./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array26_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array26_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:44:01,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:44:01,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:44:01,502 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:44:01,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:44:01,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:44:01,506 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:44:01,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:44:01,509 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:44:01,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:44:01,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:44:01,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:44:01,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:44:01,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:44:01,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:44:01,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:44:01,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:44:01,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:44:01,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:44:01,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:44:01,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:44:01,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:44:01,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:44:01,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:44:01,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:44:01,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:44:01,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:44:01,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:44:01,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:44:01,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:44:01,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:44:01,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:44:01,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:44:01,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:44:01,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:44:01,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:44:01,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:44:01,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:44:01,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:44:01,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:44:01,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:44:01,546 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:44:01,569 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:44:01,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:44:01,569 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:44:01,570 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:44:01,570 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:44:01,570 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:44:01,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:44:01,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:44:01,571 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:44:01,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:44:01,572 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:44:01,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:44:01,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:44:01,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:44:01,573 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:44:01,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:44:01,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:44:01,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:44:01,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:44:01,573 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:44:01,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:44:01,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:44:01,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:44:01,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:44:01,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:44:01,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:44:01,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:44:01,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:44:01,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:44:01,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:44:01,575 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:44:01,575 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:44:01,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:44:01,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:44:01,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2021-12-17 00:44:01,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:44:01,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:44:01,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:44:01,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:44:01,793 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:44:01,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array26_pattern.c [2021-12-17 00:44:01,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869cbc8a5/c1f2c6642321461da1ccc6807692f167/FLAG8f3b43a30 [2021-12-17 00:44:02,237 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:44:02,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c [2021-12-17 00:44:02,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869cbc8a5/c1f2c6642321461da1ccc6807692f167/FLAG8f3b43a30 [2021-12-17 00:44:02,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/869cbc8a5/c1f2c6642321461da1ccc6807692f167 [2021-12-17 00:44:02,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:44:02,262 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:44:02,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:44:02,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:44:02,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:44:02,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a621af5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02, skipping insertion in model container [2021-12-17 00:44:02,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:44:02,282 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:44:02,416 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-12-17 00:44:02,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:44:02,441 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:44:02,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-12-17 00:44:02,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:44:02,475 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:44:02,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02 WrapperNode [2021-12-17 00:44:02,476 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:44:02,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:44:02,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:44:02,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:44:02,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,509 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-12-17 00:44:02,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:44:02,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:44:02,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:44:02,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:44:02,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:44:02,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:44:02,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:44:02,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:44:02,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (1/1) ... [2021-12-17 00:44:02,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:44:02,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:44:02,568 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) [2021-12-17 00:44:02,576 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 [2021-12-17 00:44:02,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:44:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:44:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:44:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:44:02,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:44:02,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:44:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:44:02,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:44:02,647 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:44:02,648 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:44:02,762 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:44:02,766 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:44:02,766 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 00:44:02,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:44:02 BoogieIcfgContainer [2021-12-17 00:44:02,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:44:02,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:44:02,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:44:02,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:44:02,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:44:02" (1/3) ... [2021-12-17 00:44:02,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110b516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:44:02, skipping insertion in model container [2021-12-17 00:44:02,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:44:02" (2/3) ... [2021-12-17 00:44:02,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@110b516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:44:02, skipping insertion in model container [2021-12-17 00:44:02,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:44:02" (3/3) ... [2021-12-17 00:44:02,778 INFO L111 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2021-12-17 00:44:02,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:44:02,781 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:44:02,811 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:44:02,827 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:44:02,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:44:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 00:44:02,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:44:02,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:44:02,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:44:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:44:02,846 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-12-17 00:44:02,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:44:02,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432019886] [2021-12-17 00:44:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:02,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:44:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:44:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:44:03,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:44:03,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432019886] [2021-12-17 00:44:03,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432019886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:44:03,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:44:03,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:44:03,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950481745] [2021-12-17 00:44:03,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:44:03,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:44:03,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:44:03,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:44:03,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:44:03,030 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-12-17 00:44:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:44:03,041 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-12-17 00:44:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:44:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2021-12-17 00:44:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:44:03,048 INFO L225 Difference]: With dead ends: 43 [2021-12-17 00:44:03,048 INFO L226 Difference]: Without dead ends: 19 [2021-12-17 00:44:03,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:44:03,054 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:44:03,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:44:03,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-17 00:44:03,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-17 00:44:03,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-12-17 00:44:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-17 00:44:03,075 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-12-17 00:44:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:44:03,075 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-17 00:44:03,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-12-17 00:44:03,076 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-17 00:44:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 00:44:03,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:44:03,076 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:44:03,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:44:03,077 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:44:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:44:03,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-12-17 00:44:03,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:44:03,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84153379] [2021-12-17 00:44:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:03,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:44:03,090 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:44:03,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287738925] [2021-12-17 00:44:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:03,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:03,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:44:03,098 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) [2021-12-17 00:44:03,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:44:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:44:03,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 00:44:03,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:44:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:44:03,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:44:03,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:44:03,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84153379] [2021-12-17 00:44:03,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:44:03,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287738925] [2021-12-17 00:44:03,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287738925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:44:03,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:44:03,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:44:03,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553418402] [2021-12-17 00:44:03,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:44:03,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:44:03,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:44:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:44:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:44:03,196 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:03,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:44:03,211 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-12-17 