./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b 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/cstrcat-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 19:31:07,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 19:31:07,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 19:31:07,079 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 19:31:07,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 19:31:07,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 19:31:07,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 19:31:07,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 19:31:07,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 19:31:07,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 19:31:07,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 19:31:07,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 19:31:07,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 19:31:07,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 19:31:07,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 19:31:07,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 19:31:07,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 19:31:07,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 19:31:07,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 19:31:07,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 19:31:07,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 19:31:07,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 19:31:07,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 19:31:07,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 19:31:07,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 19:31:07,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 19:31:07,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 19:31:07,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 19:31:07,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 19:31:07,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 19:31:07,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 19:31:07,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 19:31:07,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 19:31:07,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 19:31:07,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 19:31:07,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 19:31:07,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 19:31:07,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 19:31:07,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 19:31:07,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 19:31:07,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 19:31:07,112 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-14 19:31:07,130 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 19:31:07,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 19:31:07,131 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 19:31:07,131 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 19:31:07,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 19:31:07,132 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 19:31:07,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 19:31:07,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 19:31:07,133 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 19:31:07,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 19:31:07,133 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 19:31:07,133 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-14 19:31:07,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 19:31:07,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 19:31:07,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 19:31:07,134 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-14 19:31:07,134 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-14 19:31:07,134 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-14 19:31:07,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 19:31:07,134 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 19:31:07,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 19:31:07,135 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 19:31:07,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 19:31:07,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 19:31:07,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 19:31:07,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:31:07,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 19:31:07,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 19:31:07,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 19:31:07,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 19:31:07,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 19:31:07,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bfd8ca9d9dda86f57445168715d124831c95b647e7c1b1093bb129b0384cce9e [2021-12-14 19:31:07,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 19:31:07,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 19:31:07,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 19:31:07,340 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 19:31:07,341 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 19:31:07,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-12-14 19:31:07,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a98dbaa0/cde2f9447c424f68b3fd3bdeafffdae6/FLAGf1bf69135 [2021-12-14 19:31:07,796 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 19:31:07,797 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcat-alloca-2.i [2021-12-14 19:31:07,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a98dbaa0/cde2f9447c424f68b3fd3bdeafffdae6/FLAGf1bf69135 [2021-12-14 19:31:07,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a98dbaa0/cde2f9447c424f68b3fd3bdeafffdae6 [2021-12-14 19:31:07,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 19:31:07,824 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 19:31:07,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 19:31:07,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 19:31:07,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 19:31:07,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:31:07" (1/1) ... [2021-12-14 19:31:07,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27e1cc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:07, skipping insertion in model container [2021-12-14 19:31:07,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:31:07" (1/1) ... [2021-12-14 19:31:07,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 19:31:07,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 19:31:08,161 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:31:08,168 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 19:31:08,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 19:31:08,222 INFO L208 MainTranslator]: Completed translation [2021-12-14 19:31:08,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08 WrapperNode [2021-12-14 19:31:08,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 19:31:08,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 19:31:08,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 19:31:08,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 19:31:08,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,256 INFO L137 Inliner]: procedures = 117, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 94 [2021-12-14 19:31:08,256 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 19:31:08,257 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 19:31:08,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 19:31:08,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 19:31:08,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 19:31:08,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 19:31:08,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 19:31:08,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 19:31:08,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (1/1) ... [2021-12-14 19:31:08,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 19:31:08,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:08,316 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) [2021-12-14 19:31:08,337 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 [2021-12-14 19:31:08,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 19:31:08,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 19:31:08,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 19:31:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 19:31:08,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 19:31:08,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 19:31:08,471 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 19:31:08,473 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 19:31:08,649 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 19:31:08,659 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 19:31:08,660 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-14 19:31:08,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:31:08 BoogieIcfgContainer [2021-12-14 19:31:08,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 19:31:08,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 19:31:08,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 19:31:08,669 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 19:31:08,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:31:07" (1/3) ... [2021-12-14 19:31:08,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a493a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:31:08, skipping insertion in model container [2021-12-14 19:31:08,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:31:08" (2/3) ... [2021-12-14 19:31:08,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64a493a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:31:08, skipping insertion in model container [2021-12-14 19:31:08,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:31:08" (3/3) ... [2021-12-14 19:31:08,672 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcat-alloca-2.i [2021-12-14 19:31:08,675 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 19:31:08,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-12-14 19:31:08,717 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 19:31:08,725 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 [2021-12-14 19:31:08,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-12-14 19:31:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 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) [2021-12-14 19:31:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:31:08,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:08,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:08,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031098, now seen corresponding path program 1 times [2021-12-14 19:31:08,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:08,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109524751] [2021-12-14 19:31:08,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:08,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:08,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:08,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:08,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109524751] [2021-12-14 19:31:08,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109524751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:08,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:08,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:31:08,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290367251] [2021-12-14 19:31:08,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:08,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:31:08,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:08,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:31:08,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:31:09,001 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 43 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) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-12-14 19:31:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:09,134 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2021-12-14 19:31:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:31:09,136 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2021-12-14 19:31:09,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:09,143 INFO L225 Difference]: With dead ends: 124 [2021-12-14 19:31:09,143 INFO L226 Difference]: Without dead ends: 118 [2021-12-14 19:31:09,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:09,147 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 212 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:09,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 158 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:09,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-14 19:31:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 45. [2021-12-14 19:31:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.8) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-14 19:31:09,192 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 7 [2021-12-14 19:31:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:09,192 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-14 19:31:09,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2021-12-14 19:31:09,199 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-14 19:31:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-14 19:31:09,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:09,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:09,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 19:31:09,204 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:09,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033020, now seen corresponding path program 1 times [2021-12-14 19:31:09,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:09,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999778859] [2021-12-14 19:31:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:09,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:09,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:09,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999778859] [2021-12-14 19:31:09,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999778859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:09,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:09,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:31:09,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718691512] [2021-12-14 19:31:09,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:09,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:31:09,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:09,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:31:09,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:31:09,246 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:09,292 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-12-14 19:31:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:31:09,292 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 [2021-12-14 19:31:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:09,293 INFO L225 Difference]: With dead ends: 46 [2021-12-14 19:31:09,293 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 19:31:09,294 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 [2021-12-14 19:31:09,295 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:09,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 19:31:09,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-14 19:31:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-14 19:31:09,306 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-14 19:31:09,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:09,307 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-14 19:31:09,307 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) [2021-12-14 19:31:09,307 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-14 19:31:09,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:31:09,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:09,308 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:09,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 19:31:09,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:09,309 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2021-12-14 19:31:09,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:09,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232793978] [2021-12-14 19:31:09,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:09,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:09,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:09,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:09,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232793978] [2021-12-14 19:31:09,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232793978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:09,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:09,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:31:09,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249681424] [2021-12-14 19:31:09,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:09,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:31:09,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:31:09,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:31:09,369 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:09,393 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-14 19:31:09,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:31:09,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-14 19:31:09,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:09,394 INFO L225 Difference]: With dead ends: 76 [2021-12-14 19:31:09,394 INFO L226 Difference]: Without dead ends: 76 [2021-12-14 19:31:09,395 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 [2021-12-14 19:31:09,396 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:09,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-14 19:31:09,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 46. [2021-12-14 19:31:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-14 19:31:09,402 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2021-12-14 19:31:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:09,402 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-14 19:31:09,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-14 19:31:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:31:09,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:09,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:09,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 19:31:09,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:09,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:09,404 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2021-12-14 19:31:09,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:09,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723521281] [2021-12-14 19:31:09,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:09,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:09,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723521281] [2021-12-14 19:31:09,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723521281] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:09,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:09,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:31:09,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707437415] [2021-12-14 19:31:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:09,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:31:09,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:09,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:31:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:31:09,455 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:09,535 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2021-12-14 19:31:09,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:31:09,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-14 19:31:09,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:09,539 INFO L225 Difference]: With dead ends: 82 [2021-12-14 19:31:09,542 INFO L226 Difference]: Without dead ends: 82 [2021-12-14 19:31:09,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:09,544 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 103 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:09,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 157 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-14 19:31:09,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 46. [2021-12-14 19:31:09,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 45 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-12-14 19:31:09,550 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2021-12-14 19:31:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:09,551 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-12-14 19:31:09,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,551 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-12-14 19:31:09,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:31:09,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:09,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:09,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 19:31:09,552 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:09,553 INFO L85 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2021-12-14 19:31:09,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:09,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173902947] [2021-12-14 19:31:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:09,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:09,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173902947] [2021-12-14 19:31:09,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173902947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:09,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:09,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:31:09,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635648996] [2021-12-14 19:31:09,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:09,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:31:09,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:09,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:31:09,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:31:09,596 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:09,625 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2021-12-14 