./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_05.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/eureka_05.i -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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:14:33,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:14:33,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:14:33,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:14:33,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:14:33,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:14:33,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:14:33,511 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:14:33,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:14:33,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:14:33,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:14:33,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:14:33,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:14:33,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:14:33,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:14:33,522 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:14:33,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:14:33,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:14:33,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:14:33,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:14:33,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:14:33,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:14:33,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:14:33,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:14:33,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:14:33,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:14:33,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:14:33,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:14:33,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:14:33,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:14:33,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:14:33,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:14:33,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:14:33,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:14:33,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:14:33,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:14:33,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:14:33,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:14:33,555 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:14:33,555 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:14:33,556 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:14:33,557 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:14:33,582 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:14:33,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:14:33,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:14:33,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:14:33,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:14:33,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:14:33,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:14:33,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:14:33,585 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:14:33,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:14:33,585 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:14:33,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:14:33,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:14:33,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:14:33,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:14:33,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:14:33,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:14:33,586 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:14:33,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:14:33,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:14:33,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:14:33,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:14:33,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:14:33,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:14:33,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:14:33,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:14:33,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:14:33,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:14:33,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:14:33,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:14:33,589 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:14:33,589 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:14:33,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:14:33,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:14:33,590 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab [2021-12-21 12:14:33,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:14:33,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:14:33,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:14:33,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:14:33,785 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:14:33,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/eureka_05.i [2021-12-21 12:14:33,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68dc04af6/94a3ccfa17a94b62ae04127472a56548/FLAGa25e29eff [2021-12-21 12:14:34,204 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:14:34,205 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/eureka_05.i [2021-12-21 12:14:34,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68dc04af6/94a3ccfa17a94b62ae04127472a56548/FLAGa25e29eff [2021-12-21 12:14:34,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68dc04af6/94a3ccfa17a94b62ae04127472a56548 [2021-12-21 12:14:34,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:14:34,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:14:34,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:14:34,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:14:34,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:14:34,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,226 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7566d763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34, skipping insertion in model container [2021-12-21 12:14:34,226 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:14:34,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:14:34,399 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/loops/eureka_05.i[810,823] [2021-12-21 12:14:34,416 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:14:34,423 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:14:34,432 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/loops/eureka_05.i[810,823] [2021-12-21 12:14:34,442 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:14:34,451 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:14:34,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34 WrapperNode [2021-12-21 12:14:34,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:14:34,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:14:34,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:14:34,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:14:34,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,485 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2021-12-21 12:14:34,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:14:34,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:14:34,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:14:34,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:14:34,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:14:34,519 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:14:34,519 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:14:34,519 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:14:34,520 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (1/1) ... [2021-12-21 12:14:34,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:14:34,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:34,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:14:34,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:14:34,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:14:34,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:14:34,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 12:14:34,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 12:14:34,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:14:34,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:14:34,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 12:14:34,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 12:14:34,642 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:14:34,644 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:14:34,762 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:14:34,765 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:14:34,766 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-21 12:14:34,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:14:34 BoogieIcfgContainer [2021-12-21 12:14:34,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:14:34,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:14:34,768 