00:44:03,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:44:03,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 00:44:03,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:44:03,212 INFO L225 Difference]: With dead ends: 26 [2021-12-17 00:44:03,212 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 00:44:03,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:44:03,213 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:44:03,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:44:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 00:44:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-17 00:44:03,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:03,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-12-17 00:44:03,217 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-12-17 00:44:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:44:03,217 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-12-17 00:44:03,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:03,218 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-12-17 00:44:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 00:44:03,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:44:03,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:44:03,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:44:03,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:03,435 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:44:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:44:03,436 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-12-17 00:44:03,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:44:03,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168745843] [2021-12-17 00:44:03,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:03,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:44:03,449 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:44:03,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966527611] [2021-12-17 00:44:03,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:03,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:03,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:44:03,451 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) [2021-12-17 00:44:03,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:44:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:44:03,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:44:03,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:44:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:44:03,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:44:03,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:44:03,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168745843] [2021-12-17 00:44:03,533 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:44:03,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966527611] [2021-12-17 00:44:03,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966527611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:44:03,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:44:03,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:44:03,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252625843] [2021-12-17 00:44:03,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:44:03,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:44:03,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:44:03,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:44:03,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:44:03,536 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:44:03,583 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-12-17 00:44:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:44:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-17 00:44:03,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:44:03,584 INFO L225 Difference]: With dead ends: 54 [2021-12-17 00:44:03,585 INFO L226 Difference]: Without dead ends: 34 [2021-12-17 00:44:03,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:44:03,586 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:44:03,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:44:03,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-17 00:44:03,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-12-17 00:44:03,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:03,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-12-17 00:44:03,590 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 15 [2021-12-17 00:44:03,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:44:03,590 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-12-17 00:44:03,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:03,591 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-12-17 00:44:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 00:44:03,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:44:03,591 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:44:03,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:44:03,810 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,SelfDestructingSolverStorable2 [2021-12-17 00:44:03,810 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:44:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:44:03,811 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-12-17 00:44:03,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:44:03,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984629417] [2021-12-17 00:44:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:03,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:44:03,818 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:44:03,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395991556] [2021-12-17 00:44:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:03,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:03,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:44:03,819 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) [2021-12-17 00:44:03,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:44:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:44:03,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:44:03,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:44:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:44:03,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:44:03,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:44:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984629417] [2021-12-17 00:44:03,888 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:44:03,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395991556] [2021-12-17 00:44:03,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395991556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:44:03,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:44:03,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:44:03,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238395944] [2021-12-17 00:44:03,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:44:03,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:44:03,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:44:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:44:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:44:03,890 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:03,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:44:03,928 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2021-12-17 00:44:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:44:03,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-12-17 00:44:03,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:44:03,929 INFO L225 Difference]: With dead ends: 54 [2021-12-17 00:44:03,929 INFO L226 Difference]: Without dead ends: 36 [2021-12-17 00:44:03,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:44:03,930 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:44:03,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 17 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:44:03,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-17 00:44:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-12-17 00:44:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2021-12-17 00:44:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-12-17 00:44:03,934 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 18 [2021-12-17 00:44:03,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:44:03,934 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-12-17 00:44:03,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-12-17 00:44:03,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 00:44:03,935 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:44:03,940 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] [2021-12-17 00:44:03,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:44:04,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:04,160 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:44:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:44:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-12-17 00:44:04,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:44:04,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059308053] [2021-12-17 00:44:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:04,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:44:04,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:44:04,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308323209] [2021-12-17 00:44:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:04,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:04,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:44:04,174 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) [2021-12-17 00:44:04,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:44:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:44:04,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:44:04,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:44:04,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:44:04,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:44:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:44:04,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:44:04,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059308053] [2021-12-17 00:44:04,330 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:44:04,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308323209] [2021-12-17 00:44:04,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308323209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:44:04,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:44:04,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-12-17 00:44:04,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243140104] [2021-12-17 00:44:04,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:44:04,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 00:44:04,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:44:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 00:44:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:44:04,332 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:04,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:44:04,441 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2021-12-17 00:44:04,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:44:04,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-17 00:44:04,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:44:04,442 INFO L225 Difference]: With dead ends: 65 [2021-12-17 00:44:04,442 INFO L226 Difference]: Without dead ends: 45 [2021-12-17 00:44:04,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:44:04,443 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 112 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:44:04,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 26 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:44:04,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-17 00:44:04,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-12-17 00:44:04,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 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) [2021-12-17 00:44:04,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-17 00:44:04,447 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 21 [2021-12-17 00:44:04,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:44:04,448 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-17 00:44:04,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:04,448 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-17 00:44:04,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 00:44:04,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:44:04,449 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:44:04,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:44:04,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:04,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:44:04,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:44:04,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1610723178, now seen corresponding path program 1 times [2021-12-17 00:44:04,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:44:04,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312358366] [2021-12-17 00:44:04,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:04,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:44:04,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:44:04,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804751942] [2021-12-17 00:44:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:04,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:04,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:44:04,691 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) [2021-12-17 00:44:04,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:44:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:44:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:44:04,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:44:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:44:04,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:44:04,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:44:04,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:44:04,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312358366] [2021-12-17 00:44:04,898 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:44:04,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804751942] [2021-12-17 00:44:04,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804751942] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:44:04,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:44:04,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-17 00:44:04,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686349142] [2021-12-17 00:44:04,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:44:04,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:44:04,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:44:04,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:44:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:44:04,902 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:05,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:44:05,102 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2021-12-17 00:44:05,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 00:44:05,103 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-17 00:44:05,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:44:05,103 INFO L225 Difference]: With dead ends: 113 [2021-12-17 00:44:05,103 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 