19:31:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:31:09,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-14 19:31:09,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:09,628 INFO L225 Difference]: With dead ends: 44 [2021-12-14 19:31:09,628 INFO L226 Difference]: Without dead ends: 44 [2021-12-14 19:31:09,628 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 [2021-12-14 19:31:09,638 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:09,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-14 19:31:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-12-14 19:31:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-14 19:31:09,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 8 [2021-12-14 19:31:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:09,647 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-14 19:31:09,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-14 19:31:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 19:31:09,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:09,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:09,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 19:31:09,651 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:09,652 INFO L85 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2021-12-14 19:31:09,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:09,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741887040] [2021-12-14 19:31:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:09,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:09,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:09,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741887040] [2021-12-14 19:31:09,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741887040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:09,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:09,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:31:09,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847137422] [2021-12-14 19:31:09,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:09,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:31:09,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:09,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:31:09,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:31:09,720 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:09,774 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-14 19:31:09,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:31:09,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-14 19:31:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:09,775 INFO L225 Difference]: With dead ends: 77 [2021-12-14 19:31:09,776 INFO L226 Difference]: Without dead ends: 77 [2021-12-14 19:31:09,776 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 [2021-12-14 19:31:09,777 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:09,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:09,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-14 19:31:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 46. [2021-12-14 19:31:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 45 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) [2021-12-14 19:31:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-14 19:31:09,781 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 8 [2021-12-14 19:31:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:09,782 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-14 19:31:09,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-14 19:31:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:31:09,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:09,783 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:09,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 19:31:09,783 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:09,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:09,784 INFO L85 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2021-12-14 19:31:09,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:09,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959140515] [2021-12-14 19:31:09,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:09,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:09,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:09,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959140515] [2021-12-14 19:31:09,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959140515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:09,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:09,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:31:09,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279365978] [2021-12-14 19:31:09,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:09,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:31:09,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:09,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:31:09,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:31:09,841 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:09,858 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-12-14 19:31:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:31:09,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 19:31:09,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:09,860 INFO L225 Difference]: With dead ends: 52 [2021-12-14 19:31:09,860 INFO L226 Difference]: Without dead ends: 52 [2021-12-14 19:31:09,861 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 [2021-12-14 19:31:09,862 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 47 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:09,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-14 19:31:09,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-12-14 19:31:09,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-14 19:31:09,873 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 10 [2021-12-14 19:31:09,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:09,873 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-14 19:31:09,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,873 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-14 19:31:09,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:31:09,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:09,874 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:09,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 19:31:09,874 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:09,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:09,878 INFO L85 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2021-12-14 19:31:09,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:09,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675196763] [2021-12-14 19:31:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:09,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:09,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:09,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675196763] [2021-12-14 19:31:09,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675196763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:09,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:09,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 19:31:09,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436530810] [2021-12-14 19:31:09,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:09,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 19:31:09,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:09,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 19:31:09,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 19:31:09,930 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:09,947 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-12-14 19:31:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 19:31:09,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 19:31:09,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:09,948 INFO L225 Difference]: With dead ends: 45 [2021-12-14 19:31:09,948 INFO L226 Difference]: Without dead ends: 45 [2021-12-14 19:31:09,948 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 [2021-12-14 19:31:09,949 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:09,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:09,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-14 19:31:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-14 19:31:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 34 states have (on average 1.588235294117647) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-14 19:31:09,957 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 10 [2021-12-14 19:31:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:09,957 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-14 19:31:09,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-14 19:31:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 19:31:09,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:09,962 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:09,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 19:31:09,962 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:09,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:09,965 INFO L85 PathProgramCache]: Analyzing trace with hash 690580064, now seen corresponding path program 1 times [2021-12-14 19:31:09,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:09,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62228257] [2021-12-14 19:31:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:09,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:10,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:10,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62228257] [2021-12-14 19:31:10,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62228257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:10,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:10,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:31:10,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157638941] [2021-12-14 19:31:10,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:10,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:31:10,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:31:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:31:10,056 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:10,117 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2021-12-14 19:31:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:31:10,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 19:31:10,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:10,119 INFO L225 Difference]: With dead ends: 48 [2021-12-14 19:31:10,119 INFO L226 Difference]: Without dead ends: 48 [2021-12-14 19:31:10,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:10,121 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:10,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-14 19:31:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-12-14 19:31:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 45 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) [2021-12-14 19:31:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-12-14 19:31:10,137 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2021-12-14 19:31:10,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:10,137 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-12-14 19:31:10,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:10,138 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-12-14 19:31:10,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 19:31:10,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:10,138 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:10,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 19:31:10,139 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:10,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:10,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2021-12-14 19:31:10,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:10,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526750688] [2021-12-14 19:31:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:10,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:10,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:10,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526750688] [2021-12-14 19:31:10,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526750688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:10,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419858530] [2021-12-14 19:31:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:10,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:10,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:10,243 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) [2021-12-14 19:31:10,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 19:31:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 19:31:10,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:10,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:10,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:31:10,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:31:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:10,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:10,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419858530] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:10,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:10,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-14 19:31:10,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168904828] [2021-12-14 19:31:10,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:10,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:31:10,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:31:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:31:10,749 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 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) [2021-12-14 19:31:10,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:10,905 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-12-14 19:31:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:31:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 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 12 [2021-12-14 19:31:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:10,906 INFO L225 Difference]: With dead ends: 106 [2021-12-14 19:31:10,907 INFO L226 Difference]: Without dead ends: 106 [2021-12-14 19:31:10,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-14 19:31:10,908 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 185 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:10,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 168 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-14 19:31:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 43. [2021-12-14 19:31:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2021-12-14 19:31:10,916 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 12 [2021-12-14 19:31:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:10,917 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-12-14 19:31:10,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 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) [2021-12-14 19:31:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2021-12-14 19:31:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:31:10,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:10,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:10,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 19:31:11,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 19:31:11,124 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:11,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382830, now seen corresponding path program 1 times [2021-12-14 19:31:11,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:11,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573977797] [2021-12-14 19:31:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:11,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:11,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:11,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573977797] [2021-12-14 19:31:11,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573977797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:11,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:11,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:31:11,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98943629] [2021-12-14 19:31:11,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:11,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:31:11,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:31:11,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:31:11,186 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2021-12-14 19:31:11,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:11,205 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2021-12-14 19:31:11,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:31:11,206 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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 [2021-12-14 19:31:11,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:11,208 INFO L225 Difference]: With dead ends: 42 [2021-12-14 19:31:11,208 INFO L226 Difference]: Without dead ends: 42 [2021-12-14 19:31:11,208 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 [2021-12-14 19:31:11,209 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:11,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 31 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-14 19:31:11,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-14 19:31:11,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-12-14 19:31:11,211 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 14 [2021-12-14 19:31:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:11,211 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-12-14 19:31:11,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2021-12-14 19:31:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-12-14 19:31:11,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:31:11,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:11,212 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:11,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 19:31:11,212 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1202382883, now seen corresponding path program 1 times [2021-12-14 19:31:11,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:11,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753853476] [2021-12-14 19:31:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:11,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:11,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753853476] [2021-12-14 19:31:11,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753853476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183587068] [2021-12-14 19:31:11,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:11,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:11,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:11,267 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) [2021-12-14 19:31:11,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 19:31:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:11,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 19:31:11,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:11,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:31:11,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183587068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:11,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:31:11,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-12-14 19:31:11,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309290598] [2021-12-14 19:31:11,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:11,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:31:11,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:11,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:31:11,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:11,369 INFO L87 Difference]: Start difference. First operand 42 states and 50 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) [2021-12-14 19:31:11,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:11,385 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2021-12-14 19:31:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:31:11,385 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 [2021-12-14 19:31:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:11,386 INFO L225 Difference]: With dead ends: 71 [2021-12-14 19:31:11,386 INFO L226 Difference]: Without dead ends: 71 [2021-12-14 19:31:11,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:11,387 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 49 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:11,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 106 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:11,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-14 19:31:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2021-12-14 19:31:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-12-14 19:31:11,395 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2021-12-14 19:31:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:11,396 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-12-14 19:31:11,396 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) [2021-12-14 19:31:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-12-14 19:31:11,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-14 19:31:11,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:11,397 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:11,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:11,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-14 19:31:11,620 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1903447461, now seen corresponding path program 1 times [2021-12-14 19:31:11,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:11,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682118313] [2021-12-14 19:31:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:11,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:11,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:11,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682118313] [2021-12-14 19:31:11,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682118313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:11,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850049229] [2021-12-14 