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:14:34,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:14:34,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:14:34" (1/3) ... [2021-12-21 12:14:34,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a56b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:14:34, skipping insertion in model container [2021-12-21 12:14:34,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:14:34" (2/3) ... [2021-12-21 12:14:34,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a56b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:14:34, skipping insertion in model container [2021-12-21 12:14:34,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:14:34" (3/3) ... [2021-12-21 12:14:34,772 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2021-12-21 12:14:34,775 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:14:34,775 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:14:34,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:14:34,807 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 [2021-12-21 12:14:34,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:14:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) [2021-12-21 12:14:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-21 12:14:34,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:34,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:34,820 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2015864939, now seen corresponding path program 1 times [2021-12-21 12:14:34,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:34,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448129646] [2021-12-21 12:14:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:34,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:34,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:34,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448129646] [2021-12-21 12:14:34,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448129646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:14:34,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:14:34,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:14:34,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667117044] [2021-12-21 12:14:34,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:14:34,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 12:14:34,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:35,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 12:14:35,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:14:35,017 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:35,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:35,053 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-12-21 12:14:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 12:14:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-21 12:14:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:35,059 INFO L225 Difference]: With dead ends: 42 [2021-12-21 12:14:35,060 INFO L226 Difference]: Without dead ends: 20 [2021-12-21 12:14:35,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 12:14:35,065 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:35,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 39 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:14:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-21 12:14:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-12-21 12:14:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-21 12:14:35,093 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-21 12:14:35,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:35,093 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-21 12:14:35,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-21 12:14:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-21 12:14:35,095 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:35,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:35,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:14:35,096 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:35,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:35,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1565230291, now seen corresponding path program 1 times [2021-12-21 12:14:35,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:35,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147363590] [2021-12-21 12:14:35,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:35,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:35,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:35,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:35,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147363590] [2021-12-21 12:14:35,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147363590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:35,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726723232] [2021-12-21 12:14:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:35,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:35,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:35,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:14:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:35,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 12:14:35,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:35,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:14:35,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726723232] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:35,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:35,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-21 12:14:35,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636775812] [2021-12-21 12:14:35,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:35,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 12:14:35,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:35,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 12:14:35,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:14:35,335 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-12-21 12:14:35,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:35,364 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-12-21 12:14:35,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 12:14:35,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 11 [2021-12-21 12:14:35,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:35,365 INFO L225 Difference]: With dead ends: 45 [2021-12-21 12:14:35,365 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 12:14:35,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:14:35,369 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:35,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:14:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 12:14:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-12-21 12:14:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-12-21 12:14:35,373 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2021-12-21 12:14:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:35,374 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-12-21 12:14:35,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-12-21 12:14:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-12-21 12:14:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-21 12:14:35,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:35,375 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:35,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:35,588 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 [2021-12-21 12:14:35,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:35,588 INFO L85 PathProgramCache]: Analyzing trace with hash -7962739, now seen corresponding path program 2 times [2021-12-21 12:14:35,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:35,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089530274] [2021-12-21 12:14:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:35,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:14:35,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:35,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089530274] [2021-12-21 12:14:35,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089530274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:14:35,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:14:35,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 12:14:35,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20722678] [2021-12-21 12:14:35,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:14:35,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 12:14:35,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 12:14:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:14:35,633 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:35,653 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-12-21 12:14:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 12:14:35,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-21 12:14:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:35,655 INFO L225 Difference]: With dead ends: 38 [2021-12-21 12:14:35,655 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 12:14:35,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 12:14:35,656 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:35,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 