00:44:05,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:44:05,104 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:44:05,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 47 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:44:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 00:44:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2021-12-17 00:44:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 66 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:05,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2021-12-17 00:44:05,110 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 27 [2021-12-17 00:44:05,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:44:05,111 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2021-12-17 00:44:05,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:44:05,111 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2021-12-17 00:44:05,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 00:44:05,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:44:05,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:44:05,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:44:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:05,328 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:44:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:44:05,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 1 times [2021-12-17 00:44:05,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:44:05,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821437511] [2021-12-17 00:44:05,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:05,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:44:05,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:44:05,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973782740] [2021-12-17 00:44:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:44:05,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:44:05,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:44:05,357 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) [2021-12-17 00:44:05,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:44:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:44:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-17 00:44:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:44:05,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:44:05,683 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 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-17 00:44:05,691 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 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-17 00:44:05,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 74 [2021-12-17 00:44:05,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:05,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:05,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:44:05,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 97 [2021-12-17 00:44:05,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:05,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2021-12-17 00:44:06,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2021-12-17 00:44:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 88 [2021-12-17 00:44:06,138 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:44:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2021-12-17 00:44:06,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 68 [2021-12-17 00:44:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 103 [2021-12-17 00:44:06,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 00:44:06,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:06,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 29 [2021-12-17 00:44:07,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:44:07,102 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:44:07,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 102 treesize of output 40 [2021-12-17 00:44:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:44:07,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:44:26,452 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 55 treesize of output 51 [2021-12-17 00:44:26,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:44:26,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 58 [2021-12-17 00:44:27,286 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 17 treesize of output 4 [2021-12-17 00:44:27,541 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 19 treesize of output 4 [2021-12-17 00:45:04,470 WARN L227 SmtUtils]: Spent 32.56s on a formula simplification. DAG size of input: 142 DAG size of output: 98 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-12-17 00:45:04,473 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-12-17 00:45:04,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 13251927 treesize of output 12400266 [2021-12-17 00:45:26,553 WARN L227 SmtUtils]: Spent 22.07s on a formula simplification that was a NOOP. DAG size: 3429 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 00:45:26,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:45:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821437511] [2021-12-17 00:45:26,694 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:45:26,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973782740] [2021-12-17 00:45:26,694 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 00:45:26,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:45:26,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-17 00:45:26,694 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-17 00:45:26,695 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-17 00:45:26,699 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 00:45:26,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:26,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:45:26,937 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:26,939 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 00:45:26,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 12:45:26 BoogieIcfgContainer [2021-12-17 00:45:26,949 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 00:45:26,949 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 00:45:26,949 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 00:45:26,949 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 00:45:26,950 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:44:02" (3/4) ... [2021-12-17 00:45:26,951 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 00:45:26,951 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 00:45:26,952 INFO L158 Benchmark]: Toolchain (without parser) took 84690.10ms. Allocated memory was 98.6MB in the beginning and 549.5MB in the end (delta: 450.9MB). Free memory was 68.3MB in the beginning and 388.2MB in the end (delta: -319.8MB). Peak memory consumption was 130.7MB. Max. memory is 16.1GB. [2021-12-17 00:45:26,952 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 98.6MB. Free memory was 55.4MB in the beginning and 55.4MB in the end (delta: 41.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:45:26,952 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.97ms. Allocated memory is still 98.6MB. Free memory was 68.1MB in the beginning and 72.5MB in the end (delta: -4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 00:45:26,953 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.11ms. Allocated memory is still 98.6MB. Free memory was 72.5MB in the beginning and 70.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:45:26,953 INFO L158 Benchmark]: Boogie Preprocessor took 31.44ms. Allocated memory is still 98.6MB. Free memory was 70.8MB in the beginning and 69.5MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 00:45:26,953 INFO L158 Benchmark]: RCFGBuilder took 225.04ms. Allocated memory is still 98.6MB. Free memory was 69.5MB in the beginning and 58.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 00:45:26,953 INFO L158 Benchmark]: TraceAbstraction took 84180.75ms. Allocated memory was 98.6MB in the beginning and 549.5MB in the end (delta: 450.9MB). Free memory was 58.2MB in the beginning and 388.8MB in the end (delta: -330.6MB). Peak memory consumption was 320.2MB. Max. memory is 16.1GB. [2021-12-17 00:45:26,953 INFO L158 Benchmark]: Witness Printer took 2.52ms. Allocated memory is still 549.5MB. Free memory was 388.8MB in the beginning and 388.2MB in the end (delta: 637.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:45:26,955 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 98.6MB. Free memory was 55.4MB in the beginning and 55.4MB in the end (delta: 41.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.97ms. Allocated memory is still 98.6MB. Free memory was 68.1MB in the beginning and 72.5MB in the end (delta: -4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.11ms. Allocated memory is still 98.6MB. Free memory was 72.5MB in the beginning and 70.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.44ms. Allocated memory is still 98.6MB. Free memory was 70.8MB in the beginning and 69.5MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 225.04ms. Allocated memory is still 98.6MB. Free memory was 69.5MB in the beginning and 58.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 84180.75ms. Allocated memory was 98.6MB in the beginning and 549.5MB in the end (delta: 450.9MB). Free memory was 58.2MB in the beginning and 388.8MB in the end (delta: -330.6MB). Peak memory consumption was 320.2MB. Max. memory is 16.1GB. * Witness Printer took 2.52ms. Allocated memory is still 549.5MB. Free memory was 388.8MB in the beginning and 388.2MB in the end (delta: 637.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 34]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L38] signed long long ARR_SIZE ; [L42] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L43] CALL assume_abort_if_not(ARR_SIZE > 1) [L32] COND FALSE !(!cond) [L43] RET assume_abort_if_not(ARR_SIZE > 1) [L45] int array[ARR_SIZE][ARR_SIZE] ; [L47] int row = 0, column = 0, num = -1, value = 1 ; [L48] signed long long sum = 0; [L51] row=0 [L51] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56ad35a361c83538323b9be55683beef9c8271c8f67221c1a0924c8496da71d0 [2021-12-17 00:45:28,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:45:28,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:45:28,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:45:28,963 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:45:28,963 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:45:28,964 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array26_pattern.c [2021-12-17 00:45:29,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e9862e5/ce6ace99f28e481b920c9fdf31fc5fcf/FLAGba64c6a80 [2021-12-17 00:45:29,382 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:45:29,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c [2021-12-17 00:45:29,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e9862e5/ce6ace99f28e481b920c9fdf31fc5fcf/FLAGba64c6a80 [2021-12-17 00:45:29,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e9862e5/ce6ace99f28e481b920c9fdf31fc5fcf [2021-12-17 00:45:29,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:45:29,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:45:29,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:45:29,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:45:29,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:45:29,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52bd5421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29, skipping insertion in model container [2021-12-17 00:45:29,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,418 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:45:29,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:45:29,538 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-12-17 00:45:29,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:45:29,565 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:45:29,586 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array26_pattern.c[1324,1337] [2021-12-17 00:45:29,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:45:29,620 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:45:29,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29 WrapperNode [2021-12-17 00:45:29,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:45:29,621 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:45:29,622 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:45:29,622 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:45:29,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,668 INFO L137 Inliner]: procedures = 18, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2021-12-17 00:45:29,668 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:45:29,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:45:29,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:45:29,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:45:29,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,692 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:45:29,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:45:29,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:45:29,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:45:29,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (1/1) ... [2021-12-17 00:45:29,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:45:29,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:45:29,726 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) [2021-12-17 00:45:29,740 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 [2021-12-17 00:45:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:45:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 00:45:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:45:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-17 00:45:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:45:29,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:45:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:45:29,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-17 00:45:29,791 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:45:29,792 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:45:29,947 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:45:29,951 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:45:29,951 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 00:45:29,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:45:29 BoogieIcfgContainer [2021-12-17 00:45:29,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:45:29,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:45:29,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:45:29,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:45:29,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:45:29" (1/3) ... [2021-12-17 00:45:29,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10856b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:45:29, skipping insertion in model container [2021-12-17 00:45:29,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:45:29" (2/3) ... [2021-12-17 00:45:29,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10856b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:45:29, skipping insertion in model container [2021-12-17 00:45:29,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:45:29" (3/3) ... [2021-12-17 00:45:29,957 INFO L111 eAbstractionObserver]: Analyzing ICFG array26_pattern.c [2021-12-17 00:45:29,960 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:45:29,960 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:45:29,986 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:45:29,990 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:45:29,990 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:45:29,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:30,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 00:45:30,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:30,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:30,002 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-12-17 00:45:30,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:30,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36781970] [2021-12-17 00:45:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:45:30,015 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:30,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:30,017 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:30,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 00:45:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:45:30,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 00:45:30,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:45:30,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:45:30,153 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36781970] [2021-12-17 00:45:30,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36781970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:45:30,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:45:30,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:45:30,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192306185] [2021-12-17 00:45:30,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:45:30,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:45:30,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:30,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:45:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:45:30,185 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-12-17 00:45:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:30,196 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-12-17 00:45:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:45:30,197 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 [2021-12-17 00:45:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:30,205 INFO L225 Difference]: With dead ends: 43 [2021-12-17 00:45:30,206 INFO L226 Difference]: Without dead ends: 19 [2021-12-17 00:45:30,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:45:30,211 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:30,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:45:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-17 00:45:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-17 00:45:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-12-17 00:45:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-12-17 00:45:30,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-12-17 00:45:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:30,232 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-12-17 00:45:30,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2021-12-17 00:45:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-12-17 00:45:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 00:45:30,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:30,234 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:30,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:30,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:30,441 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:30,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:30,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-12-17 00:45:30,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:30,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548488687] [2021-12-17 00:45:30,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:45:30,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:30,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:30,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:30,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 00:45:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:45:30,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:45:30,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:45:30,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:45:30,540 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:30,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548488687] [2021-12-17 00:45:30,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548488687] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:45:30,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:45:30,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:45:30,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321078251] [2021-12-17 00:45:30,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:45:30,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:45:30,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:45:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:45:30,543 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:30,578 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-12-17 00:45:30,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:45:30,579 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 00:45:30,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:30,580 INFO L225 Difference]: With dead ends: 26 [2021-12-17 00:45:30,580 INFO L226 Difference]: Without dead ends: 22 [2021-12-17 00:45:30,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:45:30,581 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:30,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:45:30,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-17 00:45:30,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-17 00:45:30,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:30,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-12-17 00:45:30,585 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-12-17 00:45:30,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:30,585 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-12-17 00:45:30,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:30,585 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-12-17 00:45:30,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 00:45:30,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:30,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:30,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:30,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:30,793 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:30,793 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-12-17 00:45:30,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:30,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362993484] [2021-12-17 00:45:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:45:30,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:30,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:30,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 00:45:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:45:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:45:30,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:45:31,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:45:31,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:31,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362993484] [2021-12-17 00:45:31,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362993484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:45:31,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:45:31,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:45:31,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849822505] [2021-12-17 00:45:31,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:45:31,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:45:31,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:31,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:45:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:45:31,011 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:31,014 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-12-17 00:45:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:45:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-17 00:45:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:31,015 INFO L225 Difference]: With dead ends: 35 [2021-12-17 00:45:31,015 INFO L226 Difference]: Without dead ends: 23 [2021-12-17 00:45:31,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:45:31,016 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:31,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2021-12-17 00:45:31,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-17 00:45:31,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-17 00:45:31,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-12-17 00:45:31,019 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-12-17 00:45:31,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:31,019 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-12-17 00:45:31,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:31,019 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-12-17 00:45:31,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 00:45:31,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:31,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:31,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:31,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:31,221 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:31,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-12-17 00:45:31,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:31,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760855008] [2021-12-17 00:45:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:45:31,222 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:31,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:31,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:31,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 00:45:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:45:31,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:45:31,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:45:31,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:45:31,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:31,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760855008] [2021-12-17 00:45:31,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760855008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:45:31,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:45:31,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:45:31,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030197783] [2021-12-17 00:45:31,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:45:31,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:45:31,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:45:31,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:45:31,387 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:31,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:31,391 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2021-12-17 00:45:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:45:31,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 18 [2021-12-17 00:45:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:31,392 INFO L225 Difference]: With dead ends: 42 [2021-12-17 00:45:31,392 INFO L226 Difference]: Without dead ends: 24 [2021-12-17 00:45:31,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:45:31,393 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:31,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-17 00:45:31,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-17 00:45:31,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-17 00:45:31,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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) [2021-12-17 00:45:31,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-12-17 00:45:31,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 18 [2021-12-17 00:45:31,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:31,397 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-12-17 00:45:31,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:31,397 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-12-17 00:45:31,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 00:45:31,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:31,398 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] [2021-12-17 00:45:31,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:31,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:31,605 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-12-17 00:45:31,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:31,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080792299] [2021-12-17 00:45:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:45:31,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:31,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:31,608 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:31,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 00:45:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:45:31,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-17 00:45:31,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:31,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-17 00:45:31,823 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 16 treesize of output 8 [2021-12-17 00:45:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:45:31,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:32,432 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 47 treesize of output 43 [2021-12-17 00:45:32,436 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 87 treesize of output 83 [2021-12-17 00:45:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:45:35,843 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:35,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080792299] [2021-12-17 00:45:35,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080792299] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:35,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:35,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-17 00:45:35,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071694882] [2021-12-17 00:45:35,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:35,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:45:35,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:45:35,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:45:35,844 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-12-17 00:45:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:38,806 INFO L93 Difference]: Finished difference Result 97 states and 135 transitions. [2021-12-17 00:45:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 00:45:38,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) Word has length 21 [2021-12-17 00:45:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:38,808 INFO L225 Difference]: With dead ends: 97 [2021-12-17 00:45:38,808 INFO L226 Difference]: Without dead ends: 75 [2021-12-17 00:45:38,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-12-17 00:45:38,809 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:38,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 100 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 168 Invalid, 0 Unknown, 49 Unchecked, 1.3s Time] [2021-12-17 00:45:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-17 00:45:38,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 39. [2021-12-17 00:45:38,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.368421052631579) internal successors, (52), 38 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) [2021-12-17 00:45:38,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-12-17 00:45:38,822 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2021-12-17 00:45:38,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:38,823 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-12-17 00:45:38,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-12-17 00:45:38,823 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-12-17 00:45:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-17 00:45:38,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:38,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:38,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:39,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:39,032 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash 331308433, now seen corresponding path program 2 times [2021-12-17 00:45:39,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:39,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425399044] [2021-12-17 00:45:39,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:45:39,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:39,034 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:39,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 00:45:39,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:45:39,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:45:39,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:45:39,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:45:39,380 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:39,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425399044] [2021-12-17 00:45:39,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425399044] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:39,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:39,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:45:39,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317435298] [2021-12-17 00:45:39,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:39,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:45:39,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:45:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:39,383 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-12-17 00:45:39,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:39,427 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2021-12-17 00:45:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:45:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) Word has length 23 [2021-12-17 00:45:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:39,428 INFO L225 Difference]: With dead ends: 67 [2021-12-17 00:45:39,430 INFO L226 Difference]: Without dead ends: 63 [2021-12-17 00:45:39,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:39,430 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:39,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 55 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 41 Unchecked, 0.0s Time] [2021-12-17 00:45:39,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-17 00:45:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-12-17 00:45:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.396551724137931) internal successors, (81), 58 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2021-12-17 00:45:39,443 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 23 [2021-12-17 00:45:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:39,443 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2021-12-17 00:45:39,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 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) [2021-12-17 00:45:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2021-12-17 00:45:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-17 00:45:39,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:39,445 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:39,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:39,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:39,653 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:39,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1617780542, now seen corresponding path program 3 times [2021-12-17 00:45:39,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:39,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296183362] [2021-12-17 00:45:39,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:45:39,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:39,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:39,655 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:39,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 00:45:39,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 00:45:39,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:39,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:45:39,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 00:45:39,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 00:45:39,954 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:39,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1296183362] [2021-12-17 00:45:39,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1296183362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:39,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:39,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:45:39,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453850957] [2021-12-17 00:45:39,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:39,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:45:39,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:45:39,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:39,955 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:40,061 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2021-12-17 00:45:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:45:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-17 00:45:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:40,062 INFO L225 Difference]: With dead ends: 88 [2021-12-17 00:45:40,062 INFO L226 Difference]: Without dead ends: 66 [2021-12-17 00:45:40,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:40,063 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:40,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-12-17 00:45:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-17 00:45:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-17 00:45:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 65 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2021-12-17 00:45:40,070 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 24 [2021-12-17 00:45:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:40,070 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2021-12-17 00:45:40,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2021-12-17 00:45:40,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 00:45:40,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:40,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:40,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-17 00:45:40,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:40,275 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:40,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash 859656881, now seen corresponding path program 4 times [2021-12-17 00:45:40,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:40,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105964463] [2021-12-17 00:45:40,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:45:40,276 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:40,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:40,279 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:40,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 00:45:40,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:45:40,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:45:40,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:45:40,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:45:40,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:40,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105964463] [2021-12-17 00:45:40,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105964463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:40,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:40,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:45:40,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623926993] [2021-12-17 00:45:40,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:40,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:45:40,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:45:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:40,589 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:40,671 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2021-12-17 00:45:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:45:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-17 00:45:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:40,672 INFO L225 Difference]: With dead ends: 106 [2021-12-17 00:45:40,673 INFO L226 Difference]: Without dead ends: 56 [2021-12-17 00:45:40,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:40,673 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:40,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2021-12-17 00:45:40,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-17 00:45:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-17 00:45:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2021-12-17 00:45:40,678 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 27 [2021-12-17 00:45:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:40,679 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2021-12-17 00:45:40,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2021-12-17 00:45:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-17 00:45:40,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:40,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:40,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:40,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:40,887 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:40,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1610723178, now seen corresponding path program 1 times [2021-12-17 00:45:40,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:40,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868963764] [2021-12-17 00:45:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:45:40,887 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:40,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:40,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:40,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 00:45:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:45:40,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:45:40,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:45:41,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:45:41,550 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:41,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868963764] [2021-12-17 00:45:41,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868963764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:41,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:41,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-17 00:45:41,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852358240] [2021-12-17 00:45:41,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:41,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:45:41,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:41,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:45:41,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:45:41,551 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2021-12-17 00:45:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:41,821 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2021-12-17 00:45:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:45:41,821 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) Word has length 27 [2021-12-17 00:45:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:41,822 INFO L225 Difference]: With dead ends: 95 [2021-12-17 00:45:41,822 INFO L226 Difference]: Without dead ends: 79 [2021-12-17 00:45:41,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:45:41,822 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:41,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2021-12-17 00:45:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-17 00:45:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2021-12-17 00:45:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 74 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:41,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2021-12-17 00:45:41,829 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 27 [2021-12-17 00:45:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:41,829 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2021-12-17 00:45:41,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2021-12-17 00:45:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2021-12-17 00:45:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 00:45:41,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:41,830 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:41,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:42,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:42,030 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:42,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -951111360, now seen corresponding path program 2 times [2021-12-17 00:45:42,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:42,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846565342] [2021-12-17 00:45:42,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:45:42,031 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:42,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:42,032 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:42,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 00:45:42,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:45:42,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:45:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:45:42,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 00:45:42,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:42,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846565342] [2021-12-17 00:45:42,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1846565342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:42,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:42,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:45:42,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037641317] [2021-12-17 00:45:42,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:42,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:45:42,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:42,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:45:42,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:42,433 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:42,437 INFO L93 Difference]: Finished difference Result 107 states and 148 transitions. [2021-12-17 00:45:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:45:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-17 00:45:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:42,438 INFO L225 Difference]: With dead ends: 107 [2021-12-17 00:45:42,438 INFO L226 Difference]: Without dead ends: 91 [2021-12-17 00:45:42,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:42,438 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:42,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2021-12-17 00:45:42,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-17 00:45:42,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2021-12-17 00:45:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.4375) internal successors, (115), 80 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 115 transitions. [2021-12-17 00:45:42,456 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 115 transitions. Word has length 28 [2021-12-17 00:45:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:42,456 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 115 transitions. [2021-12-17 00:45:42,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 115 transitions. [2021-12-17 00:45:42,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 00:45:42,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:42,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:42,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:42,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:42,658 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:42,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:42,659 INFO L85 PathProgramCache]: Analyzing trace with hash 715424635, now seen corresponding path program 5 times [2021-12-17 00:45:42,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:42,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1714102562] [2021-12-17 00:45:42,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:45:42,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:42,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:42,660 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:42,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 00:45:42,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:45:42,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:42,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:45:42,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:42,772 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 00:45:42,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:45:42,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:42,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1714102562] [2021-12-17 00:45:42,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1714102562] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:45:42,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:45:42,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:45:42,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745099126] [2021-12-17 00:45:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:45:42,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:45:42,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:45:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:45:42,774 INFO L87 Difference]: Start difference. First operand 81 states and 115 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-12-17 00:45:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:42,899 INFO L93 Difference]: Finished difference Result 146 states and 207 transitions. [2021-12-17 00:45:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:45:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 30 [2021-12-17 00:45:42,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:42,900 INFO L225 Difference]: With dead ends: 146 [2021-12-17 00:45:42,900 INFO L226 Difference]: Without dead ends: 99 [2021-12-17 00:45:42,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:45:42,901 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 28 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:42,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:45:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-17 00:45:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2021-12-17 00:45:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.36) internal successors, (102), 75 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2021-12-17 00:45:42,912 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 30 [2021-12-17 00:45:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:42,912 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2021-12-17 00:45:42,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-12-17 00:45:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2021-12-17 00:45:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 00:45:42,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:42,913 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:42,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-17 00:45:43,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:43,120 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:43,120 INFO L85 PathProgramCache]: Analyzing trace with hash 703357765, now seen corresponding path program 3 times [2021-12-17 00:45:43,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:43,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589939026] [2021-12-17 00:45:43,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:45:43,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:43,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:43,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:43,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 00:45:43,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 00:45:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:43,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:45:43,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:45:43,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 00:45:43,455 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:43,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589939026] [2021-12-17 00:45:43,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589939026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:43,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:43,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:45:43,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981299009] [2021-12-17 00:45:43,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:43,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:45:43,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:45:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:43,456 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:43,466 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2021-12-17 00:45:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:45:43,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2021-12-17 00:45:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:43,467 INFO L225 Difference]: With dead ends: 101 [2021-12-17 00:45:43,467 INFO L226 Difference]: Without dead ends: 97 [2021-12-17 00:45:43,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:43,467 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:43,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 29 Unchecked, 0.0s Time] [2021-12-17 00:45:43,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-17 00:45:43,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-12-17 00:45:43,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.3617021276595744) internal successors, (128), 94 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2021-12-17 00:45:43,473 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 30 [2021-12-17 00:45:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:43,473 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2021-12-17 00:45:43,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2021-12-17 00:45:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 00:45:43,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:43,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:43,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:43,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:43,680 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash 266407946, now seen corresponding path program 4 times [2021-12-17 00:45:43,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1196593064] [2021-12-17 00:45:43,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:45:43,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:43,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:43,682 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:43,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 00:45:43,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:45:43,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:43,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:45:43,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:45:43,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 00:45:44,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:44,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1196593064] [2021-12-17 00:45:44,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1196593064] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:44,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:44,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-12-17 00:45:44,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653681444] [2021-12-17 00:45:44,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:44,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:45:44,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:44,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:45:44,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:45:44,125 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:44,408 INFO L93 Difference]: Finished difference Result 262 states and 363 transitions. [2021-12-17 00:45:44,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 00:45:44,409 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 00:45:44,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:44,410 INFO L225 Difference]: With dead ends: 262 [2021-12-17 00:45:44,410 INFO L226 Difference]: Without dead ends: 209 [2021-12-17 00:45:44,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-12-17 00:45:44,410 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:44,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 89 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 80 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-17 00:45:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-12-17 00:45:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 191. [2021-12-17 00:45:44,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.3473684210526315) internal successors, (256), 190 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 256 transitions. [2021-12-17 00:45:44,420 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 256 transitions. Word has length 31 [2021-12-17 00:45:44,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:44,420 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 256 transitions. [2021-12-17 00:45:44,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:44,420 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 256 transitions. [2021-12-17 00:45:44,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 00:45:44,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:44,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:44,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:44,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:44,629 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:44,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:44,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1572364792, now seen corresponding path program 1 times [2021-12-17 00:45:44,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:44,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [887094997] [2021-12-17 00:45:44,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:45:44,630 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:44,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:44,631 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:44,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 00:45:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:45:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 00:45:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:45:44,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:45:44,904 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:44,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [887094997] [2021-12-17 00:45:44,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [887094997] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:44,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:44,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-12-17 00:45:44,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025452613] [2021-12-17 00:45:44,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:44,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 00:45:44,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 00:45:44,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:45:44,905 INFO L87 Difference]: Start difference. First operand 191 states and 256 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:45,194 INFO L93 Difference]: Finished difference Result 359 states and 485 transitions. [2021-12-17 00:45:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 00:45:45,194 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 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 33 [2021-12-17 00:45:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:45,195 INFO L225 Difference]: With dead ends: 359 [2021-12-17 00:45:45,195 INFO L226 Difference]: Without dead ends: 212 [2021-12-17 00:45:45,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:45:45,196 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:45,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 36 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:45:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-17 00:45:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 161. [2021-12-17 00:45:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.3) internal successors, (208), 160 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:45,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 208 transitions. [2021-12-17 00:45:45,204 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 208 transitions. Word has length 33 [2021-12-17 00:45:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:45,204 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 208 transitions. [2021-12-17 00:45:45,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 208 transitions. [2021-12-17 00:45:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-17 00:45:45,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:45,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:45,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:45,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:45,405 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:45,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:45,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1026825090, now seen corresponding path program 5 times [2021-12-17 00:45:45,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:45,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104644876] [2021-12-17 00:45:45,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:45:45,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:45,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:45,407 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:45,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-17 00:45:45,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-17 00:45:45,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:45:45,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:45:45,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-17 00:45:45,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:45,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104644876] [2021-12-17 00:45:45,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104644876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:45,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:45,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-12-17 00:45:45,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205890925] [2021-12-17 00:45:45,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:45,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:45:45,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:45:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:45:45,615 INFO L87 Difference]: Start difference. First operand 161 states and 208 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:46,290 INFO L93 Difference]: Finished difference Result 511 states and 686 transitions. [2021-12-17 00:45:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:45:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-17 00:45:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:46,292 INFO L225 Difference]: With dead ends: 511 [2021-12-17 00:45:46,292 INFO L226 Difference]: Without dead ends: 393 [2021-12-17 00:45:46,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:45:46,293 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 123 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:46,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 114 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 00:45:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-12-17 00:45:46,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 250. [2021-12-17 00:45:46,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 1.285140562248996) internal successors, (320), 249 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 320 transitions. [2021-12-17 00:45:46,308 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 320 transitions. Word has length 34 [2021-12-17 00:45:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:46,311 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 320 transitions. [2021-12-17 00:45:46,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 320 transitions. [2021-12-17 00:45:46,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 00:45:46,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:46,312 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:46,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-17 00:45:46,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:46,520 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:46,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:46,520 INFO L85 PathProgramCache]: Analyzing trace with hash -863664749, now seen corresponding path program 2 times [2021-12-17 00:45:46,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:46,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4972950] [2021-12-17 00:45:46,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:45:46,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:46,522 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:46,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 00:45:46,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:45:46,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:45:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 00:45:46,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-17 00:45:47,184 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:47,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4972950] [2021-12-17 00:45:47,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4972950] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:47,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:47,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-12-17 00:45:47,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002715424] [2021-12-17 00:45:47,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:47,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 00:45:47,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 00:45:47,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:45:47,185 INFO L87 Difference]: Start difference. First operand 250 states and 320 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:47,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:47,223 INFO L93 Difference]: Finished difference Result 298 states and 380 transitions. [2021-12-17 00:45:47,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 00:45:47,224 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-17 00:45:47,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:47,225 INFO L225 Difference]: With dead ends: 298 [2021-12-17 00:45:47,225 INFO L226 Difference]: Without dead ends: 261 [2021-12-17 00:45:47,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 00:45:47,225 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:47,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 34 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2021-12-17 00:45:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-17 00:45:47,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 228. [2021-12-17 00:45:47,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.2643171806167401) internal successors, (287), 227 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:47,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 287 transitions. [2021-12-17 00:45:47,243 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 287 transitions. Word has length 36 [2021-12-17 00:45:47,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:47,244 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 287 transitions. [2021-12-17 00:45:47,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:47,244 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 287 transitions. [2021-12-17 00:45:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 00:45:47,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:47,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:47,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:47,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:47,453 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:47,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1199579149, now seen corresponding path program 6 times [2021-12-17 00:45:47,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:47,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053920885] [2021-12-17 00:45:47,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:45:47,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:47,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:47,465 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:47,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-17 00:45:47,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-17 00:45:47,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:47,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:45:47,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 00:45:47,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 00:45:48,163 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:48,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053920885] [2021-12-17 00:45:48,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053920885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:48,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:48,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-12-17 00:45:48,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763218482] [2021-12-17 00:45:48,163 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:48,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:45:48,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:48,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:45:48,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:45:48,164 INFO L87 Difference]: Start difference. First operand 228 states and 287 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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) [2021-12-17 00:45:48,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:48,271 INFO L93 Difference]: Finished difference Result 314 states and 398 transitions. [2021-12-17 00:45:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 00:45:48,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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) Word has length 39 [2021-12-17 00:45:48,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:48,275 INFO L225 Difference]: With dead ends: 314 [2021-12-17 00:45:48,275 INFO L226 Difference]: Without dead ends: 284 [2021-12-17 00:45:48,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:45:48,275 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:48,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 64 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2021-12-17 00:45:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-17 00:45:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 254. [2021-12-17 00:45:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.2687747035573123) internal successors, (321), 253 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 321 transitions. [2021-12-17 00:45:48,289 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 321 transitions. Word has length 39 [2021-12-17 00:45:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:48,289 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 321 transitions. [2021-12-17 00:45:48,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 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) [2021-12-17 00:45:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 321 transitions. [2021-12-17 00:45:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-17 00:45:48,290 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:48,290 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:48,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:48,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:48,502 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1097748183, now seen corresponding path program 3 times [2021-12-17 00:45:48,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:48,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247191634] [2021-12-17 00:45:48,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:45:48,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:48,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:48,504 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:48,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 00:45:48,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 00:45:48,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:45:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 00:45:48,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 00:45:48,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:48,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247191634] [2021-12-17 00:45:48,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247191634] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:48,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:48,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:45:48,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689689487] [2021-12-17 00:45:48,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:48,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:45:48,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:45:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:48,943 INFO L87 Difference]: Start difference. First operand 254 states and 321 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:48,963 INFO L93 Difference]: Finished difference Result 270 states and 338 transitions. [2021-12-17 00:45:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:45:48,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-17 00:45:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:48,964 INFO L225 Difference]: With dead ends: 270 [2021-12-17 00:45:48,964 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 00:45:48,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:45:48,965 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:48,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2021-12-17 00:45:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 00:45:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 221. [2021-12-17 00:45:48,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.268181818181818) internal successors, (279), 220 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 279 transitions. [2021-12-17 00:45:48,989 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 279 transitions. Word has length 40 [2021-12-17 00:45:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:48,989 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 279 transitions. [2021-12-17 00:45:48,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 279 transitions. [2021-12-17 00:45:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:45:48,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:48,990 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:48,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:49,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:49,198 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:49,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:49,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1904584303, now seen corresponding path program 7 times [2021-12-17 00:45:49,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:49,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571913119] [2021-12-17 00:45:49,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 00:45:49,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:49,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:49,200 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:49,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-17 00:45:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:45:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:45:49,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-17 00:45:49,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 00:45:49,794 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:49,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571913119] [2021-12-17 00:45:49,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571913119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:49,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:49,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-17 00:45:49,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315321607] [2021-12-17 00:45:49,794 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:49,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:45:49,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:45:49,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:45:49,795 INFO L87 Difference]: Start difference. First operand 221 states and 279 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-12-17 