19:31:11,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:11,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:11,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:11,691 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) [2021-12-14 19:31:11,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 19:31:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 19:31:11,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:11,766 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:11,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:11,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:11,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850049229] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:11,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:11,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-14 19:31:11,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100861095] [2021-12-14 19:31:11,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:11,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:31:11,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:31:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:31:11,993 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:12,092 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-14 19:31:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:31:12,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 [2021-12-14 19:31:12,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:12,093 INFO L225 Difference]: With dead ends: 73 [2021-12-14 19:31:12,093 INFO L226 Difference]: Without dead ends: 73 [2021-12-14 19:31:12,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:31:12,094 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 116 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:12,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 123 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-14 19:31:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2021-12-14 19:31:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 48 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) [2021-12-14 19:31:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-12-14 19:31:12,096 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 14 [2021-12-14 19:31:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:12,097 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-12-14 19:31:12,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,097 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-12-14 19:31:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 19:31:12,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:12,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:12,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:12,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:12,320 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1380837930, now seen corresponding path program 1 times [2021-12-14 19:31:12,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:12,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719065156] [2021-12-14 19:31:12,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:12,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:12,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:12,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:12,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719065156] [2021-12-14 19:31:12,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719065156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:12,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:12,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:31:12,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625557469] [2021-12-14 19:31:12,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:12,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:31:12,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:12,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:31:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:31:12,384 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:12,430 INFO L93 Difference]: Finished difference Result 89 states and 101 transitions. [2021-12-14 19:31:12,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:31:12,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-14 19:31:12,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:12,431 INFO L225 Difference]: With dead ends: 89 [2021-12-14 19:31:12,431 INFO L226 Difference]: Without dead ends: 89 [2021-12-14 19:31:12,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:31:12,432 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 122 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:12,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 81 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-14 19:31:12,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 72. [2021-12-14 19:31:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 71 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) [2021-12-14 19:31:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2021-12-14 19:31:12,435 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 83 transitions. Word has length 15 [2021-12-14 19:31:12,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:12,435 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 83 transitions. [2021-12-14 19:31:12,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,435 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 83 transitions. [2021-12-14 19:31:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-14 19:31:12,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:12,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:12,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 19:31:12,436 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:12,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:12,437 INFO L85 PathProgramCache]: Analyzing trace with hash -679773352, now seen corresponding path program 1 times [2021-12-14 19:31:12,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:12,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846461987] [2021-12-14 19:31:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:12,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:12,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:12,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846461987] [2021-12-14 19:31:12,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846461987] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:12,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148008511] [2021-12-14 19:31:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:12,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:12,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:12,534 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) [2021-12-14 19:31:12,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 19:31:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:12,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-14 19:31:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:12,636 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:12,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:12,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:31:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148008511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:12,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:31:12,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-12-14 19:31:12,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702348637] [2021-12-14 19:31:12,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:12,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:31:12,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:12,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:31:12,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:31:12,702 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:12,718 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2021-12-14 19:31:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:31:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-14 19:31:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:12,719 INFO L225 Difference]: With dead ends: 71 [2021-12-14 19:31:12,719 INFO L226 Difference]: Without dead ends: 71 [2021-12-14 19:31:12,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:31:12,721 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:12,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:12,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-14 19:31:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-12-14 19:31:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-14 19:31:12,723 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 15 [2021-12-14 19:31:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:12,724 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-14 19:31:12,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-14 19:31:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:31:12,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:12,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:12,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:12,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-14 19:31:12,939 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:12,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:12,940 INFO L85 PathProgramCache]: Analyzing trace with hash 159643962, now seen corresponding path program 1 times [2021-12-14 19:31:12,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:12,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023033957] [2021-12-14 19:31:12,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:12,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:12,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023033957] [2021-12-14 19:31:12,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023033957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:12,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:12,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 19:31:12,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885991826] [2021-12-14 19:31:12,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:12,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 19:31:12,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 19:31:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 19:31:12,964 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:12,994 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-12-14 19:31:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:31:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2021-12-14 19:31:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:12,995 INFO L225 Difference]: With dead ends: 47 [2021-12-14 19:31:12,995 INFO L226 Difference]: Without dead ends: 47 [2021-12-14 19:31:12,995 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 [2021-12-14 19:31:12,996 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:12,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-14 19:31:12,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-14 19:31:12,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 46 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-12-14 19:31:12,998 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 17 [2021-12-14 19:31:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:12,998 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-12-14 19:31:12,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:12,999 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-12-14 19:31:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-14 19:31:13,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:13,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:13,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 19:31:13,002 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash 159643963, now seen corresponding path program 1 times [2021-12-14 19:31:13,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:13,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041055550] [2021-12-14 19:31:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:13,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:13,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:13,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041055550] [2021-12-14 19:31:13,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041055550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:13,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:13,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:31:13,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549217980] [2021-12-14 19:31:13,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:13,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:31:13,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:13,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:31:13,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:31:13,064 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:13,095 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2021-12-14 19:31:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:31:13,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 [2021-12-14 19:31:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:13,096 INFO L225 Difference]: With dead ends: 50 [2021-12-14 19:31:13,096 INFO L226 Difference]: Without dead ends: 50 [2021-12-14 19:31:13,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:13,097 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 91 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:13,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:13,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-14 19:31:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-14 19:31:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-14 19:31:13,100 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 17 [2021-12-14 19:31:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:13,100 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-14 19:31:13,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-14 19:31:13,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:31:13,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:13,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:13,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 19:31:13,101 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:13,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1200973612, now seen corresponding path program 1 times [2021-12-14 19:31:13,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270151759] [2021-12-14 19:31:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:13,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:13,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:13,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270151759] [2021-12-14 19:31:13,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270151759] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:13,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108065160] [2021-12-14 19:31:13,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:13,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:13,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:13,169 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) [2021-12-14 19:31:13,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 19:31:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:13,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 19:31:13,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:13,296 INFO L388 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 [2021-12-14 19:31:13,325 INFO L388 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 [2021-12-14 19:31:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:13,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 19:31:13,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108065160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:13,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 19:31:13,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2021-12-14 19:31:13,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660172880] [2021-12-14 19:31:13,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:13,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:31:13,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:13,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:31:13,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-14 19:31:13,338 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:13,407 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-12-14 19:31:13,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:31:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-14 19:31:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:13,409 INFO L225 Difference]: With dead ends: 93 [2021-12-14 19:31:13,409 INFO L226 Difference]: Without dead ends: 93 [2021-12-14 19:31:13,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-12-14 19:31:13,410 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:13,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 186 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-14 19:31:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2021-12-14 19:31:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.25) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:13,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2021-12-14 19:31:13,412 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 19 [2021-12-14 19:31:13,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:13,413 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2021-12-14 19:31:13,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2021-12-14 19:31:13,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 19:31:13,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:13,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:13,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:13,636 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,SelfDestructingSolverStorable17 [2021-12-14 19:31:13,636 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:13,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1814130006, now seen corresponding path program 1 times [2021-12-14 19:31:13,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:13,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452487737] [2021-12-14 19:31:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:13,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:13,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:13,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452487737] [2021-12-14 19:31:13,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452487737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:13,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579276647] [2021-12-14 19:31:13,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:13,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:13,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:13,690 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) [2021-12-14 19:31:13,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 19:31:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-14 19:31:13,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:13,773 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:13,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:13,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:13,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:13,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579276647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:13,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:13,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2021-12-14 19:31:13,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64201691] [2021-12-14 19:31:13,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:13,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:31:13,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:13,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:31:13,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:31:13,961 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:14,039 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-12-14 19:31:14,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 19:31:14,039 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-14 19:31:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:14,040 INFO L225 Difference]: With dead ends: 91 [2021-12-14 19:31:14,040 INFO L226 Difference]: Without dead ends: 91 [2021-12-14 19:31:14,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:31:14,041 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 136 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:14,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 110 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-14 19:31:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-12-14 19:31:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-12-14 19:31:14,044 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 19 [2021-12-14 19:31:14,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:14,044 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-12-14 19:31:14,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,044 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-12-14 19:31:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:31:14,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:14,045 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:14,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:14,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:14,261 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522230, now seen corresponding path program 1 times [2021-12-14 19:31:14,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:14,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530520247] [2021-12-14 19:31:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:14,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:14,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:14,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530520247] [2021-12-14 19:31:14,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530520247] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:14,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:14,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:31:14,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159668799] [2021-12-14 19:31:14,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:14,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:31:14,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:14,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:31:14,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:31:14,291 