30 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:14:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 12:14:35,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-21 12:14:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2021-12-21 12:14:35,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-21 12:14:35,663 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-21 12:14:35,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:35,664 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-21 12:14:35,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:35,664 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-21 12:14:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 12:14:35,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:35,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:35,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:14:35,665 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:35,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1148715813, now seen corresponding path program 1 times [2021-12-21 12:14:35,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:35,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118931351] [2021-12-21 12:14:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:35,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-21 12:14:35,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:35,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118931351] [2021-12-21 12:14:35,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118931351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:14:35,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:14:35,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 12:14:35,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070094865] [2021-12-21 12:14:35,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:14:35,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 12:14:35,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 12:14:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 12:14:35,754 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:35,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:35,781 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-12-21 12:14:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 12:14:35,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-21 12:14:35,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:35,782 INFO L225 Difference]: With dead ends: 47 [2021-12-21 12:14:35,782 INFO L226 Difference]: Without dead ends: 34 [2021-12-21 12:14:35,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 12:14:35,783 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:35,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:14:35,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-21 12:14:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-12-21 12:14:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-12-21 12:14:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-21 12:14:35,788 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-12-21 12:14:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:35,788 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-21 12:14:35,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:35,788 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-21 12:14:35,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 12:14:35,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:35,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:35,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 12:14:35,789 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:35,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:35,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1025080129, now seen corresponding path program 1 times [2021-12-21 12:14:35,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:35,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494584401] [2021-12-21 12:14:35,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:35,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 12:14:35,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494584401] [2021-12-21 12:14:35,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494584401] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426505700] [2021-12-21 12:14:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:35,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:35,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:35,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 12:14:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:35,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 12:14:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:14:36,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 12:14:36,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426505700] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:36,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:36,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2021-12-21 12:14:36,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654157015] [2021-12-21 12:14:36,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:36,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 12:14:36,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 12:14:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-21 12:14:36,059 INFO L87 Difference]: Start difference. First operand 27 states and 31 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) [2021-12-21 12:14:36,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:36,161 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-12-21 12:14:36,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 12:14:36,161 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 24 [2021-12-21 12:14:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:36,162 INFO L225 Difference]: With dead ends: 80 [2021-12-21 12:14:36,162 INFO L226 Difference]: Without dead ends: 64 [2021-12-21 12:14:36,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-21 12:14:36,172 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 74 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:36,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 109 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:14:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-21 12:14:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2021-12-21 12:14:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-21 12:14:36,191 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 24 [2021-12-21 12:14:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:36,192 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-21 12:14:36,192 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) [2021-12-21 12:14:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-21 12:14:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 12:14:36,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:36,192 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:36,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:36,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:36,400 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -2070168231, now seen corresponding path program 2 times [2021-12-21 12:14:36,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303751377] [2021-12-21 12:14:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:36,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 12:14:36,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303751377] [2021-12-21 12:14:36,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303751377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:36,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888508270] [2021-12-21 12:14:36,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:14:36,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:36,485 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:36,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 12:14:36,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:14:36,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:36,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-21 12:14:36,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:36,635 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:14:36,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 12:14:36,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888508270] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:36,705 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:36,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-21 12:14:36,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138559506] [2021-12-21 12:14:36,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:36,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 12:14:36,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:36,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 12:14:36,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:14:36,708 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:36,859 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2021-12-21 12:14:36,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 12:14:36,860 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 