01:34,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:34,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:34,724 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 18:01:34,724 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 18:01:34,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 18:01:34,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:34,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-21 18:01:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:34,810 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:35,131 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 18:01:35,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 18:01:35,778 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-21 18:01:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 135 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:35,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:36,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 11 [2021-12-21 18:01:36,386 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 20 treesize of output 18 [2021-12-21 18:01:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 102 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:36,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029965959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:36,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:36,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 55 [2021-12-21 18:01:36,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438305405] [2021-12-21 18:01:36,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:36,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-21 18:01:36,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-21 18:01:36,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 18:01:36,986 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 55 states, 55 states have (on average 3.8363636363636364) internal successors, (211), 55 states have internal predecessors, (211), 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 18:01:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:37,723 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2021-12-21 18:01:37,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 18:01:37,724 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.8363636363636364) internal successors, (211), 55 states have internal predecessors, (211), 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 77 [2021-12-21 18:01:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:37,725 INFO L225 Difference]: With dead ends: 128 [2021-12-21 18:01:37,725 INFO L226 Difference]: Without dead ends: 85 [2021-12-21 18:01:37,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=548, Invalid=5002, Unknown=0, NotChecked=0, Total=5550 [2021-12-21 18:01:37,727 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 115 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:37,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 911 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 544 Invalid, 0 Unknown, 150 Unchecked, 0.2s Time] [2021-12-21 18:01:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-21 18:01:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-12-21 18:01:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 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 18:01:37,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-12-21 18:01:37,731 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2021-12-21 18:01:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:37,731 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-12-21 18:01:37,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.8363636363636364) internal successors, (211), 55 states have internal predecessors, (211), 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 18:01:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-12-21 18:01:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-21 18:01:37,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:37,732 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:37,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-21 18:01:37,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:37,935 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1404289366, now seen corresponding path program 11 times [2021-12-21 18:01:37,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:37,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822777193] [2021-12-21 18:01:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:37,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:38,175 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:38,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822777193] [2021-12-21 18:01:38,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822777193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:38,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796774254] [2021-12-21 18:01:38,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 18:01:38,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:38,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:38,177 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 18:01:38,178 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 18:01:38,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-21 18:01:38,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:38,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-21 18:01:38,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:38,318 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 66 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:38,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 91 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:39,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796774254] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:39,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:39,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 48 [2021-12-21 18:01:39,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574564331] [2021-12-21 18:01:39,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:39,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 18:01:39,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 18:01:39,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 18:01:39,498 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 49 states, 48 states have (on average 4.770833333333333) internal successors, (229), 49 states have internal predecessors, (229), 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 18:01:39,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:39,903 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-12-21 18:01:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 18:01:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 4.770833333333333) internal successors, (229), 49 states have internal predecessors, (229), 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 81 [2021-12-21 18:01:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:39,904 INFO L225 Difference]: With dead ends: 91 [2021-12-21 18:01:39,904 INFO L226 Difference]: Without dead ends: 91 [2021-12-21 18:01:39,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=650, Invalid=2772, Unknown=0, NotChecked=0, Total=3422 [2021-12-21 18:01:39,905 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 369 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:39,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 628 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 18:01:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-21 18:01:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2021-12-21 18:01:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 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 18:01:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2021-12-21 18:01:39,907 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 81 [2021-12-21 18:01:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:39,907 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2021-12-21 18:01:39,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 4.770833333333333) internal successors, (229), 49 states have internal predecessors, (229), 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 18:01:39,907 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2021-12-21 18:01:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 18:01:39,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:01:39,908 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:39,925 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 18:01:40,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:40,109 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 3 more)] === [2021-12-21 18:01:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:01:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1023424274, now seen corresponding path program 12 times [2021-12-21 18:01:40,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:01:40,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693007291] [2021-12-21 18:01:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:01:40,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:01:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:01:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:01:40,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:01:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693007291] [2021-12-21 18:01:40,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693007291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:01:40,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018174506] [2021-12-21 18:01:40,475 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 18:01:40,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:01:40,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:01:40,476 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 18:01:40,495 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 18:01:40,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-21 