./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-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 e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 05:47:58,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 05:47:58,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 05:47:58,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 05:47:58,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 05:47:58,299 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 05:47:58,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 05:47:58,305 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 05:47:58,307 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 05:47:58,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 05:47:58,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 05:47:58,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 05:47:58,314 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 05:47:58,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 05:47:58,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 05:47:58,320 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 05:47:58,321 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 05:47:58,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 05:47:58,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 05:47:58,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 05:47:58,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 05:47:58,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 05:47:58,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 05:47:58,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 05:47:58,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 05:47:58,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 05:47:58,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 05:47:58,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 05:47:58,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 05:47:58,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 05:47:58,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 05:47:58,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 05:47:58,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 05:47:58,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 05:47:58,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 05:47:58,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 05:47:58,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 05:47:58,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 05:47:58,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 05:47:58,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 05:47:58,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 05:47:58,352 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 05:47:58,382 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 05:47:58,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 05:47:58,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 05:47:58,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 05:47:58,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 05:47:58,385 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 05:47:58,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 05:47:58,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 05:47:58,385 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 05:47:58,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 05:47:58,387 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 05:47:58,387 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 05:47:58,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 05:47:58,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 05:47:58,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 05:47:58,388 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 05:47:58,388 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 05:47:58,388 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 05:47:58,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 05:47:58,389 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 05:47:58,389 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 05:47:58,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 05:47:58,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 05:47:58,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 05:47:58,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 05:47:58,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:47:58,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 05:47:58,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 05:47:58,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 05:47:58,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 05:47:58,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 05:47:58,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2021-12-16 05:47:58,639 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 05:47:58,663 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 05:47:58,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 05:47:58,668 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 05:47:58,668 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 05:47:58,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-16 05:47:58,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fcd04dc3/d77fe6794fc844a0a92562ee51da95d2/FLAG69ebec7b2 [2021-12-16 05:47:59,205 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 05:47:59,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2021-12-16 05:47:59,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fcd04dc3/d77fe6794fc844a0a92562ee51da95d2/FLAG69ebec7b2 [2021-12-16 05:47:59,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0fcd04dc3/d77fe6794fc844a0a92562ee51da95d2 [2021-12-16 05:47:59,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 05:47:59,569 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 05:47:59,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 05:47:59,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 05:47:59,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 05:47:59,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:47:59" (1/1) ... [2021-12-16 05:47:59,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26206e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:47:59, skipping insertion in model container [2021-12-16 05:47:59,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:47:59" (1/1) ... [2021-12-16 05:47:59,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 05:47:59,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 05:47:59,971 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:47:59,980 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 05:48:00,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 05:48:00,054 INFO L208 MainTranslator]: Completed translation [2021-12-16 05:48:00,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00 WrapperNode [2021-12-16 05:48:00,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 05:48:00,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 05:48:00,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 05:48:00,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 05:48:00,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,072 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,091 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2021-12-16 05:48:00,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 05:48:00,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 05:48:00,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 05:48:00,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 05:48:00,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 05:48:00,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 05:48:00,113 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 05:48:00,113 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 05:48:00,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (1/1) ... [2021-12-16 05:48:00,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 05:48:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:00,145 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) [2021-12-16 05:48:00,146 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 [2021-12-16 05:48:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 05:48:00,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 05:48:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 05:48:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 05:48:00,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 05:48:00,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 05:48:00,315 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 05:48:00,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 05:48:00,563 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 05:48:00,568 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 05:48:00,572 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 05:48:00,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:48:00 BoogieIcfgContainer [2021-12-16 05:48:00,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 05:48:00,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 05:48:00,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 05:48:00,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 05:48:00,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:47:59" (1/3) ... [2021-12-16 05:48:00,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af67ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:48:00, skipping insertion in model container [2021-12-16 05:48:00,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:48:00" (2/3) ... [2021-12-16 05:48:00,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af67ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:48:00, skipping insertion in model container [2021-12-16 05:48:00,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:48:00" (3/3) ... [2021-12-16 05:48:00,583 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2021-12-16 05:48:00,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 05:48:00,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-12-16 05:48:00,636 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 05:48:00,643 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 [2021-12-16 05:48:00,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-12-16 05:48:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) 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) [2021-12-16 05:48:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:48:00,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:00,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:00,670 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:00,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-16 05:48:00,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:00,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86470550] [2021-12-16 05:48:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:00,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:00,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:00,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86470550] [2021-12-16 05:48:00,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86470550] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:00,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:00,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:48:00,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880470220] [2021-12-16 05:48:00,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:00,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:48:00,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:00,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:48:00,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:48:00,924 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:00,994 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2021-12-16 05:48:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:48:00,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:48:00,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,005 INFO L225 Difference]: With dead ends: 78 [2021-12-16 05:48:01,006 INFO L226 Difference]: Without dead ends: 74 [2021-12-16 05:48:01,008 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 [2021-12-16 05:48:01,011 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 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 [2021-12-16 05:48:01,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-16 05:48:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2021-12-16 05:48:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 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) [2021-12-16 05:48:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-12-16 05:48:01,039 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2021-12-16 05:48:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,040 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-12-16 05:48:01,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-12-16 05:48:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:48:01,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 05:48:01,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-16 05:48:01,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495647519] [2021-12-16 05:48:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:01,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495647519] [2021-12-16 05:48:01,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495647519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:48:01,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350037434] [2021-12-16 05:48:01,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:48:01,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:48:01,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:48:01,109 INFO L87 Difference]: Start difference. First operand 44 states and 50 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) [2021-12-16 05:48:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,159 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-12-16 05:48:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:48:01,161 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 [2021-12-16 05:48:01,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,162 INFO L225 Difference]: With dead ends: 42 [2021-12-16 05:48:01,162 INFO L226 Difference]: Without dead ends: 42 [2021-12-16 05:48:01,162 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 [2021-12-16 05:48:01,164 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 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 [2021-12-16 05:48:01,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-16 05:48:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-16 05:48:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) 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) [2021-12-16 05:48:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-16 05:48:01,173 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2021-12-16 05:48:01,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,174 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-16 05:48:01,174 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) [2021-12-16 05:48:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-16 05:48:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 05:48:01,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,176 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 05:48:01,177 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-16 05:48:01,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758580780] [2021-12-16 05:48:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:01,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758580780] [2021-12-16 05:48:01,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758580780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:48:01,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382226789] [2021-12-16 05:48:01,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:48:01,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:48:01,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:48:01,254 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,338 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-12-16 05:48:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:48:01,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 05:48:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,339 INFO L225 Difference]: With dead ends: 75 [2021-12-16 05:48:01,340 INFO L226 Difference]: Without dead ends: 75 [2021-12-16 05:48:01,340 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 [2021-12-16 05:48:01,341 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-16 05:48:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2021-12-16 05:48:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 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) [2021-12-16 05:48:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2021-12-16 05:48:01,347 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2021-12-16 05:48:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,348 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2021-12-16 05:48:01,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2021-12-16 05:48:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 05:48:01,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,349 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 05:48:01,349 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,350 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-16 05:48:01,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911033314] [2021-12-16 05:48:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:01,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911033314] [2021-12-16 05:48:01,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911033314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:48:01,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341183813] [2021-12-16 05:48:01,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:48:01,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:48:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:48:01,416 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,455 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-12-16 05:48:01,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:48:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 05:48:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,456 INFO L225 Difference]: With dead ends: 43 [2021-12-16 05:48:01,457 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 05:48:01,457 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 [2021-12-16 05:48:01,458 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 32 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 [2021-12-16 05:48:01,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 