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 [2021-12-21 12:14:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:36,861 INFO L225 Difference]: With dead ends: 82 [2021-12-21 12:14:36,861 INFO L226 Difference]: Without dead ends: 66 [2021-12-21 12:14:36,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2021-12-21 12:14:36,862 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 170 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:36,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 76 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:14:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-21 12:14:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2021-12-21 12:14:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.25) internal successors, (75), 60 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) [2021-12-21 12:14:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions. [2021-12-21 12:14:36,869 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 30 [2021-12-21 12:14:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:36,870 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 75 transitions. [2021-12-21 12:14:36,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions. [2021-12-21 12:14:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-21 12:14:36,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:36,871 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:36,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 12:14:37,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:37,089 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:37,089 INFO L85 PathProgramCache]: Analyzing trace with hash 271285953, now seen corresponding path program 3 times [2021-12-21 12:14:37,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:37,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247557837] [2021-12-21 12:14:37,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:37,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 12:14:37,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247557837] [2021-12-21 12:14:37,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247557837] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431731411] [2021-12-21 12:14:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:14:37,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:37,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:37,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 12:14:37,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 12:14:37,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:37,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 12:14:37,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 64 proven. 3 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-21 12:14:37,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 63 proven. 4 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-21 12:14:37,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431731411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:37,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:37,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 12 [2021-12-21 12:14:37,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013512339] [2021-12-21 12:14:37,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:37,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 12:14:37,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:37,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 12:14:37,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-12-21 12:14:37,460 INFO L87 Difference]: Start difference. First operand 61 states and 75 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:37,623 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2021-12-21 12:14:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 12:14:37,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-21 12:14:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:37,624 INFO L225 Difference]: With dead ends: 79 [2021-12-21 12:14:37,624 INFO L226 Difference]: Without dead ends: 72 [2021-12-21 12:14:37,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=378, Unknown=0, NotChecked=0, Total=600 [2021-12-21 12:14:37,625 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:37,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 56 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:14:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-21 12:14:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-12-21 12:14:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.267605633802817) internal successors, (90), 71 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) [2021-12-21 12:14:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2021-12-21 12:14:37,633 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2021-12-21 12:14:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:37,634 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2021-12-21 12:14:37,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2021-12-21 12:14:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-21 12:14:37,635 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:37,635 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:37,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:37,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:37,856 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:37,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1550484977, now seen corresponding path program 4 times [2021-12-21 12:14:37,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:37,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983545819] [2021-12-21 12:14:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:37,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-21 12:14:37,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:37,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983545819] [2021-12-21 12:14:37,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983545819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:37,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942213996] [2021-12-21 12:14:37,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:14:37,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:37,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:37,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:37,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 12:14:38,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:14:38,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 12:14:38,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 12:14:38,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 48 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 12:14:38,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942213996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:38,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:38,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 13 [2021-12-21 12:14:38,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741767426] [2021-12-21 12:14:38,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:38,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 12:14:38,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:38,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 12:14:38,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-21 12:14:38,269 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:14:38,539 INFO L93 Difference]: Finished difference Result 137 states and 179 transitions. [2021-12-21 12:14:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 12:14:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-21 12:14:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:14:38,540 INFO L225 Difference]: With dead ends: 137 [2021-12-21 12:14:38,540 INFO L226 Difference]: Without dead ends: 113 [2021-12-21 12:14:38,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=386, Invalid=804, Unknown=0, NotChecked=0, Total=1190 [2021-12-21 12:14:38,541 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:14:38,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 111 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 12:14:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-12-21 12:14:38,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2021-12-21 12:14:38,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 104 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:38,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 135 transitions. [2021-12-21 12:14:38,553 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 135 transitions. Word has length 66 [2021-12-21 12:14:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:14:38,553 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 135 transitions. [2021-12-21 12:14:38,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:14:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 135 transitions. [2021-12-21 12:14:38,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-21 12:14:38,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:14:38,554 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:14:38,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 12:14:38,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:38,772 