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 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) [2021-12-14 19:31:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:14,324 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-12-14 19:31:14,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:31:14,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 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 20 [2021-12-14 19:31:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:14,328 INFO L225 Difference]: With dead ends: 75 [2021-12-14 19:31:14,328 INFO L226 Difference]: Without dead ends: 75 [2021-12-14 19:31:14,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:14,329 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:14,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 66 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-14 19:31:14,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-14 19:31:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 74 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-12-14 19:31:14,335 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 20 [2021-12-14 19:31:14,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:14,335 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-12-14 19:31:14,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 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) [2021-12-14 19:31:14,336 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-12-14 19:31:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-14 19:31:14,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:14,338 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:14,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 19:31:14,338 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:14,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:14,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1424522231, now seen corresponding path program 1 times [2021-12-14 19:31:14,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:14,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166973974] [2021-12-14 19:31:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:14,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:14,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:14,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166973974] [2021-12-14 19:31:14,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166973974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:14,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:14,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 19:31:14,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038369855] [2021-12-14 19:31:14,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:14,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 19:31:14,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:14,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 19:31:14,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:14,413 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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) [2021-12-14 19:31:14,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:14,474 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-12-14 19:31:14,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:31:14,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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 20 [2021-12-14 19:31:14,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:14,475 INFO L225 Difference]: With dead ends: 81 [2021-12-14 19:31:14,475 INFO L226 Difference]: Without dead ends: 81 [2021-12-14 19:31:14,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:31:14,476 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:14,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 78 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-14 19:31:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2021-12-14 19:31:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 76 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) [2021-12-14 19:31:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-12-14 19:31:14,478 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 20 [2021-12-14 19:31:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:14,478 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-12-14 19:31:14,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 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) [2021-12-14 19:31:14,479 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-12-14 19:31:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:31:14,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:14,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:14,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 19:31:14,479 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516230, now seen corresponding path program 1 times [2021-12-14 19:31:14,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:14,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536912266] [2021-12-14 19:31:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:14,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:14,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:14,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536912266] [2021-12-14 19:31:14,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536912266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:14,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:14,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:31:14,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006901335] [2021-12-14 19:31:14,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:14,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:31:14,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:31:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:31:14,507 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:14,542 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-14 19:31:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 19:31:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-14 19:31:14,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:14,543 INFO L225 Difference]: With dead ends: 76 [2021-12-14 19:31:14,543 INFO L226 Difference]: Without dead ends: 76 [2021-12-14 19:31:14,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 19:31:14,544 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:14,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-14 19:31:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-12-14 19:31:14,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 75 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2021-12-14 19:31:14,546 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 21 [2021-12-14 19:31:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:14,546 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2021-12-14 19:31:14,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,547 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2021-12-14 19:31:14,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:31:14,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:14,547 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:14,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-14 19:31:14,547 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:14,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1210516231, now seen corresponding path program 1 times [2021-12-14 19:31:14,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:14,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570364165] [2021-12-14 19:31:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:14,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:14,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:14,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570364165] [2021-12-14 19:31:14,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570364165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:14,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:14,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 19:31:14,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809741515] [2021-12-14 19:31:14,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:14,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 19:31:14,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 19:31:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 19:31:14,593 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:14,653 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-14 19:31:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 19:31:14,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-14 19:31:14,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:14,654 INFO L225 Difference]: With dead ends: 80 [2021-12-14 19:31:14,654 INFO L226 Difference]: Without dead ends: 80 [2021-12-14 19:31:14,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:31:14,655 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:14,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 71 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-14 19:31:14,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-12-14 19:31:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.2133333333333334) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2021-12-14 19:31:14,657 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 21 [2021-12-14 19:31:14,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:14,657 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2021-12-14 19:31:14,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,658 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2021-12-14 19:31:14,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:31:14,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:14,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:14,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-14 19:31:14,658 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:14,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:14,659 INFO L85 PathProgramCache]: Analyzing trace with hash -377785809, now seen corresponding path program 2 times [2021-12-14 19:31:14,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:14,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445211679] [2021-12-14 19:31:14,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:14,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:14,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:31:14,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:14,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445211679] [2021-12-14 19:31:14,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445211679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:14,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:14,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:31:14,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588822063] [2021-12-14 19:31:14,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:14,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:31:14,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:14,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:31:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:31:14,757 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:14,889 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-12-14 19:31:14,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:31:14,889 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-12-14 19:31:14,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:14,890 INFO L225 Difference]: With dead ends: 102 [2021-12-14 19:31:14,890 INFO L226 Difference]: Without dead ends: 102 [2021-12-14 19:31:14,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-14 19:31:14,891 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 120 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:14,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 148 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-12-14 19:31:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2021-12-14 19:31:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 70 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) [2021-12-14 19:31:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2021-12-14 19:31:14,893 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 21 [2021-12-14 19:31:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:14,894 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2021-12-14 19:31:14,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:14,894 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2021-12-14 19:31:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 19:31:14,895 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:14,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:14,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-14 19:31:14,895 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:14,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1923036781, now seen corresponding path program 1 times [2021-12-14 19:31:14,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:14,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645964472] [2021-12-14 19:31:14,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:14,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:15,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645964472] [2021-12-14 19:31:15,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645964472] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489599766] [2021-12-14 19:31:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:15,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:15,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:15,054 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) [2021-12-14 19:31:15,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 19:31:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:15,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 19:31:15,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:15,267 INFO L388 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 [2021-12-14 19:31:15,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:15,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:31:15,363 INFO L388 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 10 [2021-12-14 19:31:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:15,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:15,429 INFO L388 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 [2021-12-14 19:31:15,433 INFO L388 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 [2021-12-14 19:31:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:15,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489599766] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:15,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:15,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2021-12-14 19:31:15,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31495328] [2021-12-14 19:31:15,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:15,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 19:31:15,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 19:31:15,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:31:15,684 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:15,988 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2021-12-14 19:31:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 19:31:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 19:31:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:15,989 INFO L225 Difference]: With dead ends: 95 [2021-12-14 19:31:15,989 INFO L226 Difference]: Without dead ends: 95 [2021-12-14 19:31:15,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2021-12-14 19:31:15,990 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 131 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:15,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 250 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 140 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2021-12-14 19:31:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-14 19:31:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2021-12-14 19:31:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 74 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2021-12-14 19:31:15,992 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 21 [2021-12-14 19:31:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:15,992 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2021-12-14 19:31:15,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2021-12-14 19:31:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:31:15,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:15,993 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:16,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:16,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:16,193 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:16,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1943656895, now seen corresponding path program 1 times [2021-12-14 19:31:16,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:16,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500630772] [2021-12-14 19:31:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:16,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:16,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:16,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:16,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500630772] [2021-12-14 19:31:16,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500630772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:16,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:16,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 19:31:16,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172414645] [2021-12-14 19:31:16,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:16,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:31:16,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:31:16,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:31:16,339 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 10 states, 10 states have (on average 2.4) 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) [2021-12-14 19:31:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:16,621 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2021-12-14 19:31:16,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:31:16,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) 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 24 [2021-12-14 19:31:16,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:16,622 INFO L225 Difference]: With dead ends: 136 [2021-12-14 19:31:16,622 INFO L226 Difference]: Without dead ends: 136 [2021-12-14 19:31:16,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:31:16,623 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:16,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 216 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:16,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-14 19:31:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 114. [2021-12-14 19:31:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 110 states have (on average 1.2) internal successors, (132), 113 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2021-12-14 19:31:16,625 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 24 [2021-12-14 19:31:16,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:16,626 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2021-12-14 19:31:16,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) 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) [2021-12-14 19:31:16,626 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2021-12-14 19:31:16,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:31:16,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:16,627 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:16,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-14 19:31:16,627 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:16,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2132455683, now seen corresponding path program 1 times [2021-12-14 19:31:16,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:16,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527127014] [2021-12-14 19:31:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:16,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:16,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:16,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527127014] [2021-12-14 19:31:16,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527127014] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:16,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:16,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 19:31:16,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973773042] [2021-12-14 19:31:16,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:16,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 19:31:16,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 19:31:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-14 19:31:16,749 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 10 states, 10 states have (on average 2.4) 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) [2021-12-14 19:31:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:16,941 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2021-12-14 19:31:16,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:31:16,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) 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 24 [2021-12-14 19:31:16,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:16,943 INFO L225 Difference]: With dead ends: 136 [2021-12-14 19:31:16,943 INFO L226 Difference]: Without dead ends: 136 [2021-12-14 19:31:16,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-12-14 19:31:16,944 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:16,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 186 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-14 19:31:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2021-12-14 19:31:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 101 states have (on average 1.2079207920792079) internal successors, (122), 104 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-12-14 19:31:16,946 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 24 [2021-12-14 19:31:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:16,947 