05:48:01,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 05:48:01,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 42 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) [2021-12-16 05:48:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-16 05:48:01,470 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 9 [2021-12-16 05:48:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,470 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-16 05:48:01,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,471 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-16 05:48:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 05:48:01,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 05:48:01,472 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-16 05:48:01,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103996741] [2021-12-16 05:48:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:01,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103996741] [2021-12-16 05:48:01,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103996741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:48:01,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28476274] [2021-12-16 05:48:01,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:48:01,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:48:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:48:01,543 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,565 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-12-16 05:48:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:48:01,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 05:48:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,567 INFO L225 Difference]: With dead ends: 76 [2021-12-16 05:48:01,567 INFO L226 Difference]: Without dead ends: 76 [2021-12-16 05:48:01,567 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 [2021-12-16 05:48:01,568 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-16 05:48:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-12-16 05:48:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-12-16 05:48:01,574 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 9 [2021-12-16 05:48:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,574 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-12-16 05:48:01,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-12-16 05:48:01,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 05:48:01,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 05:48:01,576 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,576 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-16 05:48:01,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094393257] [2021-12-16 05:48:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:01,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094393257] [2021-12-16 05:48:01,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094393257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 05:48:01,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12907374] [2021-12-16 05:48:01,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 05:48:01,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 05:48:01,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 05:48:01,614 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,633 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-12-16 05:48:01,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 05:48:01,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 05:48:01,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,638 INFO L225 Difference]: With dead ends: 52 [2021-12-16 05:48:01,638 INFO L226 Difference]: Without dead ends: 52 [2021-12-16 05:48:01,638 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 [2021-12-16 05:48:01,645 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-16 05:48:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-16 05:48:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-12-16 05:48:01,651 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 9 [2021-12-16 05:48:01,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,652 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-12-16 05:48:01,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-12-16 05:48:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-16 05:48:01,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 05:48:01,653 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,654 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-16 05:48:01,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981204271] [2021-12-16 05:48:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:01,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981204271] [2021-12-16 05:48:01,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981204271] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:48:01,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932425477] [2021-12-16 05:48:01,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:48:01,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:48:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:48:01,754 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,811 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2021-12-16 05:48:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:48:01,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-16 05:48:01,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,812 INFO L225 Difference]: With dead ends: 76 [2021-12-16 05:48:01,814 INFO L226 Difference]: Without dead ends: 76 [2021-12-16 05:48:01,814 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 [2021-12-16 05:48:01,819 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 73 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-16 05:48:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-12-16 05:48:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 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) [2021-12-16 05:48:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-12-16 05:48:01,834 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2021-12-16 05:48:01,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,835 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-12-16 05:48:01,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,837 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-12-16 05:48:01,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-16 05:48:01,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 05:48:01,847 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,849 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-16 05:48:01,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420398340] [2021-12-16 05:48:01,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:01,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:01,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420398340] [2021-12-16 05:48:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420398340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:01,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:01,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 05:48:01,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247944265] [2021-12-16 05:48:01,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:01,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 05:48:01,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:01,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 05:48:01,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-16 05:48:01,906 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:01,926 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2021-12-16 05:48:01,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:48:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-16 05:48:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:01,927 INFO L225 Difference]: With dead ends: 53 [2021-12-16 05:48:01,927 INFO L226 Difference]: Without dead ends: 53 [2021-12-16 05:48:01,927 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 [2021-12-16 05:48:01,928 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 63 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:01,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 29 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-16 05:48:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-16 05:48:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2021-12-16 05:48:01,931 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2021-12-16 05:48:01,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:01,932 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2021-12-16 05:48:01,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:01,932 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2021-12-16 05:48:01,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 05:48:01,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:01,933 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:01,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 05:48:01,933 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:01,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-16 05:48:01,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:01,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325549323] [2021-12-16 05:48:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:01,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:02,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:02,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325549323] [2021-12-16 05:48:02,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325549323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:02,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070114088] [2021-12-16 05:48:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:02,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:02,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:02,021 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) [2021-12-16 05:48:02,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 05:48:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:02,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-16 05:48:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:02,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:02,186 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 [2021-12-16 05:48:02,199 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 [2021-12-16 05:48:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:02,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:02,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:02,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070114088] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:02,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:02,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-12-16 05:48:02,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337854370] [2021-12-16 05:48:02,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:02,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:48:02,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:02,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:48:02,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:48:02,523 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:02,683 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2021-12-16 05:48:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:48:02,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 05:48:02,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:02,685 INFO L225 Difference]: With dead ends: 116 [2021-12-16 05:48:02,685 INFO L226 Difference]: Without dead ends: 116 [2021-12-16 05:48:02,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:48:02,687 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 205 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:02,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 183 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:02,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-16 05:48:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2021-12-16 05:48:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 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) [2021-12-16 05:48:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2021-12-16 05:48:02,696 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2021-12-16 05:48:02,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:02,696 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2021-12-16 05:48:02,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2021-12-16 05:48:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:48:02,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:02,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:02,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:02,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:02,916 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:02,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:02,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2021-12-16 05:48:02,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:02,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024405804] [2021-12-16 05:48:02,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:02,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:02,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:02,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024405804] [2021-12-16 05:48:02,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024405804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:02,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:02,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:48:02,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420186727] [2021-12-16 05:48:02,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:02,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:48:02,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:02,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:48:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:48:02,954 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:02,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:02,989 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-12-16 05:48:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 05:48:02,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 05:48:02,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:02,990 INFO L225 Difference]: With dead ends: 47 [2021-12-16 05:48:02,990 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 05:48:02,991 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 [2021-12-16 05:48:02,991 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:02,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 05:48:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-16 05:48:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 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) [2021-12-16 05:48:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-12-16 05:48:02,994 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2021-12-16 05:48:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:02,994 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-12-16 05:48:02,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-12-16 05:48:02,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:48:02,995 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:02,995 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:02,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 05:48:02,996 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:02,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:02,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2021-12-16 05:48:02,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:02,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344318542] [2021-12-16 05:48:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:02,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:03,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:03,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344318542] [2021-12-16 05:48:03,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344318542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:03,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:03,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 05:48:03,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419368190] [2021-12-16 05:48:03,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:03,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 05:48:03,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 05:48:03,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 05:48:03,075 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:03,144 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-12-16 05:48:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:48:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 05:48:03,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:03,146 INFO L225 Difference]: With dead ends: 50 [2021-12-16 05:48:03,146 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 05:48:03,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:48:03,147 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 67 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:03,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:03,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 05:48:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-16 05:48:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 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) [2021-12-16 05:48:03,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-12-16 05:48:03,155 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2021-12-16 05:48:03,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:03,156 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-12-16 05:48:03,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-12-16 05:48:03,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 05:48:03,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:03,157 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:03,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 05:48:03,157 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:03,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:03,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-16 05:48:03,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:03,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113730778] [2021-12-16 05:48:03,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:03,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113730778] [2021-12-16 05:48:03,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113730778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123742443] [2021-12-16 05:48:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:03,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:03,250 