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:14:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:14:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 96032675, now seen corresponding path program 5 times [2021-12-21 12:14:38,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:14:38,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846769105] [2021-12-21 12:14:38,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:14:38,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:14:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:14:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-21 12:14:39,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:14:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846769105] [2021-12-21 12:14:39,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846769105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:14:39,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478622236] [2021-12-21 12:14:39,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 12:14:39,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:14:39,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:14:39,077 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:14:39,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 12:14:39,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-12-21 12:14:39,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:14:39,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-21 12:14:39,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:14:39,307 INFO L353 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-21 12:14:39,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2021-12-21 12:14:39,571 INFO L353 Elim1Store]: treesize reduction 147, result has 14.0 percent of original size [2021-12-21 12:14:39,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 42 [2021-12-21 12:14:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 162 proven. 39 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-21 12:14:39,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:14:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 164 proven. 27 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-21 12:14:40,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478622236] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:14:40,840 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:14:40,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22, 18] total 49 [2021-12-21 12:14:40,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819818545] [2021-12-21 12:14:40,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:14:40,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 12:14:40,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:14:40,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 12:14:40,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2135, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 12:14:40,843 INFO L87 Difference]: Start difference. First operand 105 states and 135 transitions. Second operand has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 49 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:22,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:15:22,371 INFO L93 Difference]: Finished difference Result 480 states and 630 transitions. [2021-12-21 12:15:22,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-21 12:15:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 49 states have internal predecessors, (95), 0 states have call successors, (0), 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 69 [2021-12-21 12:15:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:15:22,374 INFO L225 Difference]: With dead ends: 480 [2021-12-21 12:15:22,374 INFO L226 Difference]: Without dead ends: 433 [2021-12-21 12:15:22,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9222 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=4583, Invalid=26214, Unknown=3, NotChecked=0, Total=30800 [2021-12-21 12:15:22,383 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 350 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 770 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 12:15:22,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 207 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1082 Invalid, 0 Unknown, 770 Unchecked, 0.7s Time] [2021-12-21 12:15:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-12-21 12:15:22,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 218. [2021-12-21 12:15:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.336405529953917) internal successors, (290), 217 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 290 transitions. [2021-12-21 12:15:22,426 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 290 transitions. Word has length 69 [2021-12-21 12:15:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:15:22,426 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 290 transitions. [2021-12-21 12:15:22,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 49 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:22,426 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 290 transitions. [2021-12-21 12:15:22,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 12:15:22,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:15:22,428 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:15:22,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 12:15:22,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:22,645 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:15:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:15:22,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1703731131, now seen corresponding path program 1 times [2021-12-21 12:15:22,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:15:22,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789188561] [2021-12-21 12:15:22,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:15:22,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:15:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:15:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 134 proven. 26 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-21 12:15:22,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:15:22,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789188561] [2021-12-21 12:15:22,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789188561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:15:22,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076493721] [2021-12-21 12:15:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:15:22,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:15:23,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:15:23,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 12:15:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:15:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 12:15:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:15:23,096 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 12:15:23,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 12:15:23,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 12:15:23,268 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 12:15:23,268 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 12:15:23,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:23,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:23,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:23,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:23,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-21 12:15:23,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:15:23,769 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_315) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) is different from false [2021-12-21 12:15:23,932 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_315 (Array Int Int)) (v_ArrVal_310 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_310)) |c_~#array~0.base| v_ArrVal_315) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)) is different from false [2021-12-21 12:15:23,943 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_45| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_45| 1) |c_ULTIMATE.start_main_~i~1#1|)) (forall ((v_ArrVal_315 (Array Int Int)) (v_ArrVal_310 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_45| 4)) v_ArrVal_310)) |c_~#array~0.base| v_ArrVal_315) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)))) is different from false [2021-12-21 12:15:23,957 INFO L353 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2021-12-21 12:15:23,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2021-12-21 12:15:23,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:15:23,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-12-21 12:15:23,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 12:15:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 221 trivial. 