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-12-14 19:31:16,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) 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) [2021-12-14 19:31:16,947 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-12-14 19:31:16,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 19:31:16,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:16,947 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:16,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-14 19:31:16,948 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1709753857, now seen corresponding path program 1 times [2021-12-14 19:31:16,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547653283] [2021-12-14 19:31:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:16,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:17,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547653283] [2021-12-14 19:31:17,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547653283] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:17,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:17,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 19:31:17,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065624844] [2021-12-14 19:31:17,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:17,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 19:31:17,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 19:31:17,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-14 19:31:17,059 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2021-12-14 19:31:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:17,151 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2021-12-14 19:31:17,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 19:31:17,151 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 24 [2021-12-14 19:31:17,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:17,152 INFO L225 Difference]: With dead ends: 155 [2021-12-14 19:31:17,152 INFO L226 Difference]: Without dead ends: 155 [2021-12-14 19:31:17,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:31:17,153 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 78 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:17,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 140 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-14 19:31:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2021-12-14 19:31:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.238532110091743) internal successors, (135), 112 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-12-14 19:31:17,155 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 24 [2021-12-14 19:31:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:17,155 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-12-14 19:31:17,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2021-12-14 19:31:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-12-14 19:31:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 19:31:17,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:17,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:17,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-14 19:31:17,156 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:17,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash 123776973, now seen corresponding path program 1 times [2021-12-14 19:31:17,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:17,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437142026] [2021-12-14 19:31:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:17,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:17,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:17,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437142026] [2021-12-14 19:31:17,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437142026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 19:31:17,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 19:31:17,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 19:31:17,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520631686] [2021-12-14 19:31:17,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 19:31:17,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 19:31:17,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:17,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 19:31:17,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:31:17,238 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:17,253 INFO L93 Difference]: Finished difference Result 112 states and 134 transitions. [2021-12-14 19:31:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 19:31:17,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-12-14 19:31:17,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:17,254 INFO L225 Difference]: With dead ends: 112 [2021-12-14 19:31:17,255 INFO L226 Difference]: Without dead ends: 83 [2021-12-14 19:31:17,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 19:31:17,255 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 38 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:17,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 19:31:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-12-14 19:31:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-12-14 19:31:17,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.2) internal successors, (96), 82 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) [2021-12-14 19:31:17,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-12-14 19:31:17,258 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 25 [2021-12-14 19:31:17,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:17,258 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-12-14 19:31:17,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-12-14 19:31:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 19:31:17,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:17,259 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:17,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-14 19:31:17,259 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2136240330, now seen corresponding path program 2 times [2021-12-14 19:31:17,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:17,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697826500] [2021-12-14 19:31:17,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:17,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:17,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:17,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697826500] [2021-12-14 19:31:17,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697826500] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:17,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347029665] [2021-12-14 19:31:17,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:31:17,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:17,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:17,360 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) [2021-12-14 19:31:17,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 19:31:17,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:31:17,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:17,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 19:31:17,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:17,456 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:17,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:17,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:17,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347029665] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:17,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:17,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-14 19:31:17,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842573607] [2021-12-14 19:31:17,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:17,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 19:31:17,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:17,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 19:31:17,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-12-14 19:31:17,850 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:18,068 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2021-12-14 19:31:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:31:18,069 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 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 25 [2021-12-14 19:31:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:18,069 INFO L225 Difference]: With dead ends: 122 [2021-12-14 19:31:18,069 INFO L226 Difference]: Without dead ends: 122 [2021-12-14 19:31:18,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-12-14 19:31:18,070 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 152 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:18,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 188 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-14 19:31:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2021-12-14 19:31:18,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.2142857142857142) internal successors, (102), 86 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2021-12-14 19:31:18,072 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 25 [2021-12-14 19:31:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:18,072 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2021-12-14 19:31:18,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2021-12-14 19:31:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 19:31:18,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:18,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:18,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:18,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:18,284 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:18,284 INFO L85 PathProgramCache]: Analyzing trace with hash -67455619, now seen corresponding path program 1 times [2021-12-14 19:31:18,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:18,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601550081] [2021-12-14 19:31:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:18,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:18,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601550081] [2021-12-14 19:31:18,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601550081] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:18,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000953306] [2021-12-14 19:31:18,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:18,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:18,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:18,400 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) [2021-12-14 19:31:18,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 19:31:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:18,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-14 19:31:18,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:18,501 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:18,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:18,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:18,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000953306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:18,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:18,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-12-14 19:31:18,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532663806] [2021-12-14 19:31:18,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:18,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-14 19:31:18,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-14 19:31:18,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-12-14 19:31:18,961 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:19,421 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2021-12-14 19:31:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 19:31:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2021-12-14 19:31:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:19,422 INFO L225 Difference]: With dead ends: 125 [2021-12-14 19:31:19,422 INFO L226 Difference]: Without dead ends: 119 [2021-12-14 19:31:19,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=1013, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:31:19,424 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 254 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:19,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 111 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-14 19:31:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-12-14 19:31:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 100 states have (on average 1.19) internal successors, (119), 102 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2021-12-14 19:31:19,426 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 27 [2021-12-14 19:31:19,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:19,426 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2021-12-14 19:31:19,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 24 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2021-12-14 19:31:19,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-14 19:31:19,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:19,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:19,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:19,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:19,639 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:19,640 INFO L85 PathProgramCache]: Analyzing trace with hash -67409757, now seen corresponding path program 3 times [2021-12-14 19:31:19,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:19,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663585591] [2021-12-14 19:31:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:19,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:19,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:19,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663585591] [2021-12-14 19:31:19,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663585591] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:19,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372267773] [2021-12-14 19:31:19,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:31:19,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:19,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:19,931 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) [2021-12-14 19:31:19,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-14 19:31:20,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 19:31:20,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:20,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-14 19:31:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:20,222 INFO L388 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 [2021-12-14 19:31:20,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:20,435 INFO L354 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2021-12-14 19:31:20,438 INFO L388 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 20 [2021-12-14 19:31:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:20,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:20,596 INFO L388 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 [2021-12-14 19:31:20,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:20,599 INFO L388 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 [2021-12-14 19:31:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:20,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372267773] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:20,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:20,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 34 [2021-12-14 19:31:20,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972990649] [2021-12-14 19:31:20,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:20,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-14 19:31:20,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:20,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-14 19:31:20,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-12-14 19:31:20,956 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:21,511 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2021-12-14 19:31:21,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:31:21,511 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 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 [2021-12-14 19:31:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:21,512 INFO L225 Difference]: With dead ends: 143 [2021-12-14 19:31:21,512 INFO L226 Difference]: Without dead ends: 136 [2021-12-14 19:31:21,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=443, Invalid=1719, Unknown=0, NotChecked=0, Total=2162 [2021-12-14 19:31:21,513 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 142 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:21,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 156 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 159 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-12-14 19:31:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-14 19:31:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 116. [2021-12-14 19:31:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 115 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:21,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-12-14 19:31:21,518 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 27 [2021-12-14 19:31:21,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:21,518 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-12-14 19:31:21,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:21,518 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-12-14 19:31:21,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-14 19:31:21,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:21,519 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:21,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:21,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-14 19:31:21,729 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:21,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash -438004926, now seen corresponding path program 1 times [2021-12-14 19:31:21,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:21,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274878096] [2021-12-14 19:31:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:21,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:31:21,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:21,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274878096] [2021-12-14 19:31:21,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274878096] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:21,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701936233] [2021-12-14 19:31:21,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:21,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:21,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:21,790 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) [2021-12-14 19:31:21,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-14 19:31:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-14 19:31:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:31:21,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 19:31:22,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701936233] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:22,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:22,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-12-14 19:31:22,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116521494] [2021-12-14 19:31:22,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:22,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 19:31:22,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:22,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 19:31:22,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-14 19:31:22,023 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:22,139 INFO L93 Difference]: Finished difference Result 123 states and 138 transitions. [2021-12-14 19:31:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 19:31:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 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 28 [2021-12-14 19:31:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:22,140 INFO L225 Difference]: With dead ends: 123 [2021-12-14 19:31:22,140 INFO L226 Difference]: Without dead ends: 123 [2021-12-14 19:31:22,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-12-14 19:31:22,141 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 163 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:22,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 99 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-14 19:31:22,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 113. [2021-12-14 19:31:22,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 112 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) [2021-12-14 19:31:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-12-14 19:31:22,144 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 28 [2021-12-14 19:31:22,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:22,144 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-12-14 19:31:22,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:22,144 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-12-14 19:31:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-14 19:31:22,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:22,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:22,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-14 19:31:22,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-14 19:31:22,355 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666176, now seen corresponding path program 4 times [2021-12-14 19:31:22,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:22,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569655956] [2021-12-14 19:31:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:22,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:22,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:22,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569655956] [2021-12-14 19:31:22,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569655956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:22,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203416283] [2021-12-14 