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) [2021-12-16 05:48:03,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 05:48:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 05:48:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:03,329 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:03,330 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 [2021-12-16 05:48:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:03,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:03,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123742443] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:03,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:03,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-16 05:48:03,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262960379] [2021-12-16 05:48:03,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:03,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-16 05:48:03,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-16 05:48:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-16 05:48:03,594 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:03,717 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2021-12-16 05:48:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 05:48:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 05:48:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:03,718 INFO L225 Difference]: With dead ends: 91 [2021-12-16 05:48:03,719 INFO L226 Difference]: Without dead ends: 91 [2021-12-16 05:48:03,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:48:03,719 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 178 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:03,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 170 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:03,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-16 05:48:03,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2021-12-16 05:48:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-12-16 05:48:03,722 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2021-12-16 05:48:03,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:03,722 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-12-16 05:48:03,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:03,722 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-12-16 05:48:03,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 05:48:03,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:03,723 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:03,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:03,931 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 [2021-12-16 05:48:03,932 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2021-12-16 05:48:03,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811771220] [2021-12-16 05:48:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:03,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:03,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:03,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811771220] [2021-12-16 05:48:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811771220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:03,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:03,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 05:48:03,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695516836] [2021-12-16 05:48:03,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:03,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 05:48:03,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 05:48:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 05:48:03,978 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:04,032 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-16 05:48:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 05:48:04,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 05:48:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:04,033 INFO L225 Difference]: With dead ends: 46 [2021-12-16 05:48:04,034 INFO L226 Difference]: Without dead ends: 46 [2021-12-16 05:48:04,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 05:48:04,034 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:04,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-16 05:48:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-12-16 05:48:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 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) [2021-12-16 05:48:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-16 05:48:04,037 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2021-12-16 05:48:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:04,037 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-16 05:48:04,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-16 05:48:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 05:48:04,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:04,038 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:04,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 05:48:04,039 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:04,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2021-12-16 05:48:04,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:04,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348082998] [2021-12-16 05:48:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:04,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:04,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:04,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348082998] [2021-12-16 05:48:04,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348082998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:04,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:04,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 05:48:04,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534224386] [2021-12-16 05:48:04,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:04,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 05:48:04,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:04,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 05:48:04,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 05:48:04,117 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:04,192 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2021-12-16 05:48:04,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 05:48:04,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 05:48:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:04,193 INFO L225 Difference]: With dead ends: 49 [2021-12-16 05:48:04,193 INFO L226 Difference]: Without dead ends: 49 [2021-12-16 05:48:04,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:48:04,194 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:04,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 85 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-16 05:48:04,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-12-16 05:48:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 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) [2021-12-16 05:48:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-12-16 05:48:04,196 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2021-12-16 05:48:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:04,197 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-12-16 05:48:04,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-12-16 05:48:04,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:48:04,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:04,198 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] [2021-12-16 05:48:04,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 05:48:04,198 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:04,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2021-12-16 05:48:04,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:04,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945233866] [2021-12-16 05:48:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:04,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:04,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:04,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945233866] [2021-12-16 05:48:04,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945233866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:04,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:04,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 05:48:04,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099145191] [2021-12-16 05:48:04,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:04,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 05:48:04,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 05:48:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:48:04,379 INFO L87 Difference]: Start difference. First operand 47 states and 54 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) [2021-12-16 05:48:04,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:04,394 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-12-16 05:48:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 05:48:04,395 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 [2021-12-16 05:48:04,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:04,396 INFO L225 Difference]: With dead ends: 46 [2021-12-16 05:48:04,396 INFO L226 Difference]: Without dead ends: 43 [2021-12-16 05:48:04,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 05:48:04,397 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 42 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 52 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 [2021-12-16 05:48:04,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 52 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-16 05:48:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-16 05:48:04,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 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) [2021-12-16 05:48:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2021-12-16 05:48:04,399 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2021-12-16 05:48:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:04,399 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2021-12-16 05:48:04,400 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) [2021-12-16 05:48:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2021-12-16 05:48:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:48:04,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:04,400 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] [2021-12-16 05:48:04,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 05:48:04,401 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2021-12-16 05:48:04,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:04,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705842862] [2021-12-16 05:48:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:04,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:04,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:04,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:04,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705842862] [2021-12-16 05:48:04,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705842862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:04,508 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:04,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 05:48:04,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178735652] [2021-12-16 05:48:04,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:04,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:48:04,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:04,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:48:04,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:48:04,510 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-12-16 05:48:04,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:04,650 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-12-16 05:48:04,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 05:48:04,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 [2021-12-16 05:48:04,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:04,652 INFO L225 Difference]: With dead ends: 53 [2021-12-16 05:48:04,652 INFO L226 Difference]: Without dead ends: 34 [2021-12-16 05:48:04,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:48:04,653 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:04,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:04,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-16 05:48:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-16 05:48:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-12-16 05:48:04,656 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2021-12-16 05:48:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:04,656 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-12-16 05:48:04,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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) [2021-12-16 05:48:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-12-16 05:48:04,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-16 05:48:04,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:04,657 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] [2021-12-16 05:48:04,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 05:48:04,657 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:04,658 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2021-12-16 05:48:04,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:04,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204444761] [2021-12-16 05:48:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:04,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:04,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:04,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204444761] [2021-12-16 05:48:04,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204444761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:04,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:04,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-16 05:48:04,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107001542] [2021-12-16 05:48:04,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:04,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 05:48:04,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:04,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 05:48:04,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-16 05:48:04,807 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2021-12-16 05:48:04,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:04,925 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-12-16 05:48:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:48:04,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 [2021-12-16 05:48:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:04,927 INFO L225 Difference]: With dead ends: 48 [2021-12-16 05:48:04,928 INFO L226 Difference]: Without dead ends: 38 [2021-12-16 05:48:04,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:48:04,929 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 93 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:04,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 147 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 05:48:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-16 05:48:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-16 05:48:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-12-16 05:48:04,931 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2021-12-16 05:48:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:04,931 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-12-16 05:48:04,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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) [2021-12-16 05:48:04,931 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-12-16 05:48:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:48:04,933 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:04,934 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] [2021-12-16 05:48:04,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 05:48:04,934 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:04,934 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2021-12-16 05:48:04,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:04,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474410099] [2021-12-16 05:48:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:04,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:05,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:05,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474410099] [2021-12-16 05:48:05,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474410099] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:05,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350973222] [2021-12-16 05:48:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:05,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:05,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:05,094 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) [2021-12-16 05:48:05,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 05:48:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:05,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 05:48:05,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:05,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:05,494 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 [2021-12-16 05:48:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:05,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350973222] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:05,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:05,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2021-12-16 05:48:05,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539709268] [2021-12-16 05:48:05,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:05,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 05:48:05,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:05,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 05:48:05,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-12-16 05:48:05,527 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:05,887 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-12-16 05:48:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:48:05,887 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-16 05:48:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:05,888 INFO L225 Difference]: With dead ends: 49 [2021-12-16 05:48:05,888 INFO L226 Difference]: Without dead ends: 49 [2021-12-16 05:48:05,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2021-12-16 05:48:05,889 