18:01:40,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:01:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-21 18:01:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:01:40,906 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-21 18:01:41,016 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 15 treesize of output 11 [2021-12-21 18:01:41,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 18:01:41,127 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 18:01:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-12-21 18:01:41,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:01:41,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 11 [2021-12-21 18:01:41,908 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 20 treesize of output 18 [2021-12-21 18:01:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-12-21 18:01:42,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018174506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:01:42,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 18:01:42,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8, 8] total 37 [2021-12-21 18:01:42,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984554789] [2021-12-21 18:01:42,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 18:01:42,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 18:01:42,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:01:42,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 18:01:42,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1242, Unknown=0, NotChecked=0, Total=1332 [2021-12-21 18:01:42,166 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 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 18:01:44,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:01:44,510 INFO L93 Difference]: Finished difference Result 143 states and 144 transitions. [2021-12-21 18:01:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-21 18:01:44,510 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 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 18:01:44,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:01:44,511 INFO L225 Difference]: With dead ends: 143 [2021-12-21 18:01:44,511 INFO L226 Difference]: Without dead ends: 0 [2021-12-21 18:01:44,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1058, Invalid=6082, Unknown=0, NotChecked=0, Total=7140 [2021-12-21 18:01:44,512 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 165 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1290 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 18:01:44,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 679 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1290 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2021-12-21 18:01:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-21 18:01:44,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-21 18:01:44,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 18:01:44,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-21 18:01:44,513 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 87 [2021-12-21 18:01:44,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:01:44,513 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-21 18:01:44,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.4864864864864864) internal successors, (129), 37 states have internal predecessors, (129), 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 18:01:44,513 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-21 18:01:44,514 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-21 18:01:44,515 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (6 of 7 remaining) [2021-12-21 18:01:44,516 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (5 of 7 remaining) [2021-12-21 18:01:44,516 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (4 of 7 remaining) [2021-12-21 18:01:44,516 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (3 of 7 remaining) [2021-12-21 18:01:44,516 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (2 of 7 remaining) [2021-12-21 18:01:44,516 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (1 of 7 remaining) [2021-12-21 18:01:44,516 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2021-12-21 18:01:44,533 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 18:01:44,733 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,SelfDestructingSolverStorable24 [2021-12-21 18:01:44,736 INFO L732 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:01:44,737 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 18:01:44,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 06:01:44 BoogieIcfgContainer [2021-12-21 18:01:44,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 18:01:44,740 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 18:01:44,740 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 18:01:44,740 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 18:01:44,740 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:01:17" (3/4) ... [2021-12-21 18:01:44,742 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-21 18:01:44,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-12-21 18:01:44,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-12-21 18:01:44,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-21 18:01:44,750 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-21 18:01:44,779 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 18:01:44,780 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 18:01:44,780 INFO L158 Benchmark]: Toolchain (without parser) took 28422.40ms. Allocated memory was 92.3MB in the beginning and 163.6MB in the end (delta: 71.3MB). Free memory was 55.1MB in the beginning and 87.6MB in the end (delta: -32.5MB). Peak memory consumption was 39.2MB. Max. memory is 16.1GB. [2021-12-21 18:01:44,780 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 92.3MB. Free memory was 73.0MB in the beginning and 72.9MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:01:44,781 INFO L158 Benchmark]: CACSL2BoogieTranslator took 348.14ms. Allocated memory is still 92.3MB. Free memory was 54.9MB in the beginning and 63.2MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 18:01:44,781 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.85ms. Allocated memory is still 92.3MB. Free memory was 63.2MB in the beginning and 61.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 18:01:44,782 INFO L158 Benchmark]: Boogie Preprocessor took 21.03ms. Allocated memory is still 92.3MB. Free memory was 61.1MB in the beginning and 60.2MB in the end (delta: 905.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 18:01:44,782 INFO L158 Benchmark]: RCFGBuilder took 347.98ms. Allocated memory is still 92.3MB. Free memory was 59.9MB in the beginning and 48.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 18:01:44,782 INFO L158 Benchmark]: TraceAbstraction took 27628.49ms. Allocated memory was 92.3MB in the beginning and 163.6MB in the end (delta: 71.3MB). Free memory was 48.1MB in the beginning and 90.6MB in the end (delta: -42.5MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2021-12-21 18:01:44,782 INFO L158 Benchmark]: Witness Printer took 39.91ms. Allocated memory is still 163.6MB. Free memory was 90.6MB in the beginning and 87.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 18:01:44,788 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 92.3MB. Free memory was 73.0MB in the beginning and 72.9MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 348.14ms. Allocated memory is still 92.3MB. Free memory was 54.9MB in the beginning and 63.2MB in the end (delta: -8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.85ms. Allocated memory is still 92.3MB. Free memory was 63.2MB in the beginning and 61.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.03ms. Allocated memory is still 92.3MB. Free memory was 61.1MB in the beginning and 60.2MB in the end (delta: 905.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 347.98ms. Allocated memory is still 92.3MB. Free memory was 59.9MB in the beginning and 48.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 27628.49ms. Allocated memory was 92.3MB in the beginning and 163.6MB in the end (delta: 71.3MB). Free memory was 48.1MB in the beginning and 90.6MB in the end (delta: -42.5MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. * Witness Printer took 39.91ms. Allocated memory is still 163.6MB. Free memory was 90.6MB in the beginning and 87.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 534]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 537]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 27.6s, OverallIterations: 25, TraceHistogramMax: 9, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 7.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2870 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2870 mSDsluCounter, 5695 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 412 IncrementalHoareTripleChecker+Unchecked, 5083 mSDsCounter, 513 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5913 IncrementalHoareTripleChecker+Invalid, 6838 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 513 mSolverCounterUnsat, 612 mSDtfsCounter, 5913 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1913 GetRequests, 1230 SyntacticMatches, 24 SemanticMatches, 659 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 5310 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=24, InterpolantAutomatonStates: 322, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 150 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 14.3s InterpolantComputationTime, 1622 NumberOfCodeBlocks, 1599 NumberOfCodeBlocksAsserted, 77 NumberOfCheckSat, 2285 ConstructedInterpolants, 161 QuantifiedInterpolants, 23297 SizeOfPredicates, 202 NumberOfNonLiveVariables, 2679 ConjunctsInSsa, 593 ConjunctsInUnsatCore, 55 InterpolantComputations, 11 PerfectInterpolantSequences, 1621/4503 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-21 18:01:44,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE