./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res1.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-fpi/res1.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 f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 21:52:32,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 21:52:32,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 21:52:32,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 21:52:32,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 21:52:32,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 21:52:32,541 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 21:52:32,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 21:52:32,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 21:52:32,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 21:52:32,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 21:52:32,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 21:52:32,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 21:52:32,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 21:52:32,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 21:52:32,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 21:52:32,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 21:52:32,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 21:52:32,561 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 21:52:32,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 21:52:32,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 21:52:32,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 21:52:32,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 21:52:32,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 21:52:32,571 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 21:52:32,573 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 21:52:32,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 21:52:32,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 21:52:32,576 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 21:52:32,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 21:52:32,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 21:52:32,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 21:52:32,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 21:52:32,579 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 21:52:32,580 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 21:52:32,580 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 21:52:32,581 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 21:52:32,581 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 21:52:32,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 21:52:32,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 21:52:32,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 21:52:32,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 21:52:32,596 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 21:52:32,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 21:52:32,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 21:52:32,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 21:52:32,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 21:52:32,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 21:52:32,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 21:52:32,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 21:52:32,604 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 21:52:32,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 21:52:32,605 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 21:52:32,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 21:52:32,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 21:52:32,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 21:52:32,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 21:52:32,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 21:52:32,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 21:52:32,606 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 21:52:32,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 21:52:32,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 21:52:32,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 21:52:32,606 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 21:52:32,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 21:52:32,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 21:52:32,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:52:32,607 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 21:52:32,607 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 21:52:32,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 21:52:32,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 21:52:32,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 21:52:32,609 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 21:52:32,609 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 21:52:32,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 21:52:32,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 21:52:32,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 [2021-12-15 21:52:32,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 21:52:32,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 21:52:32,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 21:52:32,826 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 21:52:32,826 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 21:52:32,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res1.c [2021-12-15 21:52:32,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ce34fe28/c5df48b084dd462296e614c0b467a3e1/FLAGda78f279c [2021-12-15 21:52:33,224 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 21:52:33,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res1.c [2021-12-15 21:52:33,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ce34fe28/c5df48b084dd462296e614c0b467a3e1/FLAGda78f279c [2021-12-15 21:52:33,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ce34fe28/c5df48b084dd462296e614c0b467a3e1 [2021-12-15 21:52:33,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 21:52:33,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 21:52:33,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 21:52:33,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 21:52:33,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 21:52:33,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9ab68e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33, skipping insertion in model container [2021-12-15 21:52:33,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 21:52:33,271 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 21:52:33,405 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-fpi/res1.c[587,600] [2021-12-15 21:52:33,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:52:33,433 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 21:52:33,445 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-fpi/res1.c[587,600] [2021-12-15 21:52:33,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 21:52:33,469 INFO L208 MainTranslator]: Completed translation [2021-12-15 21:52:33,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33 WrapperNode [2021-12-15 21:52:33,470 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 21:52:33,471 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 21:52:33,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 21:52:33,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 21:52:33,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,505 INFO L137 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2021-12-15 21:52:33,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 21:52:33,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 21:52:33,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 21:52:33,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 21:52:33,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 21:52:33,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 21:52:33,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 21:52:33,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 21:52:33,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (1/1) ... [2021-12-15 21:52:33,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 21:52:33,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:52:33,573 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) [2021-12-15 21:52:33,591 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 [2021-12-15 21:52:33,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 21:52:33,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 21:52:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 21:52:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 21:52:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 21:52:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 21:52:33,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 21:52:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 21:52:33,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 21:52:33,662 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 21:52:33,664 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 21:52:33,781 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 21:52:33,785 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 21:52:33,785 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-15 21:52:33,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:52:33 BoogieIcfgContainer [2021-12-15 21:52:33,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 21:52:33,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 21:52:33,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 21:52:33,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 21:52:33,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:52:33" (1/3) ... [2021-12-15 21:52:33,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c13956a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:52:33, skipping insertion in model container [2021-12-15 21:52:33,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:52:33" (2/3) ... [2021-12-15 21:52:33,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c13956a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:52:33, skipping insertion in model container [2021-12-15 21:52:33,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:52:33" (3/3) ... [2021-12-15 21:52:33,792 INFO L111 eAbstractionObserver]: Analyzing ICFG res1.c [2021-12-15 21:52:33,795 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 21:52:33,795 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 21:52:33,821 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 21:52:33,826 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 [2021-12-15 21:52:33,826 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 21:52:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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) [2021-12-15 21:52:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 21:52:33,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:52:33,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:52:33,838 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:52:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:52:33,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2021-12-15 21:52:33,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:52:33,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117592207] [2021-12-15 21:52:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:52:33,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:52:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:52:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:52:33,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:52:33,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117592207] [2021-12-15 21:52:33,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117592207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:52:33,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:52:33,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 21:52:33,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756559257] [2021-12-15 21:52:33,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:52:33,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 21:52:33,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:52:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 21:52:34,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 21:52:34,018 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 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 7.5) internal successors, (15), 2 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) [2021-12-15 21:52:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:52:34,030 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2021-12-15 21:52:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 21:52:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 [2021-12-15 21:52:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:52:34,037 INFO L225 Difference]: With dead ends: 44 [2021-12-15 21:52:34,037 INFO L226 Difference]: Without dead ends: 20 [2021-12-15 21:52:34,039 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 [2021-12-15 21:52:34,044 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 [2021-12-15 21:52:34,045 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] [2021-12-15 21:52:34,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-15 21:52:34,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-15 21:52:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:52:34,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-12-15 21:52:34,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-12-15 21:52:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:52:34,069 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-12-15 21:52:34,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2021-12-15 21:52:34,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-12-15 21:52:34,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-15 21:52:34,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:52:34,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:52:34,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 21:52:34,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:52:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:52:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2021-12-15 21:52:34,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:52:34,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098324437] [2021-12-15 21:52:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:52:34,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:52:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:52:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:52:34,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:52:34,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098324437] [2021-12-15 21:52:34,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098324437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 21:52:34,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 21:52:34,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 21:52:34,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014580936] [2021-12-15 21:52:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 21:52:34,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 21:52:34,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:52:34,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 21:52:34,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:52:34,223 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:52:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:52:34,279 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-12-15 21:52:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 21:52:34,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-15 21:52:34,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:52:34,282 INFO L225 Difference]: With dead ends: 41 [2021-12-15 21:52:34,282 INFO L226 Difference]: Without dead ends: 28 [2021-12-15 21:52:34,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 21:52:34,287 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 21:52:34,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 12 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 21:52:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-15 21:52:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-12-15 21:52:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:52:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-15 21:52:34,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2021-12-15 21:52:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:52:34,301 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-15 21:52:34,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:52:34,304 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-15 21:52:34,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-15 21:52:34,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:52:34,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 21:52:34,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 21:52:34,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:52:34,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:52:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2021-12-15 21:52:34,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:52:34,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832658375] [2021-12-15 21:52:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:52:34,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:52:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:52:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:52:34,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:52:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832658375] [2021-12-15 21:52:34,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832658375] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:52:34,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710572398] [2021-12-15 21:52:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:52:34,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:52:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:52:34,869 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) [2021-12-15 21:52:34,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 21:52:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:52:34,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-15 21:52:34,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:52:35,093 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 [2021-12-15 21:52:35,102 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 14 treesize of output 12 [2021-12-15 21:52:35,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:35,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-15 21:52:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:35,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-12-15 21:52:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:35,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 36 [2021-12-15 21:52:35,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:35,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 50 treesize of output 36 [2021-12-15 21:52:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:35,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 15 [2021-12-15 21:52:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:52:35,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:52:36,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:52:36,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:52:36,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:52:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:52:36,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710572398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:52:36,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:52:36,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2021-12-15 21:52:36,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27859136] [2021-12-15 21:52:36,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:52:36,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-15 21:52:36,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:52:36,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-15 21:52:36,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-12-15 21:52:36,295 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:52:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:52:36,764 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-12-15 21:52:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 21:52:36,765 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-15 21:52:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:52:36,765 INFO L225 Difference]: With dead ends: 36 [2021-12-15 21:52:36,765 INFO L226 Difference]: Without dead ends: 32 [2021-12-15 21:52:36,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-12-15 21:52:36,766 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:52:36,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 99 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2021-12-15 21:52:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-15 21:52:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2021-12-15 21:52:36,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:52:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-12-15 21:52:36,770 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2021-12-15 21:52:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:52:36,770 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-12-15 21:52:36,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 29 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:52:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-12-15 21:52:36,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-15 21:52:36,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:52:36,771 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, 1, 1] [2021-12-15 21:52:36,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 21:52:36,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:52:36,989 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:52:36,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:52:36,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2021-12-15 21:52:36,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:52:36,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466302112] [2021-12-15 21:52:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:52:36,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:52:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:52:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:52:37,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:52:37,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466302112] [2021-12-15 21:52:37,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466302112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:52:37,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678051987] [2021-12-15 21:52:37,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 21:52:37,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:52:37,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:52:37,084 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) [2021-12-15 21:52:37,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 21:52:37,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 21:52:37,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:52:37,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:52:37,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:52:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:52:37,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:52:37,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 21:52:37,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678051987] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:52:37,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:52:37,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 21:52:37,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693653012] [2021-12-15 21:52:37,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:52:37,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:52:37,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:52:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:52:37,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:52:37,231 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-12-15 21:52:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:52:37,323 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-15 21:52:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:52:37,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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 25 [2021-12-15 21:52:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:52:37,324 INFO L225 Difference]: With dead ends: 73 [2021-12-15 21:52:37,324 INFO L226 Difference]: Without dead ends: 40 [2021-12-15 21:52:37,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-15 21:52:37,327 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:52:37,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 29 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:52:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-15 21:52:37,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2021-12-15 21:52:37,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 21:52:37,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-15 21:52:37,330 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2021-12-15 21:52:37,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:52:37,331 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-15 21:52:37,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 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) [2021-12-15 21:52:37,331 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-15 21:52:37,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 21:52:37,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:52:37,332 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, 1, 1] [2021-12-15 21:52:37,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 21:52:37,535 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,SelfDestructingSolverStorable3 [2021-12-15 21:52:37,535 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:52:37,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:52:37,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1796008330, now seen corresponding path program 3 times [2021-12-15 21:52:37,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:52:37,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001281861] [2021-12-15 21:52:37,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:52:37,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:52:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:52:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 21:52:37,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:52:37,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001281861] [2021-12-15 21:52:37,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001281861] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:52:37,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800074085] [2021-12-15 21:52:37,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 21:52:37,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:52:37,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:52:37,638 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) [2021-12-15 21:52:37,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 21:52:37,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 21:52:37,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:52:37,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 21:52:37,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:52:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 21:52:37,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:52:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-15 21:52:37,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800074085] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:52:37,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:52:37,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 21:52:37,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285469419] [2021-12-15 21:52:37,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:52:37,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 21:52:37,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:52:37,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 21:52:37,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 21:52:37,844 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2021-12-15 21:52:37,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 21:52:37,944 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-12-15 21:52:37,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 21:52:37,945 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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 29 [2021-12-15 21:52:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 21:52:37,945 INFO L225 Difference]: With dead ends: 39 [2021-12-15 21:52:37,945 INFO L226 Difference]: Without dead ends: 35 [2021-12-15 21:52:37,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-15 21:52:37,946 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 21:52:37,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 34 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 21:52:37,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-15 21:52:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-12-15 21:52:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2021-12-15 21:52:37,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-12-15 21:52:37,949 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2021-12-15 21:52:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 21:52:37,949 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-12-15 21:52:37,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2021-12-15 21:52:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-12-15 21:52:37,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 21:52:37,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 21:52:37,950 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] [2021-12-15 21:52:37,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 21:52:38,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:52:38,159 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 21:52:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 21:52:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2021-12-15 21:52:38,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 21:52:38,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177859985] [2021-12-15 21:52:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 21:52:38,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 21:52:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 21:52:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:52:39,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 21:52:39,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177859985] [2021-12-15 21:52:39,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177859985] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 21:52:39,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812163363] [2021-12-15 21:52:39,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 21:52:39,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 21:52:39,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 21:52:39,268 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) [2021-12-15 21:52:39,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 21:52:39,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 21:52:39,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 21:52:39,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-15 21:52:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 21:52:39,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 21:52:39,352 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 [2021-12-15 21:52:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-15 21:52:39,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-12-15 21:52:39,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2021-12-15 21:52:39,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 52 [2021-12-15 21:52:39,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:52:39,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:39,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2021-12-15 21:52:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2021-12-15 21:52:40,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 21:52:40,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 64 [2021-12-15 21:52:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2021-12-15 21:52:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 21:52:40,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2021-12-15 21:52:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:52:40,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 21:53:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 21:53:44,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812163363] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 21:53:44,765 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 21:53:44,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 56 [2021-12-15 21:53:44,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811944774] [2021-12-15 21:53:44,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 21:53:44,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-12-15 21:53:44,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 21:53:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-12-15 21:53:44,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=2669, Unknown=23, NotChecked=0, Total=3080 [2021-12-15 21:53:44,767 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 56 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 56 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)