00:45:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:50,133 INFO L93 Difference]: Finished difference Result 443 states and 558 transitions. [2021-12-17 00:45:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 00:45:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) Word has length 41 [2021-12-17 00:45:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:50,134 INFO L225 Difference]: With dead ends: 443 [2021-12-17 00:45:50,134 INFO L226 Difference]: Without dead ends: 272 [2021-12-17 00:45:50,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-12-17 00:45:50,135 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:50,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 81 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 65 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2021-12-17 00:45:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-17 00:45:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 187. [2021-12-17 00:45:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.2473118279569892) internal successors, (232), 186 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:50,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 232 transitions. [2021-12-17 00:45:50,147 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 232 transitions. Word has length 41 [2021-12-17 00:45:50,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:50,147 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 232 transitions. [2021-12-17 00:45:50,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 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) [2021-12-17 00:45:50,148 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 232 transitions. [2021-12-17 00:45:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-17 00:45:50,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:50,148 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:50,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:50,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:50,357 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash 421760628, now seen corresponding path program 4 times [2021-12-17 00:45:50,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:50,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807091054] [2021-12-17 00:45:50,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:45:50,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:50,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:50,362 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:50,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-17 00:45:50,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:45:50,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:50,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:45:50,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 00:45:50,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 00:45:51,004 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:51,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807091054] [2021-12-17 00:45:51,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807091054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:51,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:51,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-12-17 00:45:51,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694754213] [2021-12-17 00:45:51,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:51,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:45:51,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:45:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:45:51,006 INFO L87 Difference]: Start difference. First operand 187 states and 232 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 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) [2021-12-17 00:45:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:51,337 INFO L93 Difference]: Finished difference Result 374 states and 465 transitions. [2021-12-17 00:45:51,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-17 00:45:51,343 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 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) Word has length 41 [2021-12-17 00:45:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:51,344 INFO L225 Difference]: With dead ends: 374 [2021-12-17 00:45:51,344 INFO L226 Difference]: Without dead ends: 367 [2021-12-17 00:45:51,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=245, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:45:51,345 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 63 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:51,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 80 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2021-12-17 00:45:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-17 00:45:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 228. [2021-12-17 00:45:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.2687224669603525) internal successors, (288), 227 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 288 transitions. [2021-12-17 00:45:51,371 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 288 transitions. Word has length 41 [2021-12-17 00:45:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:51,372 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 288 transitions. [2021-12-17 00:45:51,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 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) [2021-12-17 00:45:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 288 transitions. [2021-12-17 00:45:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 00:45:51,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:51,373 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:51,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:51,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:51,584 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:51,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1745295126, now seen corresponding path program 5 times [2021-12-17 00:45:51,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:51,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195975306] [2021-12-17 00:45:51,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:45:51,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:51,586 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:51,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-17 00:45:51,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 00:45:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 00:45:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-17 00:45:51,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:52,125 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-17 00:45:52,125 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:52,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195975306] [2021-12-17 00:45:52,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195975306] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:52,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:52,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-12-17 00:45:52,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141146128] [2021-12-17 00:45:52,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:52,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:45:52,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:45:52,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:45:52,126 INFO L87 Difference]: Start difference. First operand 228 states and 288 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:52,720 INFO L93 Difference]: Finished difference Result 332 states and 414 transitions. [2021-12-17 00:45:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:45:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-17 00:45:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:52,721 INFO L225 Difference]: With dead ends: 332 [2021-12-17 00:45:52,721 INFO L226 Difference]: Without dead ends: 190 [2021-12-17 00:45:52,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2021-12-17 00:45:52,722 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:52,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 56 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 00:45:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-17 00:45:52,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 111. [2021-12-17 00:45:52,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1727272727272726) internal successors, (129), 110 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:52,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 129 transitions. [2021-12-17 00:45:52,730 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 129 transitions. Word has length 43 [2021-12-17 00:45:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:52,730 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 129 transitions. [2021-12-17 00:45:52,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 129 transitions. [2021-12-17 00:45:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-17 00:45:52,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:52,731 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:52,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-17 00:45:52,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:52,932 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:52,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:52,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1984345933, now seen corresponding path program 8 times [2021-12-17 00:45:52,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:52,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348258880] [2021-12-17 00:45:52,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:45:52,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:52,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:52,933 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:52,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-17 00:45:53,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:45:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:53,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:45:53,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 00:45:53,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:45:53,172 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 00:45:53,172 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:45:53,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348258880] [2021-12-17 00:45:53,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348258880] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:45:53,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:45:53,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-17 00:45:53,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386577965] [2021-12-17 00:45:53,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:45:53,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 00:45:53,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:45:53,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 00:45:53,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 00:45:53,173 INFO L87 Difference]: Start difference. First operand 111 states and 129 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:53,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:45:53,362 INFO L93 Difference]: Finished difference Result 292 states and 346 transitions. [2021-12-17 00:45:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:45:53,363 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-17 00:45:53,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:45:53,364 INFO L225 Difference]: With dead ends: 292 [2021-12-17 00:45:53,364 INFO L226 Difference]: Without dead ends: 205 [2021-12-17 00:45:53,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 00:45:53,364 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:45:53,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 58 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 00:45:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-17 00:45:53,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 137. [2021-12-17 00:45:53,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1691176470588236) internal successors, (159), 136 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2021-12-17 00:45:53,375 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 44 [2021-12-17 00:45:53,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:45:53,375 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2021-12-17 00:45:53,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:45:53,375 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2021-12-17 00:45:53,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 00:45:53,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:45:53,376 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:45:53,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-17 00:45:53,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:45:53,585 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:45:53,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:45:53,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 6 times [2021-12-17 00:45:53,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:45:53,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166508180] [2021-12-17 00:45:53,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 00:45:53,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:45:53,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:45:53,587 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:45:53,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-17 00:45:53,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-17 00:45:53,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:45:53,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 00:45:53,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:45:54,020 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 21 treesize of output 17 [2021-12-17 00:45:54,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:54,288 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 34 treesize of output 33 [2021-12-17 00:45:54,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:54,627 INFO L354 Elim1Store]: treesize reduction 65, result has 31.6 percent of original size [2021-12-17 00:45:54,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 53 [2021-12-17 00:45:54,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:55,019 INFO L354 Elim1Store]: treesize reduction 91, result has 23.5 percent of original size [2021-12-17 00:45:55,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 66 [2021-12-17 00:45:56,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:56,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:56,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:56,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:56,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:45:56,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:45:56,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:45:56,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 27 [2021-12-17 00:45:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:45:57,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:46:28,734 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 515 treesize of output 499 [2021-12-17 00:46:33,053 INFO L354 Elim1Store]: treesize reduction 41, result has 53.4 percent of original size [2021-12-17 00:46:33,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30302878491 treesize of output 29598235465 Killed by 15