19:31:22,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:31:22,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:22,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:22,471 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) [2021-12-14 19:31:22,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-14 19:31:22,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:31:22,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:22,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-14 19:31:22,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:22,599 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:22,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:22,743 INFO L388 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 [2021-12-14 19:31:22,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:22,981 INFO L354 Elim1Store]: treesize reduction 6, result has 76.0 percent of original size [2021-12-14 19:31:22,981 INFO L388 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 2 case distinctions, treesize of input 28 treesize of output 29 [2021-12-14 19:31:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:31:23,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:23,370 INFO L388 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 [2021-12-14 19:31:23,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:23,373 INFO L388 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 [2021-12-14 19:31:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:31:23,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203416283] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:23,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:23,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2021-12-14 19:31:23,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772150422] [2021-12-14 19:31:23,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:23,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-14 19:31:23,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:23,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-14 19:31:23,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-12-14 19:31:23,782 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:24,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:24,525 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-12-14 19:31:24,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 19:31:24,525 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 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 [2021-12-14 19:31:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:24,526 INFO L225 Difference]: With dead ends: 153 [2021-12-14 19:31:24,526 INFO L226 Difference]: Without dead ends: 153 [2021-12-14 19:31:24,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=1874, Unknown=0, NotChecked=0, Total=2162 [2021-12-14 19:31:24,527 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:24,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 315 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 590 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2021-12-14 19:31:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-14 19:31:24,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 121. [2021-12-14 19:31:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 118 states have (on average 1.1779661016949152) internal successors, (139), 120 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 139 transitions. [2021-12-14 19:31:24,529 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 139 transitions. Word has length 31 [2021-12-14 19:31:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:24,530 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 139 transitions. [2021-12-14 19:31:24,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 139 transitions. [2021-12-14 19:31:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-14 19:31:24,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:24,530 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:24,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:24,735 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,SelfDestructingSolverStorable33 [2021-12-14 19:31:24,735 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:24,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:24,736 INFO L85 PathProgramCache]: Analyzing trace with hash -992295355, now seen corresponding path program 2 times [2021-12-14 19:31:24,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:24,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404053898] [2021-12-14 19:31:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:24,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 19:31:24,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:24,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404053898] [2021-12-14 19:31:24,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404053898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:24,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658695667] [2021-12-14 19:31:24,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:31:24,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:24,868 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) [2021-12-14 19:31:24,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-14 19:31:24,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:31:24,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:24,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 19:31:24,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 19:31:25,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:25,157 INFO L388 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 [2021-12-14 19:31:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 19:31:25,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658695667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:25,197 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:25,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-14 19:31:25,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779356525] [2021-12-14 19:31:25,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:25,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 19:31:25,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:25,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 19:31:25,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-12-14 19:31:25,199 INFO L87 Difference]: Start difference. First operand 121 states and 139 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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) [2021-12-14 19:31:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:25,418 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2021-12-14 19:31:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 19:31:25,419 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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 32 [2021-12-14 19:31:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:25,419 INFO L225 Difference]: With dead ends: 140 [2021-12-14 19:31:25,419 INFO L226 Difference]: Without dead ends: 140 [2021-12-14 19:31:25,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-12-14 19:31:25,420 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:25,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 244 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-12-14 19:31:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 129. [2021-12-14 19:31:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 128 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2021-12-14 19:31:25,423 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 32 [2021-12-14 19:31:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:25,423 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2021-12-14 19:31:25,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 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) [2021-12-14 19:31:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2021-12-14 19:31:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-14 19:31:25,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:25,424 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:25,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:25,627 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,SelfDestructingSolverStorable34 [2021-12-14 19:31:25,627 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:25,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1626154062, now seen corresponding path program 5 times [2021-12-14 19:31:25,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:25,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580676633] [2021-12-14 19:31:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:25,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:25,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:25,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580676633] [2021-12-14 19:31:25,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580676633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:25,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277110553] [2021-12-14 19:31:25,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 19:31:25,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:25,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:25,766 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) [2021-12-14 19:31:25,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-14 19:31:25,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-14 19:31:25,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-14 19:31:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:25,878 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:25,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:26,189 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:26,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:26,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277110553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:26,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:26,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2021-12-14 19:31:26,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059734580] [2021-12-14 19:31:26,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:26,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 19:31:26,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:26,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 19:31:26,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:31:26,405 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:26,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:26,930 INFO L93 Difference]: Finished difference Result 251 states and 274 transitions. [2021-12-14 19:31:26,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 19:31:26,930 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-14 19:31:26,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:26,931 INFO L225 Difference]: With dead ends: 251 [2021-12-14 19:31:26,931 INFO L226 Difference]: Without dead ends: 238 [2021-12-14 19:31:26,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=540, Invalid=1812, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 19:31:26,932 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 301 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:26,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 242 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 19:31:26,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-14 19:31:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 148. [2021-12-14 19:31:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 145 states have (on average 1.1655172413793105) internal successors, (169), 147 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:26,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 169 transitions. [2021-12-14 19:31:26,942 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 169 transitions. Word has length 35 [2021-12-14 19:31:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:26,942 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 169 transitions. [2021-12-14 19:31:26,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 33 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:26,943 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 169 transitions. [2021-12-14 19:31:26,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-14 19:31:26,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:26,945 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:26,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:27,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:27,163 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:27,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1310569203, now seen corresponding path program 3 times [2021-12-14 19:31:27,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:27,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746661304] [2021-12-14 19:31:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:27,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 19:31:27,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:27,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746661304] [2021-12-14 19:31:27,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746661304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:27,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16838301] [2021-12-14 19:31:27,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:31:27,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:27,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:27,390 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) [2021-12-14 19:31:27,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-14 19:31:27,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-14 19:31:27,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:27,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-14 19:31:27,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:27,773 INFO L388 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 [2021-12-14 19:31:27,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:27,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-14 19:31:28,019 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-14 19:31:28,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 42 [2021-12-14 19:31:28,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:28,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:28,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2021-12-14 19:31:28,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:28,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:28,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:31:28,187 INFO L388 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 25 treesize of output 14 [2021-12-14 19:31:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:28,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:28,259 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_579) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) (= 0 |c_ULTIMATE.start_cstrcat_#t~mem6#1|)) is different from false [2021-12-14 19:31:28,270 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post4#1.base| v_ArrVal_579) |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_#t~post5#1.base|) |c_ULTIMATE.start_cstrcat_#t~post5#1.offset|) 0)) is different from false [2021-12-14 19:31:28,278 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s~0#1.base| v_ArrVal_579) |c_ULTIMATE.start_cstrcat_~s2#1.base|) (+ |c_ULTIMATE.start_cstrcat_~s2#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_cstrcat_~s2#1.base|) |c_ULTIMATE.start_cstrcat_~s2#1.offset|) 0)) is different from false [2021-12-14 19:31:28,310 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_579) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)) is different from false [2021-12-14 19:31:28,318 WARN L838 $PredicateComparison]: unable to prove that (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |c_ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length3~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0) (forall ((v_ArrVal_579 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_579) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0))) is different from false [2021-12-14 19:31:28,335 INFO L354 Elim1Store]: treesize reduction 23, result has 46.5 percent of original size [2021-12-14 19:31:28,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 73 [2021-12-14 19:31:28,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:28,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:28,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:31:28,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2021-12-14 19:31:28,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:31:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-12-14 19:31:28,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16838301] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:28,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:28,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 43 [2021-12-14 19:31:28,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086620332] [2021-12-14 19:31:28,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:28,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-14 19:31:28,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-14 19:31:28,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1253, Unknown=5, NotChecked=380, Total=1806 [2021-12-14 19:31:28,878 INFO L87 Difference]: Start difference. First operand 148 states and 169 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:30,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:30,486 INFO L93 Difference]: Finished difference Result 290 states and 325 transitions. [2021-12-14 19:31:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-14 19:31:30,492 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-14 19:31:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:30,493 INFO L225 Difference]: With dead ends: 290 [2021-12-14 19:31:30,493 INFO L226 Difference]: Without dead ends: 222 [2021-12-14 19:31:30,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 5 IntricatePredicates, 3 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=753, Invalid=5422, Unknown=7, NotChecked=790, Total=6972 [2021-12-14 19:31:30,495 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 344 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:30,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 343 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 457 Invalid, 0 Unknown, 584 Unchecked, 0.3s Time] [2021-12-14 19:31:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-14 19:31:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 210. [2021-12-14 19:31:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 207 states have (on average 1.1497584541062802) internal successors, (238), 209 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 238 transitions. [2021-12-14 19:31:30,498 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 238 transitions. Word has length 36 [2021-12-14 19:31:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:30,499 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 238 transitions. [2021-12-14 19:31:30,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 43 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:30,499 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 238 transitions. [2021-12-14 19:31:30,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 19:31:30,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:30,499 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:30,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:30,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-14 19:31:30,700 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:30,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 634400591, now seen corresponding path program 6 times [2021-12-14 19:31:30,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:30,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244054834] [2021-12-14 19:31:30,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:30,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:31,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244054834] [2021-12-14 19:31:31,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244054834] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:31,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394223761] [2021-12-14 19:31:31,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 19:31:31,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:31,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:31,259 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) [2021-12-14 19:31:31,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-14 19:31:31,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-14 19:31:31,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:31,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-14 19:31:31,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:31,592 INFO L388 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 [2021-12-14 19:31:33,061 INFO L354 Elim1Store]: treesize reduction 101, result has 13.7 percent of original size [2021-12-14 19:31:33,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 34 [2021-12-14 19:31:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 31 refuted. 3 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:33,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:33,229 INFO L388 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 59 treesize of output 51 [2021-12-14 19:31:33,234 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-12-14 19:31:33,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 81 [2021-12-14 19:31:33,565 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:33,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394223761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:33,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:33,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2021-12-14 19:31:33,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458258289] [2021-12-14 19:31:33,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:33,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-14 19:31:33,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:33,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-14 19:31:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1741, Unknown=3, NotChecked=0, Total=1980 [2021-12-14 19:31:33,567 INFO L87 Difference]: Start difference. First operand 210 states and 238 transitions. Second operand has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:38,126 INFO L93 Difference]: Finished difference Result 362 states and 401 transitions. [2021-12-14 19:31:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-14 19:31:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 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 39 [2021-12-14 19:31:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:38,127 INFO L225 Difference]: With dead ends: 362 [2021-12-14 19:31:38,127 INFO L226 Difference]: Without dead ends: 351 [2021-12-14 19:31:38,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1174, Invalid=5137, Unknown=9, NotChecked=0, Total=6320 [2021-12-14 19:31:38,129 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 443 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:38,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 449 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 591 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2021-12-14 19:31:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-12-14 19:31:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 222. [2021-12-14 19:31:38,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 219 states have (on average 1.1506849315068493) internal successors, (252), 221 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2021-12-14 19:31:38,133 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 39 [2021-12-14 19:31:38,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:38,134 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2021-12-14 19:31:38,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.088888888888889) internal successors, (94), 45 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:38,134 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2021-12-14 19:31:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 19:31:38,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:38,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:38,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:38,351 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,SelfDestructingSolverStorable37 [2021-12-14 19:31:38,351 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -2078988342, now seen corresponding path program 1 times [2021-12-14 19:31:38,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:38,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330084452] [2021-12-14 19:31:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:38,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:38,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:38,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330084452] [2021-12-14 19:31:38,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330084452] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:38,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479558228] [2021-12-14 19:31:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:38,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:38,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:38,484 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:31:38,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-14 19:31:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-14 19:31:38,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:38,586 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:38,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:39,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479558228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:39,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:39,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2021-12-14 19:31:39,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844294146] [2021-12-14 19:31:39,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:39,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 19:31:39,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:39,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 19:31:39,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 19:31:39,189 INFO L87 Difference]: Start difference. First operand 222 states and 252 transitions. Second operand has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:39,833 INFO L93 Difference]: Finished difference Result 263 states and 291 transitions. [2021-12-14 19:31:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:31:39,833 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 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 [2021-12-14 19:31:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:39,835 INFO L225 Difference]: With dead ends: 263 [2021-12-14 19:31:39,835 INFO L226 Difference]: Without dead ends: 256 [2021-12-14 19:31:39,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=466, Invalid=1790, Unknown=0, NotChecked=0, Total=2256 [2021-12-14 19:31:39,836 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 206 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:39,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 310 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 19:31:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-14 19:31:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 232. [2021-12-14 19:31:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 231 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 261 transitions. [2021-12-14 19:31:39,842 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 261 transitions. Word has length 41 [2021-12-14 19:31:39,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:39,842 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 261 transitions. [2021-12-14 19:31:39,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.53125) internal successors, (113), 33 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:39,843 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 261 transitions. [2021-12-14 19:31:39,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 19:31:39,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:39,844 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:39,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:40,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-14 19:31:40,053 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:40,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash 541424533, now seen corresponding path program 1 times [2021-12-14 19:31:40,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:40,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267944858] [2021-12-14 19:31:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:40,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:40,113 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:31:40,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267944858] [2021-12-14 19:31:40,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267944858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:40,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283578749] [2021-12-14 19:31:40,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:40,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:40,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:40,115 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:31:40,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-14 19:31:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:40,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 19:31:40,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:40,359 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:31:40,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 19:31:40,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283578749] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:40,468 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:40,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-12-14 19:31:40,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362025040] [2021-12-14 19:31:40,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:40,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 19:31:40,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 19:31:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 19:31:40,470 INFO L87 Difference]: Start difference. First operand 232 states and 261 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 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) [2021-12-14 19:31:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:40,642 INFO L93 Difference]: Finished difference Result 231 states and 256 transitions. [2021-12-14 19:31:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 19:31:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 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) Word has length 42 [2021-12-14 19:31:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:40,644 INFO L225 Difference]: With dead ends: 231 [2021-12-14 19:31:40,644 INFO L226 Difference]: Without dead ends: 231 [2021-12-14 19:31:40,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2021-12-14 19:31:40,645 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 186 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:40,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 184 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 19:31:40,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-14 19:31:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 225. [2021-12-14 19:31:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 224 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 253 transitions. [2021-12-14 19:31:40,648 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 253 transitions. Word has length 42 [2021-12-14 19:31:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:40,648 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 253 transitions. [2021-12-14 19:31:40,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 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) [2021-12-14 19:31:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 253 transitions. [2021-12-14 19:31:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 19:31:40,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:40,649 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:40,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:40,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-14 19:31:40,875 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:40,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1605342100, now seen corresponding path program 7 times [2021-12-14 19:31:40,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:40,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189345301] [2021-12-14 19:31:40,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:40,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:41,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:41,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189345301] [2021-12-14 19:31:41,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189345301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:41,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187293261] [2021-12-14 19:31:41,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 19:31:41,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:41,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:41,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:31:41,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-14 19:31:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:41,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-14 19:31:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:41,195 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:41,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:41,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:41,964 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:41,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187293261] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:41,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:41,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2021-12-14 19:31:41,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447747597] [2021-12-14 19:31:41,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:41,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-14 19:31:41,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-14 19:31:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1547, Unknown=0, NotChecked=0, Total=1806 [2021-12-14 19:31:41,967 INFO L87 Difference]: Start difference. First operand 225 states and 253 transitions. Second operand has 43 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:42,553 INFO L93 Difference]: Finished difference Result 401 states and 440 transitions. [2021-12-14 19:31:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-14 19:31:42,554 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 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 43 [2021-12-14 19:31:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:42,555 INFO L225 Difference]: With dead ends: 401 [2021-12-14 19:31:42,555 INFO L226 Difference]: Without dead ends: 401 [2021-12-14 19:31:42,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=572, Invalid=2290, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 19:31:42,556 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 279 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:42,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 458 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:31:42,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-12-14 19:31:42,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 231. [2021-12-14 19:31:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 228 states have (on average 1.144736842105263) internal successors, (261), 230 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2021-12-14 19:31:42,561 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 43 [2021-12-14 19:31:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:42,561 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2021-12-14 19:31:42,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.8333333333333335) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2021-12-14 19:31:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 19:31:42,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:42,562 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:42,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:42,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:42,780 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:42,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1392056413, now seen corresponding path program 2 times [2021-12-14 19:31:42,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:42,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813745285] [2021-12-14 19:31:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:42,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 19:31:43,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813745285] [2021-12-14 19:31:43,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813745285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:43,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138580230] [2021-12-14 19:31:43,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:31:43,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:43,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:43,099 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:31:43,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-14 19:31:43,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:31:43,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:43,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-14 19:31:43,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:43,461 INFO L388 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 [2021-12-14 19:31:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:43,629 INFO L354 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2021-12-14 19:31:43,629 INFO L388 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 20 [2021-12-14 19:31:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 19:31:43,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:43,761 INFO L388 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 [2021-12-14 19:31:43,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:43,764 INFO L388 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 [2021-12-14 19:31:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 19:31:44,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138580230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:44,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:44,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2021-12-14 19:31:44,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301305605] [2021-12-14 19:31:44,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:44,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-14 19:31:44,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:44,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-14 19:31:44,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-12-14 19:31:44,154 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:44,721 INFO L93 Difference]: Finished difference Result 257 states and 288 transitions. [2021-12-14 19:31:44,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 19:31:44,722 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 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 43 [2021-12-14 19:31:44,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:44,722 INFO L225 Difference]: With dead ends: 257 [2021-12-14 19:31:44,722 INFO L226 Difference]: Without dead ends: 250 [2021-12-14 19:31:44,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=444, Invalid=2006, Unknown=0, NotChecked=0, Total=2450 [2021-12-14 19:31:44,723 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 194 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:44,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 192 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 294 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2021-12-14 19:31:44,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-14 19:31:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 238. [2021-12-14 19:31:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 237 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2021-12-14 19:31:44,726 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 43 [2021-12-14 19:31:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:44,727 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2021-12-14 19:31:44,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4594594594594597) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2021-12-14 19:31:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 19:31:44,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:44,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:44,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:44,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-12-14 19:31:44,935 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash -701284269, now seen corresponding path program 4 times [2021-12-14 19:31:44,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:44,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363572011] [2021-12-14 19:31:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:44,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:44,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 19:31:45,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:45,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363572011] [2021-12-14 19:31:45,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363572011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:45,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268651778] [2021-12-14 19:31:45,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:31:45,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:45,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:45,047 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:31:45,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-14 19:31:45,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:31:45,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-14 19:31:45,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:45,164 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:45,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:45,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:31:45,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 19:31:45,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-14 19:31:45,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-14 19:31:45,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:31:45,486 INFO L388 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 21 treesize of output 21 [2021-12-14 19:31:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 19:31:45,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:45,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:31:45,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-14 19:31:45,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:31:45,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-14 19:31:45,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-14 19:31:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-14 19:31:46,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268651778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:46,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:46,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2021-12-14 19:31:46,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240071784] [2021-12-14 19:31:46,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:46,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-14 19:31:46,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-14 19:31:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=715, Unknown=10, NotChecked=0, Total=812 [2021-12-14 19:31:46,378 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:47,369 INFO L93 Difference]: Finished difference Result 246 states and 271 transitions. [2021-12-14 19:31:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-14 19:31:47,369 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-14 19:31:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:47,370 INFO L225 Difference]: With dead ends: 246 [2021-12-14 19:31:47,370 INFO L226 Difference]: Without dead ends: 246 [2021-12-14 19:31:47,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=450, Invalid=2192, Unknown=10, NotChecked=0, Total=2652 [2021-12-14 19:31:47,371 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 182 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:47,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 