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:05,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 237 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-16 05:48:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-12-16 05:48:05,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 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) [2021-12-16 05:48:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-12-16 05:48:05,891 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2021-12-16 05:48:05,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:05,891 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-12-16 05:48:05,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-12-16 05:48:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:48:05,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:05,892 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] [2021-12-16 05:48:05,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:06,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-16 05:48:06,101 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2021-12-16 05:48:06,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:06,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95252490] [2021-12-16 05:48:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:06,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:06,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:06,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95252490] [2021-12-16 05:48:06,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95252490] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:06,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:06,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 05:48:06,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689926688] [2021-12-16 05:48:06,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:06,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 05:48:06,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:06,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 05:48:06,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 05:48:06,212 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) [2021-12-16 05:48:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:06,337 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-16 05:48:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:48:06,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 [2021-12-16 05:48:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:06,338 INFO L225 Difference]: With dead ends: 65 [2021-12-16 05:48:06,338 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 05:48:06,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-12-16 05:48:06,339 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:06,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 175 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:06,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 05:48:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-12-16 05:48:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 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) [2021-12-16 05:48:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-12-16 05:48:06,341 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2021-12-16 05:48:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:06,341 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-12-16 05:48:06,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) [2021-12-16 05:48:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-12-16 05:48:06,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-16 05:48:06,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:06,342 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] [2021-12-16 05:48:06,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 05:48:06,342 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:06,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2021-12-16 05:48:06,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:06,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312586249] [2021-12-16 05:48:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:06,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:06,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:06,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312586249] [2021-12-16 05:48:06,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312586249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 05:48:06,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 05:48:06,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-16 05:48:06,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205640598] [2021-12-16 05:48:06,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 05:48:06,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 05:48:06,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:06,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 05:48:06,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-16 05:48:06,505 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2021-12-16 05:48:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:06,650 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2021-12-16 05:48:06,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 05:48:06,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 [2021-12-16 05:48:06,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:06,651 INFO L225 Difference]: With dead ends: 93 [2021-12-16 05:48:06,651 INFO L226 Difference]: Without dead ends: 93 [2021-12-16 05:48:06,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-16 05:48:06,652 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:06,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 153 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 05:48:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-16 05:48:06,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2021-12-16 05:48:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:06,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-12-16 05:48:06,654 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2021-12-16 05:48:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:06,654 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-12-16 05:48:06,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) [2021-12-16 05:48:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-12-16 05:48:06,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-16 05:48:06,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:06,655 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, 1] [2021-12-16 05:48:06,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 05:48:06,655 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2021-12-16 05:48:06,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:06,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798649533] [2021-12-16 05:48:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:06,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:06,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:06,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798649533] [2021-12-16 05:48:06,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798649533] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:06,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852165377] [2021-12-16 05:48:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:06,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:06,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:06,764 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) [2021-12-16 05:48:06,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 05:48:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 05:48:06,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:06,867 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 [2021-12-16 05:48:06,870 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 [2021-12-16 05:48:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:07,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:07,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852165377] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:07,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:07,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2021-12-16 05:48:07,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880404086] [2021-12-16 05:48:07,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:07,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-16 05:48:07,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:07,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-16 05:48:07,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-16 05:48:07,296 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:07,668 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2021-12-16 05:48:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 05:48:07,668 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-16 05:48:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:07,669 INFO L225 Difference]: With dead ends: 86 [2021-12-16 05:48:07,669 INFO L226 Difference]: Without dead ends: 86 [2021-12-16 05:48:07,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-12-16 05:48:07,670 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 178 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:07,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 340 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-16 05:48:07,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-12-16 05:48:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 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) [2021-12-16 05:48:07,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-12-16 05:48:07,673 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2021-12-16 05:48:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:07,673 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-12-16 05:48:07,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.761904761904762) internal successors, (79), 22 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-12-16 05:48:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 05:48:07,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:07,674 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:07,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:07,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:07,874 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:07,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2021-12-16 05:48:07,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:07,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588008764] [2021-12-16 05:48:07,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:07,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:08,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:08,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588008764] [2021-12-16 05:48:08,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588008764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:08,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360142266] [2021-12-16 05:48:08,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:08,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:08,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:08,067 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) [2021-12-16 05:48:08,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 05:48:08,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:08,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 05:48:08,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:08,238 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 [2021-12-16 05:48:08,622 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-16 05:48:08,622 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 28 treesize of output 14 [2021-12-16 05:48:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:08,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:08,914 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 [2021-12-16 05:48:08,919 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 05:48:08,920 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 45 treesize of output 39 [2021-12-16 05:48:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:09,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360142266] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:09,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:09,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 39 [2021-12-16 05:48:09,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821488092] [2021-12-16 05:48:09,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:09,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 05:48:09,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:09,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 05:48:09,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1322, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 05:48:09,084 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:09,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:09,635 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-12-16 05:48:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-16 05:48:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-16 05:48:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:09,638 INFO L225 Difference]: With dead ends: 127 [2021-12-16 05:48:09,639 INFO L226 Difference]: Without dead ends: 108 [2021-12-16 05:48:09,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=328, Invalid=2324, Unknown=0, NotChecked=0, Total=2652 [2021-12-16 05:48:09,640 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 118 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:09,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 300 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 238 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2021-12-16 05:48:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-12-16 05:48:09,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2021-12-16 05:48:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 98 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-12-16 05:48:09,642 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 30 [2021-12-16 05:48:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:09,645 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-12-16 05:48:09,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-12-16 05:48:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 05:48:09,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:09,646 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:09,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:09,859 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,SelfDestructingSolverStorable21 [2021-12-16 05:48:09,859 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:09,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash -663599108, now seen corresponding path program 3 times [2021-12-16 05:48:09,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:09,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767776418] [2021-12-16 05:48:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:09,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:10,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:10,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767776418] [2021-12-16 05:48:10,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767776418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:10,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906582933] [2021-12-16 05:48:10,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:48:10,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:10,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:10,022 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) [2021-12-16 05:48:10,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 05:48:10,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 05:48:10,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-16 05:48:10,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:10,121 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:10,121 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 [2021-12-16 05:48:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:10,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:10,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906582933] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:10,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:10,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2021-12-16 05:48:10,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187898851] [2021-12-16 05:48:10,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:10,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 05:48:10,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 05:48:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 05:48:10,769 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 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) [2021-12-16 05:48:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:11,165 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2021-12-16 05:48:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 05:48:11,166 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 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 34 [2021-12-16 05:48:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:11,166 INFO L225 Difference]: With dead ends: 151 [2021-12-16 05:48:11,166 INFO L226 Difference]: Without dead ends: 151 [2021-12-16 05:48:11,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=350, Invalid=1456, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 05:48:11,167 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 391 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:11,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 255 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-16 05:48:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2021-12-16 05:48:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 129 states have (on average 1.1550387596899225) internal successors, (149), 130 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2021-12-16 05:48:11,170 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 34 [2021-12-16 05:48:11,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:11,171 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2021-12-16 05:48:11,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.9375) internal successors, (94), 33 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) [2021-12-16 05:48:11,171 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2021-12-16 05:48:11,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-16 05:48:11,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:11,172 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, 1] [2021-12-16 05:48:11,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:11,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:11,379 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:11,380 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2021-12-16 05:48:11,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:11,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073600999] [2021-12-16 05:48:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:11,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:11,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:11,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073600999] [2021-12-16 05:48:11,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073600999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:11,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713658369] [2021-12-16 05:48:11,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:11,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:11,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:11,589 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) [2021-12-16 05:48:11,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 05:48:11,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:11,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:11,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-16 05:48:11,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:11,675 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 [2021-12-16 05:48:11,812 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 14 treesize of output 10 [2021-12-16 05:48:11,859 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 17 treesize of output 19 [2021-12-16 05:48:11,953 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 [2021-12-16 05:48:11,982 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:11,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:12,076 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_297 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_297) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2021-12-16 05:48:12,107 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:12,107 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 [2021-12-16 05:48:12,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:12,113 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 [2021-12-16 05:48:12,116 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 [2021-12-16 05:48:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:12,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713658369] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:12,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:12,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-12-16 05:48:12,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821763383] [2021-12-16 05:48:12,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:12,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-16 05:48:12,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-16 05:48:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=569, Unknown=1, NotChecked=48, Total=702 [2021-12-16 05:48:12,370 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) [2021-12-16 05:48:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:12,814 INFO L93 Difference]: Finished difference Result 220 states and 244 transitions. [2021-12-16 05:48:12,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:48:12,815 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 37 [2021-12-16 05:48:12,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:12,816 INFO L225 Difference]: With dead ends: 220 [2021-12-16 05:48:12,816 INFO L226 Difference]: Without dead ends: 220 [2021-12-16 05:48:12,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1358, Unknown=1, NotChecked=76, Total=1640 [2021-12-16 05:48:12,817 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 139 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:12,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 534 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 347 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2021-12-16 05:48:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-16 05:48:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 182. [2021-12-16 05:48:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 180 states have (on average 1.15) internal successors, (207), 181 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:12,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2021-12-16 05:48:12,822 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 37 [2021-12-16 05:48:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:12,822 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2021-12-16 05:48:12,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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) [2021-12-16 05:48:12,822 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2021-12-16 05:48:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 05:48:12,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:12,823 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:12,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:13,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:13,043 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:13,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:13,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 4 times [2021-12-16 05:48:13,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:13,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812523101] [2021-12-16 05:48:13,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:13,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:13,230 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:13,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812523101] [2021-12-16 05:48:13,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812523101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:13,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458456381] [2021-12-16 05:48:13,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:48:13,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:13,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:13,233 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) [2021-12-16 05:48:13,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 05:48:13,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:48:13,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:13,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 05:48:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:13,377 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:13,377 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 [2021-12-16 05:48:13,564 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 [2021-12-16 05:48:13,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:13,908 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-16 05:48:13,917 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:13,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:14,281 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 [2021-12-16 05:48:14,284 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 [2021-12-16 05:48:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:14,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458456381] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:14,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:14,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2021-12-16 05:48:14,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346684519] [2021-12-16 05:48:14,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:14,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-16 05:48:14,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:14,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-16 05:48:14,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2021-12-16 05:48:14,620 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:15,205 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2021-12-16 05:48:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 05:48:15,205 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 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 [2021-12-16 05:48:15,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:15,208 INFO L225 Difference]: With dead ends: 271 [2021-12-16 05:48:15,208 INFO L226 Difference]: Without dead ends: 243 [2021-12-16 05:48:15,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=354, Invalid=3068, Unknown=0, NotChecked=0, Total=3422 [2021-12-16 05:48:15,209 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:15,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 556 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 261 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2021-12-16 05:48:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-16 05:48:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 226. [2021-12-16 05:48:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.1383928571428572) internal successors, (255), 225 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 255 transitions. [2021-12-16 05:48:15,220 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 255 transitions. Word has length 39 [2021-12-16 05:48:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:15,220 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 255 transitions. [2021-12-16 05:48:15,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:15,221 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 255 transitions. [2021-12-16 05:48:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 05:48:15,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:15,222 INFO L514 BasicCegarLoop]: trace histogram [3, 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, 1] [2021-12-16 05:48:15,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:15,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-16 05:48:15,435 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:15,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2021-12-16 05:48:15,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:15,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419219343] [2021-12-16 05:48:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:15,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:15,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419219343] [2021-12-16 05:48:15,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419219343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:15,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155612171] [2021-12-16 05:48:15,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:48:15,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:15,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:15,575 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) [2021-12-16 05:48:15,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 05:48:15,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 05:48:15,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-16 05:48:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:15,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:16,045 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 21 treesize of output 17 [2021-12-16 05:48:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:16,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155612171] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:16,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:16,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2021-12-16 05:48:16,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767950285] [2021-12-16 05:48:16,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:16,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-16 05:48:16,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-16 05:48:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-12-16 05:48:16,185 INFO L87 Difference]: Start difference. First operand 226 states and 255 transitions. Second operand has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:16,556 INFO L93 Difference]: Finished difference Result 287 states and 320 transitions. [2021-12-16 05:48:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 05:48:16,557 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 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 [2021-12-16 05:48:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:16,558 INFO L225 Difference]: With dead ends: 287 [2021-12-16 05:48:16,558 INFO L226 Difference]: Without dead ends: 287 [2021-12-16 05:48:16,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:48:16,560 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 171 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:16,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 603 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-12-16 05:48:16,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 261. [2021-12-16 05:48:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 259 states have (on average 1.1467181467181466) internal successors, (297), 260 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 297 transitions. [2021-12-16 05:48:16,568 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 297 transitions. Word has length 41 [2021-12-16 05:48:16,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:16,568 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 297 transitions. [2021-12-16 05:48:16,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.304347826086956) internal successors, (99), 24 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:16,568 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 297 transitions. [2021-12-16 05:48:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-16 05:48:16,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:16,569 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2021-12-16 05:48:16,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:16,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 05:48:16,784 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:16,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:16,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2021-12-16 05:48:16,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:16,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325942023] [2021-12-16 05:48:16,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:16,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:16,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:16,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325942023] [2021-12-16 05:48:16,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325942023] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:16,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828119101] [2021-12-16 05:48:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:16,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:16,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:16,959 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) [2021-12-16 05:48:16,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 05:48:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:17,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-16 05:48:17,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:17,137 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 [2021-12-16 05:48:17,506 INFO L354 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2021-12-16 05:48:17,506 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 28 treesize of output 14 [2021-12-16 05:48:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:17,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:17,710 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 [2021-12-16 05:48:17,713 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-16 05:48:17,714 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 45 treesize of output 39 [2021-12-16 05:48:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:17,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828119101] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:17,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:17,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 37 [2021-12-16 05:48:17,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446958414] [2021-12-16 05:48:17,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:17,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-16 05:48:17,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-16 05:48:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 05:48:17,836 INFO L87 Difference]: Start difference. First operand 261 states and 297 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:18,300 INFO L93 Difference]: Finished difference Result 270 states and 298 transitions. [2021-12-16 05:48:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-16 05:48:18,300 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 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 [2021-12-16 05:48:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:18,301 INFO L225 Difference]: With dead ends: 270 [2021-12-16 05:48:18,301 INFO L226 Difference]: Without dead ends: 239 [2021-12-16 05:48:18,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=352, Invalid=2404, Unknown=0, NotChecked=0, Total=2756 [2021-12-16 05:48:18,303 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:18,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 283 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 179 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2021-12-16 05:48:18,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-12-16 05:48:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 233. [2021-12-16 05:48:18,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 231 states have (on average 1.1341991341991342) internal successors, (262), 232 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 262 transitions. [2021-12-16 05:48:18,308 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 262 transitions. Word has length 42 [2021-12-16 05:48:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:18,308 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 262 transitions. [2021-12-16 05:48:18,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 262 transitions. [2021-12-16 05:48:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-16 05:48:18,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:18,309 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:18,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:18,523 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,SelfDestructingSolverStorable26 [2021-12-16 05:48:18,523 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:18,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 5 times [2021-12-16 05:48:18,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:18,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545927815] [2021-12-16 05:48:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:18,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:18,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545927815] [2021-12-16 05:48:18,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545927815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775658956] [2021-12-16 05:48:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:48:18,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:18,698 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) [2021-12-16 05:48:18,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 05:48:18,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 05:48:18,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-16 05:48:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:18,791 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:18,792 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 [2021-12-16 05:48:19,057 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:19,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:19,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775658956] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:19,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:19,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2021-12-16 05:48:19,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605175793] [2021-12-16 05:48:19,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:19,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 05:48:19,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 05:48:19,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-12-16 05:48:19,451 INFO L87 Difference]: Start difference. First operand 233 states and 262 transitions. Second operand has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:19,957 INFO L93 Difference]: Finished difference Result 369 states and 409 transitions. [2021-12-16 05:48:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 05:48:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-16 05:48:19,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:19,959 INFO L225 Difference]: With dead ends: 369 [2021-12-16 05:48:19,959 INFO L226 Difference]: Without dead ends: 369 [2021-12-16 05:48:19,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=1645, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 05:48:19,960 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 381 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:19,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 422 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-12-16 05:48:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 303. [2021-12-16 05:48:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 301 states have (on average 1.1461794019933556) internal successors, (345), 302 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 345 transitions. [2021-12-16 05:48:19,969 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 345 transitions. Word has length 43 [2021-12-16 05:48:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:19,969 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 345 transitions. [2021-12-16 05:48:19,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 345 transitions. [2021-12-16 05:48:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-16 05:48:19,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:19,971 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:19,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:20,191 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,SelfDestructingSolverStorable27 [2021-12-16 05:48:20,192 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash -24196359, now seen corresponding path program 6 times [2021-12-16 05:48:20,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444781095] [2021-12-16 05:48:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:20,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:20,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:20,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444781095] [2021-12-16 05:48:20,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444781095] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:20,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956555058] [2021-12-16 05:48:20,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 05:48:20,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:20,405 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) [2021-12-16 05:48:20,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 05:48:20,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 05:48:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:20,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-16 05:48:20,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:20,516 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:20,516 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 [2021-12-16 05:48:20,718 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 [2021-12-16 05:48:23,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:23,658 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-16 05:48:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 24 refuted. 5 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:23,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:24,055 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 [2021-12-16 05:48:24,059 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 [2021-12-16 05:48:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:24,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956555058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:24,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:24,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 45 [2021-12-16 05:48:24,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920626920] [2021-12-16 05:48:24,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:24,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-16 05:48:24,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:24,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-16 05:48:24,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1814, Unknown=1, NotChecked=0, Total=1980 [2021-12-16 05:48:24,444 INFO L87 Difference]: Start difference. First operand 303 states and 345 transitions. Second operand has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:29,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:29,285 INFO L93 Difference]: Finished difference Result 415 states and 463 transitions. [2021-12-16 05:48:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 05:48:29,286 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-16 05:48:29,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:29,287 INFO L225 Difference]: With dead ends: 415 [2021-12-16 05:48:29,288 INFO L226 Difference]: Without dead ends: 382 [2021-12-16 05:48:29,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=440, Invalid=3981, Unknown=1, NotChecked=0, Total=4422 [2021-12-16 05:48:29,290 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 160 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:29,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 669 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 392 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2021-12-16 05:48:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-16 05:48:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 357. [2021-12-16 05:48:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 355 states have (on average 1.1408450704225352) internal successors, (405), 356 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:29,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 405 transitions. [2021-12-16 05:48:29,297 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 405 transitions. Word has length 48 [2021-12-16 05:48:29,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:29,297 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 405 transitions. [2021-12-16 05:48:29,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8) internal successors, (126), 45 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:29,297 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 405 transitions. [2021-12-16 05:48:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-16 05:48:29,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:29,298 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:29,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:29,522 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,SelfDestructingSolverStorable28 [2021-12-16 05:48:29,522 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:29,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:29,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2021-12-16 05:48:29,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:29,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754042231] [2021-12-16 05:48:29,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:29,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:30,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:30,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754042231] [2021-12-16 05:48:30,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754042231] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:30,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746979145] [2021-12-16 05:48:30,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:48:30,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:30,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:30,184 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) [2021-12-16 05:48:30,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 05:48:30,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:48:30,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-16 05:48:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:30,292 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:30,292 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 [2021-12-16 05:48:30,305 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 [2021-12-16 05:48:30,559 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 13 treesize of output 9 [2021-12-16 05:48:30,608 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 16 treesize of output 18 [2021-12-16 05:48:31,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 05:48:31,006 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-16 05:48:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:31,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:31,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:31,656 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 21 treesize of output 22 [2021-12-16 05:48:31,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:31,663 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 33 treesize of output 33 [2021-12-16 05:48:31,668 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 9 treesize of output 7 [2021-12-16 05:48:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:32,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746979145] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:32,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:32,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2021-12-16 05:48:32,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270968686] [2021-12-16 05:48:32,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:32,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-16 05:48:32,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:32,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-16 05:48:32,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2564, Unknown=28, NotChecked=0, Total=2756 [2021-12-16 05:48:32,176 INFO L87 Difference]: Start difference. First operand 357 states and 405 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:33,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:33,931 INFO L93 Difference]: Finished difference Result 589 states and 661 transitions. [2021-12-16 05:48:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-16 05:48:33,935 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-12-16 05:48:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:33,937 INFO L225 Difference]: With dead ends: 589 [2021-12-16 05:48:33,937 INFO L226 Difference]: Without dead ends: 562 [2021-12-16 05:48:33,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=623, Invalid=7359, Unknown=28, NotChecked=0, Total=8010 [2021-12-16 05:48:33,940 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 179 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 461 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:33,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 967 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 601 Invalid, 0 Unknown, 461 Unchecked, 0.3s Time] [2021-12-16 05:48:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-16 05:48:33,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 464. [2021-12-16 05:48:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 462 states have (on average 1.1428571428571428) internal successors, (528), 463 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 528 transitions. [2021-12-16 05:48:33,951 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 528 transitions. Word has length 49 [2021-12-16 05:48:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:33,951 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 528 transitions. [2021-12-16 05:48:33,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 528 transitions. [2021-12-16 05:48:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-16 05:48:33,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:33,952 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2021-12-16 05:48:33,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:34,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:34,175 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:34,176 INFO L85 PathProgramCache]: Analyzing trace with hash -839474363, now seen corresponding path program 2 times [2021-12-16 05:48:34,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:34,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571242517] [2021-12-16 05:48:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:34,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 05:48:34,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571242517] [2021-12-16 05:48:34,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571242517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432730154] [2021-12-16 05:48:34,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:34,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:34,627 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) [2021-12-16 05:48:34,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 05:48:34,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:34,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:34,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-16 05:48:34,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:34,779 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 [2021-12-16 05:48:35,517 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:35,517 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 20 treesize of output 20 [2021-12-16 05:48:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:35,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:36,372 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 13 [2021-12-16 05:48:36,376 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 26 treesize of output 22 [2021-12-16 05:48:36,378 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 35 treesize of output 27 [2021-12-16 05:48:36,428 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:36,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432730154] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:36,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:36,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 46 [2021-12-16 05:48:36,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505305781] [2021-12-16 05:48:36,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:36,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-16 05:48:36,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-16 05:48:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1924, Unknown=0, NotChecked=0, Total=2070 [2021-12-16 05:48:36,430 INFO L87 Difference]: Start difference. First operand 464 states and 528 transitions. Second operand has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 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) [2021-12-16 05:48:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:38,397 INFO L93 Difference]: Finished difference Result 569 states and 639 transitions. [2021-12-16 05:48:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-16 05:48:38,397 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 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) Word has length 51 [2021-12-16 05:48:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:38,399 INFO L225 Difference]: With dead ends: 569 [2021-12-16 05:48:38,399 INFO L226 Difference]: Without dead ends: 534 [2021-12-16 05:48:38,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=509, Invalid=5811, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 05:48:38,402 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 217 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:38,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 720 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 545 Invalid, 0 Unknown, 390 Unchecked, 0.3s Time] [2021-12-16 05:48:38,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-16 05:48:38,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 363. [2021-12-16 05:48:38,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 361 states have (on average 1.1357340720221607) internal successors, (410), 362 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 410 transitions. [2021-12-16 05:48:38,410 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 410 transitions. Word has length 51 [2021-12-16 05:48:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:38,410 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 410 transitions. [2021-12-16 05:48:38,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.652173913043478) internal successors, (122), 46 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) [2021-12-16 05:48:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 410 transitions. [2021-12-16 05:48:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-16 05:48:38,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:38,412 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:38,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-16 05:48:38,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:38,631 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:38,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2015974442, now seen corresponding path program 7 times [2021-12-16 05:48:38,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:38,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172226427] [2021-12-16 05:48:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:38,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:38,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:38,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172226427] [2021-12-16 05:48:38,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172226427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:38,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492312314] [2021-12-16 05:48:38,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 05:48:38,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:38,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:38,874 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) [2021-12-16 05:48:38,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 05:48:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:38,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-16 05:48:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:39,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:39,514 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 [2021-12-16 05:48:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:39,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492312314] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:39,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:39,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2021-12-16 05:48:39,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962280840] [2021-12-16 05:48:39,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:39,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 05:48:39,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 05:48:39,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 05:48:39,561 INFO L87 Difference]: Start difference. First operand 363 states and 410 transitions. Second operand has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:40,136 INFO L93 Difference]: Finished difference Result 694 states and 777 transitions. [2021-12-16 05:48:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 05:48:40,136 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-16 05:48:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:40,138 INFO L225 Difference]: With dead ends: 694 [2021-12-16 05:48:40,139 INFO L226 Difference]: Without dead ends: 694 [2021-12-16 05:48:40,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=487, Invalid=2063, Unknown=0, NotChecked=0, Total=2550 [2021-12-16 05:48:40,141 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 388 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:40,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 466 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 05:48:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-12-16 05:48:40,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 473. [2021-12-16 05:48:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 471 states have (on average 1.148619957537155) internal successors, (541), 472 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 541 transitions. [2021-12-16 05:48:40,153 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 541 transitions. Word has length 52 [2021-12-16 05:48:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:40,154 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 541 transitions. [2021-12-16 05:48:40,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 541 transitions. [2021-12-16 05:48:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-16 05:48:40,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:40,155 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:40,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:40,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:40,371 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:40,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 5 times [2021-12-16 05:48:40,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:40,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214655601] [2021-12-16 05:48:40,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:40,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:40,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214655601] [2021-12-16 05:48:40,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214655601] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:40,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664167624] [2021-12-16 05:48:40,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:48:40,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:40,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:40,536 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) [2021-12-16 05:48:40,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 05:48:40,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-16 05:48:40,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:40,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-16 05:48:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:40,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:41,127 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 21 treesize of output 17 [2021-12-16 05:48:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:41,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664167624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:41,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:41,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 28 [2021-12-16 05:48:41,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772556181] [2021-12-16 05:48:41,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:41,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-16 05:48:41,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-16 05:48:41,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2021-12-16 05:48:41,284 INFO L87 Difference]: Start difference. First operand 473 states and 541 transitions. Second operand has 29 states, 28 states have (on average 4.535714285714286) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:41,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:41,721 INFO L93 Difference]: Finished difference Result 638 states and 719 transitions. [2021-12-16 05:48:41,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-16 05:48:41,721 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.535714285714286) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-16 05:48:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:41,723 INFO L225 Difference]: With dead ends: 638 [2021-12-16 05:48:41,723 INFO L226 Difference]: Without dead ends: 638 [2021-12-16 05:48:41,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 05:48:41,724 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 325 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:41,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 754 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:41,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-12-16 05:48:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 536. [2021-12-16 05:48:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 534 states have (on average 1.151685393258427) internal successors, (615), 535 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 615 transitions. [2021-12-16 05:48:41,734 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 615 transitions. Word has length 53 [2021-12-16 05:48:41,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:41,735 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 615 transitions. [2021-12-16 05:48:41,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.535714285714286) internal successors, (127), 29 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 615 transitions. [2021-12-16 05:48:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-16 05:48:41,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:41,736 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:41,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:41,951 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,SelfDestructingSolverStorable32 [2021-12-16 05:48:41,951 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:41,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:41,952 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 8 times [2021-12-16 05:48:41,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:41,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769382263] [2021-12-16 05:48:41,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:41,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:42,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:42,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769382263] [2021-12-16 05:48:42,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769382263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:42,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104256804] [2021-12-16 05:48:42,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 05:48:42,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:42,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:42,210 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) [2021-12-16 05:48:42,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 05:48:42,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 05:48:42,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:42,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-16 05:48:42,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:42,412 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 [2021-12-16 05:48:43,266 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:43,267 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 20 treesize of output 20 [2021-12-16 05:48:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:43,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:44,198 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 13 [2021-12-16 05:48:44,202 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 26 treesize of output 22 [2021-12-16 05:48:44,206 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 35 treesize of output 27 [2021-12-16 05:48:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:44,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104256804] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:44,272 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:44,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 52 [2021-12-16 05:48:44,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591615859] [2021-12-16 05:48:44,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:44,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-16 05:48:44,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:44,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-16 05:48:44,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2463, Unknown=0, NotChecked=0, Total=2652 [2021-12-16 05:48:44,282 INFO L87 Difference]: Start difference. First operand 536 states and 615 transitions. Second operand has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:46,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:46,061 INFO L93 Difference]: Finished difference Result 996 states and 1114 transitions. [2021-12-16 05:48:46,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-16 05:48:46,061 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-16 05:48:46,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:46,064 INFO L225 Difference]: With dead ends: 996 [2021-12-16 05:48:46,064 INFO L226 Difference]: Without dead ends: 954 [2021-12-16 05:48:46,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=470, Invalid=5692, Unknown=0, NotChecked=0, Total=6162 [2021-12-16 05:48:46,065 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 417 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:46,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1530 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 969 Invalid, 0 Unknown, 427 Unchecked, 0.4s Time] [2021-12-16 05:48:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-12-16 05:48:46,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 656. [2021-12-16 05:48:46,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 654 states have (on average 1.146788990825688) internal successors, (750), 655 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 750 transitions. [2021-12-16 05:48:46,094 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 750 transitions. Word has length 57 [2021-12-16 05:48:46,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:46,094 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 750 transitions. [2021-12-16 05:48:46,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 750 transitions. [2021-12-16 05:48:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 05:48:46,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:46,096 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:46,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:46,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:46,309 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 118455529, now seen corresponding path program 3 times [2021-12-16 05:48:46,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407369075] [2021-12-16 05:48:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:46,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:46,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:46,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407369075] [2021-12-16 05:48:46,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407369075] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:46,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149592562] [2021-12-16 05:48:46,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:48:46,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:46,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:46,553 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) [2021-12-16 05:48:46,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 05:48:46,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-16 05:48:46,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:46,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-16 05:48:46,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:46,793 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 [2021-12-16 05:48:46,984 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 [2021-12-16 05:48:46,991 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:46,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:47,105 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 13 [2021-12-16 05:48:47,107 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 26 treesize of output 22 [2021-12-16 05:48:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:47,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149592562] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:47,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:47,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2021-12-16 05:48:47,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569426115] [2021-12-16 05:48:47,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:47,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-16 05:48:47,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-16 05:48:47,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-12-16 05:48:47,256 INFO L87 Difference]: Start difference. First operand 656 states and 750 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:47,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:47,816 INFO L93 Difference]: Finished difference Result 850 states and 951 transitions. [2021-12-16 05:48:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-16 05:48:47,817 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-16 05:48:47,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:47,822 INFO L225 Difference]: With dead ends: 850 [2021-12-16 05:48:47,822 INFO L226 Difference]: Without dead ends: 740 [2021-12-16 05:48:47,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=331, Invalid=2021, Unknown=0, NotChecked=0, Total=2352 [2021-12-16 05:48:47,823 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 227 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:47,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 736 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 631 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2021-12-16 05:48:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-12-16 05:48:47,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 690. [2021-12-16 05:48:47,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 688 states have (on average 1.1438953488372092) internal successors, (787), 689 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 787 transitions. [2021-12-16 05:48:47,834 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 787 transitions. Word has length 60 [2021-12-16 05:48:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:47,834 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 787 transitions. [2021-12-16 05:48:47,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 787 transitions. [2021-12-16 05:48:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-16 05:48:47,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:47,835 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:47,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:48,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:48,058 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:48,059 INFO L85 PathProgramCache]: Analyzing trace with hash -27203543, now seen corresponding path program 4 times [2021-12-16 05:48:48,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:48,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371910564] [2021-12-16 05:48:48,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:48,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:48:48,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:48,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371910564] [2021-12-16 05:48:48,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371910564] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:48,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874318986] [2021-12-16 05:48:48,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 05:48:48,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:48,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:48,228 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) [2021-12-16 05:48:48,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 05:48:48,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 05:48:48,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:48,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-16 05:48:48,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:48,357 