417 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 423 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2021-12-14 19:31:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-14 19:31:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 219. [2021-12-14 19:31:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 217 states have (on average 1.1382488479262673) internal successors, (247), 218 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 247 transitions. [2021-12-14 19:31:47,376 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 247 transitions. Word has length 44 [2021-12-14 19:31:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:47,376 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 247 transitions. [2021-12-14 19:31:47,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:47,376 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 247 transitions. [2021-12-14 19:31:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-14 19:31:47,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:47,377 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:47,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-14 19:31:47,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:47,599 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:47,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:47,599 INFO L85 PathProgramCache]: Analyzing trace with hash -840498235, now seen corresponding path program 8 times [2021-12-14 19:31:47,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:47,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854007264] [2021-12-14 19:31:47,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:47,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:48,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:48,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854007264] [2021-12-14 19:31:48,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854007264] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:48,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399174809] [2021-12-14 19:31:48,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 19:31:48,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:48,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:48,258 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:31:48,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-14 19:31:48,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 19:31:48,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:48,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-14 19:31:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:48,690 INFO L388 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 [2021-12-14 19:31:49,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:49,337 INFO L354 Elim1Store]: treesize reduction 33, result has 48.4 percent of original size [2021-12-14 19:31:49,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 53 [2021-12-14 19:31:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:49,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:49,648 INFO L388 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 74 treesize of output 64 [2021-12-14 19:31:49,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:49,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2021-12-14 19:31:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:50,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399174809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:50,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:50,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 55 [2021-12-14 19:31:50,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427315270] [2021-12-14 19:31:50,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:50,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-12-14 19:31:50,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:50,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-12-14 19:31:50,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2652, Unknown=0, NotChecked=0, Total=2970 [2021-12-14 19:31:50,269 INFO L87 Difference]: Start difference. First operand 219 states and 247 transitions. Second operand has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:51,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:51,672 INFO L93 Difference]: Finished difference Result 309 states and 347 transitions. [2021-12-14 19:31:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-14 19:31:51,673 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 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 45 [2021-12-14 19:31:51,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:51,674 INFO L225 Difference]: With dead ends: 309 [2021-12-14 19:31:51,674 INFO L226 Difference]: Without dead ends: 296 [2021-12-14 19:31:51,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=878, Invalid=4822, Unknown=0, NotChecked=0, Total=5700 [2021-12-14 19:31:51,675 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:51,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 288 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 421 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2021-12-14 19:31:51,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-14 19:31:51,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 253. [2021-12-14 19:31:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 251 states have (on average 1.1474103585657371) internal successors, (288), 252 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 288 transitions. [2021-12-14 19:31:51,679 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 288 transitions. Word has length 45 [2021-12-14 19:31:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:51,680 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 288 transitions. [2021-12-14 19:31:51,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 288 transitions. [2021-12-14 19:31:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-14 19:31:51,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:51,681 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:51,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-14 19:31:51,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:51,881 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:51,882 INFO L85 PathProgramCache]: Analyzing trace with hash 800775488, now seen corresponding path program 3 times [2021-12-14 19:31:51,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:51,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166593145] [2021-12-14 19:31:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:51,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:31:52,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166593145] [2021-12-14 19:31:52,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166593145] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994615118] [2021-12-14 19:31:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:31:52,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:52,053 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:31:52,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-14 19:31:52,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-14 19:31:52,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:52,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-14 19:31:52,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:52,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-14 19:31:52,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:31:52,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-12-14 19:31:52,408 INFO L388 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 [2021-12-14 19:31:54,617 INFO L354 Elim1Store]: treesize reduction 2, result has 93.5 percent of original size [2021-12-14 19:31:54,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2021-12-14 19:31:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-14 19:31:54,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:55,512 INFO L388 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 27 treesize of output 23 [2021-12-14 19:31:55,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 19:31:55,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 39 treesize of output 43 [2021-12-14 19:31:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:31:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-14 19:31:56,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994615118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:56,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:56,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 40 [2021-12-14 19:31:56,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449423014] [2021-12-14 19:31:56,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:56,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-14 19:31:56,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-14 19:31:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1475, Unknown=1, NotChecked=0, Total=1640 [2021-12-14 19:31:56,064 INFO L87 Difference]: Start difference. First operand 253 states and 288 transitions. Second operand has 41 states, 40 states have (on average 2.7) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:57,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:57,566 INFO L93 Difference]: Finished difference Result 319 states and 353 transitions. [2021-12-14 19:31:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-14 19:31:57,567 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.7) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 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 47 [2021-12-14 19:31:57,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:57,567 INFO L225 Difference]: With dead ends: 319 [2021-12-14 19:31:57,567 INFO L226 Difference]: Without dead ends: 281 [2021-12-14 19:31:57,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=560, Invalid=5139, Unknown=1, NotChecked=0, Total=5700 [2021-12-14 19:31:57,568 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:57,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 385 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 711 Invalid, 0 Unknown, 192 Unchecked, 0.3s Time] [2021-12-14 19:31:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-12-14 19:31:57,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 231. [2021-12-14 19:31:57,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 230 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:57,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 261 transitions. [2021-12-14 19:31:57,573 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 261 transitions. Word has length 47 [2021-12-14 19:31:57,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:57,573 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 261 transitions. [2021-12-14 19:31:57,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.7) internal successors, (108), 41 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 261 transitions. [2021-12-14 19:31:57,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-14 19:31:57,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:57,574 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:57,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-14 19:31:57,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:57,783 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:31:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:31:57,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1117402914, now seen corresponding path program 9 times [2021-12-14 19:31:57,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:31:57,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366625773] [2021-12-14 19:31:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:31:57,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:31:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:31:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:58,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:31:58,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366625773] [2021-12-14 19:31:58,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366625773] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:31:58,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477600069] [2021-12-14 19:31:58,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 19:31:58,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:31:58,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:31:58,025 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:31:58,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-14 19:31:58,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-14 19:31:58,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:31:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-14 19:31:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:31:58,145 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:31:58,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:31:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 45 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:58,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:31:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:31:59,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477600069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:31:59,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:31:59,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2021-12-14 19:31:59,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935067316] [2021-12-14 19:31:59,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:31:59,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-14 19:31:59,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:31:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-14 19:31:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2083, Unknown=0, NotChecked=0, Total=2450 [2021-12-14 19:31:59,103 INFO L87 Difference]: Start difference. First operand 231 states and 261 transitions. Second operand has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:31:59,837 INFO L93 Difference]: Finished difference Result 377 states and 414 transitions. [2021-12-14 19:31:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 19:31:59,837 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-14 19:31:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:31:59,839 INFO L225 Difference]: With dead ends: 377 [2021-12-14 19:31:59,839 INFO L226 Difference]: Without dead ends: 377 [2021-12-14 19:31:59,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=845, Invalid=3187, Unknown=0, NotChecked=0, Total=4032 [2021-12-14 19:31:59,840 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 402 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 19:31:59,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 386 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 19:31:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-12-14 19:31:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 237. [2021-12-14 19:31:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 235 states have (on average 1.1446808510638298) internal successors, (269), 236 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 269 transitions. [2021-12-14 19:31:59,844 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 269 transitions. Word has length 49 [2021-12-14 19:31:59,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:31:59,845 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 269 transitions. [2021-12-14 19:31:59,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.795918367346939) internal successors, (137), 50 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:31:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 269 transitions. [2021-12-14 19:31:59,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 19:31:59,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:31:59,846 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:31:59,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:00,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:00,059 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash 82376955, now seen corresponding path program 10 times [2021-12-14 19:32:00,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:00,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114673695] [2021-12-14 19:32:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:00,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 30 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 19:32:00,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:00,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114673695] [2021-12-14 19:32:00,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114673695] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:00,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816779718] [2021-12-14 19:32:00,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:32:00,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:00,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:00,780 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:00,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-14 19:32:00,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 19:32:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 19:32:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-14 19:32:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 19:32:00,902 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-14 19:32:00,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-12-14 19:32:01,409 INFO L388 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 [2021-12-14 19:32:02,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 19:32:02,121 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-12-14 19:32:02,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 65 [2021-12-14 19:32:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:02,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 19:32:02,937 INFO L388 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 89 treesize of output 77 [2021-12-14 19:32:02,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 19:32:02,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 123 [2021-12-14 19:32:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 43 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 19:32:03,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816779718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 19:32:03,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 19:32:03,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 73 [2021-12-14 19:32:03,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428492855] [2021-12-14 19:32:03,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 19:32:03,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-14 19:32:03,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 19:32:03,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-14 19:32:03,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=4754, Unknown=0, NotChecked=0, Total=5256 [2021-12-14 19:32:03,759 INFO L87 Difference]: Start difference. First operand 237 states and 269 transitions. Second operand has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:07,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 19:32:07,137 INFO L93 Difference]: Finished difference Result 424 states and 467 transitions. [2021-12-14 19:32:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-14 19:32:07,138 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-14 19:32:07,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 19:32:07,139 INFO L225 Difference]: With dead ends: 424 [2021-12-14 19:32:07,139 INFO L226 Difference]: Without dead ends: 409 [2021-12-14 19:32:07,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1804, Invalid=11306, Unknown=0, NotChecked=0, Total=13110 [2021-12-14 19:32:07,140 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 564 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-14 19:32:07,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 433 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 864 Invalid, 0 Unknown, 132 Unchecked, 0.5s Time] [2021-12-14 19:32:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-12-14 19:32:07,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 279. [2021-12-14 19:32:07,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.148014440433213) internal successors, (318), 278 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 318 transitions. [2021-12-14 19:32:07,148 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 318 transitions. Word has length 51 [2021-12-14 19:32:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 19:32:07,148 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 318 transitions. [2021-12-14 19:32:07,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.917808219178082) internal successors, (140), 73 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 19:32:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 318 transitions. [2021-12-14 19:32:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-14 19:32:07,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 19:32:07,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 19:32:07,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-12-14 19:32:07,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-14 19:32:07,372 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-12-14 19:32:07,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 19:32:07,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1816113278, now seen corresponding path program 4 times [2021-12-14 19:32:07,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 19:32:07,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21947671] [2021-12-14 19:32:07,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 19:32:07,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 19:32:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 19:32:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-14 19:32:07,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 19:32:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21947671] [2021-12-14 19:32:07,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21947671] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 19:32:07,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285616113] [2021-12-14 19:32:07,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 19:32:07,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 19:32:07,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 19:32:07,536 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 19:32:07,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process