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 05:48:48,357 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 [2021-12-16 05:48:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:48:48,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 05:48:48,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874318986] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:48,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:48,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2021-12-16 05:48:48,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965524636] [2021-12-16 05:48:48,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:48,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-16 05:48:48,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-16 05:48:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-12-16 05:48:48,859 INFO L87 Difference]: Start difference. First operand 690 states and 787 transitions. Second operand has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:49,338 INFO L93 Difference]: Finished difference Result 719 states and 801 transitions. [2021-12-16 05:48:49,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 05:48:49,338 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 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 60 [2021-12-16 05:48:49,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:49,340 INFO L225 Difference]: With dead ends: 719 [2021-12-16 05:48:49,340 INFO L226 Difference]: Without dead ends: 648 [2021-12-16 05:48:49,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=525, Invalid=1731, Unknown=0, NotChecked=0, Total=2256 [2021-12-16 05:48:49,340 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 200 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:49,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 368 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 05:48:49,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-12-16 05:48:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 559. [2021-12-16 05:48:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 557 states have (on average 1.1346499102333931) internal successors, (632), 558 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 632 transitions. [2021-12-16 05:48:49,348 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 632 transitions. Word has length 60 [2021-12-16 05:48:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:49,348 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 632 transitions. [2021-12-16 05:48:49,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.65625) internal successors, (117), 32 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 632 transitions. [2021-12-16 05:48:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-16 05:48:49,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:49,350 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:49,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:49,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:49,564 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:49,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:49,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1052245572, now seen corresponding path program 6 times [2021-12-16 05:48:49,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:49,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113010959] [2021-12-16 05:48:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:49,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:49,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:49,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113010959] [2021-12-16 05:48:49,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113010959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:49,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746285710] [2021-12-16 05:48:49,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 05:48:49,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:49,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:49,995 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) [2021-12-16 05:48:49,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-16 05:48:50,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-16 05:48:50,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:50,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-16 05:48:50,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:50,132 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 [2021-12-16 05:48:50,377 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 14 treesize of output 10 [2021-12-16 05:48:50,426 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 17 treesize of output 19 [2021-12-16 05:48:50,637 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 [2021-12-16 05:48:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:50,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:50,873 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_733 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_733) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 3)) 0)) is different from false [2021-12-16 05:48:50,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:50,878 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 [2021-12-16 05:48:50,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 05:48:50,882 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 [2021-12-16 05:48:50,884 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 [2021-12-16 05:48:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:51,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746285710] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:51,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:51,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 44 [2021-12-16 05:48:51,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202339499] [2021-12-16 05:48:51,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:51,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-16 05:48:51,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:51,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-16 05:48:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2021-12-16 05:48:51,102 INFO L87 Difference]: Start difference. First operand 559 states and 632 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:52,249 INFO L93 Difference]: Finished difference Result 957 states and 1064 transitions. [2021-12-16 05:48:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-16 05:48:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-16 05:48:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:52,252 INFO L225 Difference]: With dead ends: 957 [2021-12-16 05:48:52,252 INFO L226 Difference]: Without dead ends: 837 [2021-12-16 05:48:52,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=273, Invalid=4152, Unknown=1, NotChecked=130, Total=4556 [2021-12-16 05:48:52,253 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 187 mSDsluCounter, 2096 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 2190 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:52,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 2190 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1882 Invalid, 0 Unknown, 359 Unchecked, 0.6s Time] [2021-12-16 05:48:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-12-16 05:48:52,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 652. [2021-12-16 05:48:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 650 states have (on average 1.1353846153846154) internal successors, (738), 651 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 738 transitions. [2021-12-16 05:48:52,263 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 738 transitions. Word has length 61 [2021-12-16 05:48:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:52,263 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 738 transitions. [2021-12-16 05:48:52,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 738 transitions. [2021-12-16 05:48:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 05:48:52,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:52,265 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:52,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:52,479 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,SelfDestructingSolverStorable36 [2021-12-16 05:48:52,479 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash 241818559, now seen corresponding path program 7 times [2021-12-16 05:48:52,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:52,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666227562] [2021-12-16 05:48:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:52,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:52,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666227562] [2021-12-16 05:48:52,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666227562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:52,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145898392] [2021-12-16 05:48:52,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 05:48:52,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:52,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:52,679 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) [2021-12-16 05:48:52,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-16 05:48:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-16 05:48:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:52,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 05:48:52,812 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 [2021-12-16 05:48:52,815 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 [2021-12-16 05:48:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:53,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-16 05:48:53,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145898392] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:53,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:53,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 38 [2021-12-16 05:48:53,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50564492] [2021-12-16 05:48:53,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:53,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 05:48:53,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:53,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 05:48:53,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 05:48:53,898 INFO L87 Difference]: Start difference. First operand 652 states and 738 transitions. Second operand has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:54,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:54,957 INFO L93 Difference]: Finished difference Result 890 states and 997 transitions. [2021-12-16 05:48:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-16 05:48:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 states have internal predecessors, (187), 0 states have call successors, (0), 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 65 [2021-12-16 05:48:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:54,960 INFO L225 Difference]: With dead ends: 890 [2021-12-16 05:48:54,960 INFO L226 Difference]: Without dead ends: 890 [2021-12-16 05:48:54,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2021-12-16 05:48:54,961 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 487 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:54,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1117 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 05:48:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-12-16 05:48:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 708. [2021-12-16 05:48:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 706 states have (on average 1.1359773371104815) internal successors, (802), 707 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 802 transitions. [2021-12-16 05:48:54,971 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 802 transitions. Word has length 65 [2021-12-16 05:48:54,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:54,971 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 802 transitions. [2021-12-16 05:48:54,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.921052631578948) internal successors, (187), 39 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 802 transitions. [2021-12-16 05:48:54,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 05:48:54,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:54,973 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:54,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:55,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-16 05:48:55,187 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 9 times [2021-12-16 05:48:55,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:55,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140471721] [2021-12-16 05:48:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:55,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:55,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:55,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140471721] [2021-12-16 05:48:55,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140471721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:55,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857686118] [2021-12-16 05:48:55,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 05:48:55,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:55,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:55,454 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) [2021-12-16 05:48:55,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-16 05:48:55,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-16 05:48:55,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 05:48:55,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 80 conjunts are in the unsatisfiable core [2021-12-16 05:48:55,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 05:48:55,745 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 [2021-12-16 05:48:55,932 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 [2021-12-16 05:48:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:55,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 05:48:56,069 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 13 [2021-12-16 05:48:56,071 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 26 treesize of output 22 [2021-12-16 05:48:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 05:48:56,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857686118] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 05:48:56,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 05:48:56,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2021-12-16 05:48:56,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702643630] [2021-12-16 05:48:56,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 05:48:56,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-16 05:48:56,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 05:48:56,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-16 05:48:56,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2021-12-16 05:48:56,211 INFO L87 Difference]: Start difference. First operand 708 states and 802 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 05:48:57,373 INFO L93 Difference]: Finished difference Result 1307 states and 1464 transitions. [2021-12-16 05:48:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-16 05:48:57,373 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-16 05:48:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 05:48:57,376 INFO L225 Difference]: With dead ends: 1307 [2021-12-16 05:48:57,376 INFO L226 Difference]: Without dead ends: 1256 [2021-12-16 05:48:57,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=461, Invalid=4095, Unknown=0, NotChecked=0, Total=4556 [2021-12-16 05:48:57,377 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 286 mSDsluCounter, 1926 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 2028 SdHoareTripleChecker+Invalid, 1654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 05:48:57,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 2028 Invalid, 1654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1504 Invalid, 0 Unknown, 104 Unchecked, 0.5s Time] [2021-12-16 05:48:57,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-12-16 05:48:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 772. [2021-12-16 05:48:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 770 states have (on average 1.135064935064935) internal successors, (874), 771 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:57,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 874 transitions. [2021-12-16 05:48:57,389 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 874 transitions. Word has length 66 [2021-12-16 05:48:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 05:48:57,389 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 874 transitions. [2021-12-16 05:48:57,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 05:48:57,390 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 874 transitions. [2021-12-16 05:48:57,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 05:48:57,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 05:48:57,391 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 05:48:57,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-16 05:48:57,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-16 05:48:57,615 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 9 more)] === [2021-12-16 05:48:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 05:48:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1915377493, now seen corresponding path program 5 times [2021-12-16 05:48:57,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 05:48:57,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866045904] [2021-12-16 05:48:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 05:48:57,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 05:48:57,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 05:48:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 98 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 05:48:57,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 05:48:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866045904] [2021-12-16 05:48:57,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866045904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 05:48:57,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486796370] [2021-12-16 05:48:57,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 05:48:57,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 05:48:57,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 05:48:57,884 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) [2021-12-16 05:48:57,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process