25 not checked. [2021-12-21 12:15:24,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076493721] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:15:24,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:15:24,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2021-12-21 12:15:24,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048482190] [2021-12-21 12:15:24,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:15:24,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 12:15:24,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:15:24,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 12:15:24,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1014, Unknown=3, NotChecked=198, Total=1332 [2021-12-21 12:15:24,109 INFO L87 Difference]: Start difference. First operand 218 states and 290 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:26,513 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~i~1#1| 1)) (.cse3 (select |c_#memory_int| |c_~#array~0.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (and (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4 .cse1)) .cse2) (= (select |c_#valid| 3) 1) (= |c_~#array~0.base| 3) (= (select .cse3 (+ |c_~#array~0.offset| 4)) 0) (= 2 .cse2) (not (= 3 |c_ULTIMATE.start_main_~#array~1#1.base|)) (forall ((|v_ULTIMATE.start_main_~i~1#1_45| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_45| 1) |c_ULTIMATE.start_main_~i~1#1|)) (forall ((v_ArrVal_315 (Array Int Int)) (v_ArrVal_310 Int)) (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_45| 4)) v_ArrVal_310)) |c_~#array~0.base| v_ArrVal_315) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4)) 1)))) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= (select .cse3 (+ |c_~#array~0.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1)) |c_ULTIMATE.start_main_~i~1#1|))) is different from false [2021-12-21 12:15:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:15:27,777 INFO L93 Difference]: Finished difference Result 450 states and 596 transitions. [2021-12-21 12:15:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-21 12:15:27,778 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 0 states have call successors, (0), 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 73 [2021-12-21 12:15:27,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:15:27,779 INFO L225 Difference]: With dead ends: 450 [2021-12-21 12:15:27,779 INFO L226 Difference]: Without dead ends: 271 [2021-12-21 12:15:27,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=500, Invalid=3418, Unknown=4, NotChecked=500, Total=4422 [2021-12-21 12:15:27,781 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 167 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 12:15:27,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 483 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1012 Invalid, 0 Unknown, 191 Unchecked, 0.5s Time] [2021-12-21 12:15:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-12-21 12:15:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 238. [2021-12-21 12:15:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.3248945147679325) internal successors, (314), 237 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 314 transitions. [2021-12-21 12:15:27,803 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 314 transitions. Word has length 73 [2021-12-21 12:15:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:15:27,803 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 314 transitions. [2021-12-21 12:15:27,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 314 transitions. [2021-12-21 12:15:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-21 12:15:27,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:15:27,805 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:15:27,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-21 12:15:28,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:28,022 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:15:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:15:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash -68174383, now seen corresponding path program 2 times [2021-12-21 12:15:28,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:15:28,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542317822] [2021-12-21 12:15:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:15:28,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:15:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:15:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-21 12:15:28,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:15:28,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542317822] [2021-12-21 12:15:28,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542317822] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:15:28,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035184198] [2021-12-21 12:15:28,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 12:15:28,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:28,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:15:28,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:15:28,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 12:15:28,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 12:15:28,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:15:28,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 12:15:28,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:15:28,462 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 12:15:28,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 12:15:28,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-21 12:15:28,578 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 12:15:28,579 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 12:15:28,620 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 12:15:28,621 INFO L387 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 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 12:15:28,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:28,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:28,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:28,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:28,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-21 12:15:29,125 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2021-12-21 12:15:29,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:15:29,247 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_380 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_~#array~0.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2)) is different from false [2021-12-21 12:15:29,359 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_374 Int)) (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_374)) |c_~#array~0.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)))) is different from false [2021-12-21 12:15:29,369 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_60| Int)) (or (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_374 Int)) (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* |v_ULTIMATE.start_main_~i~1#1_60| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_374)) |c_~#array~0.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_60| 1) |c_ULTIMATE.start_main_~i~1#1|)))) is different from false [2021-12-21 12:15:29,383 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_374 Int) (v_ArrVal_372 Int) (|v_ULTIMATE.start_main_~i~1#1_60| Int)) (or (= (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_372) (+ (* |v_ULTIMATE.start_main_~i~1#1_60| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_374)) |c_~#array~0.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)) 2) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_60| 1) |c_ULTIMATE.start_main_~i~1#1|)))) is different from false [2021-12-21 12:15:29,407 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_61| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_61| 1) |c_ULTIMATE.start_main_~i~1#1|)) (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_374 Int) (v_ArrVal_372 Int) (|v_ULTIMATE.start_main_~i~1#1_60| Int)) (or (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* |v_ULTIMATE.start_main_~i~1#1_61| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_372) (+ (* |v_ULTIMATE.start_main_~i~1#1_60| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_374)) |c_~#array~0.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_60| 1) |v_ULTIMATE.start_main_~i~1#1_61|)))))) is different from false [2021-12-21 12:15:29,433 INFO L353 Elim1Store]: treesize reduction 122, result has 23.3 percent of original size [2021-12-21 12:15:29,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 49 [2021-12-21 12:15:29,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 12:15:29,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2021-12-21 12:15:29,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 12:15:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 221 trivial. 30 not checked. [2021-12-21 12:15:29,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035184198] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:15:29,558 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:15:29,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 15] total 35 [2021-12-21 12:15:29,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990200685] [2021-12-21 12:15:29,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:15:29,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-21 12:15:29,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:15:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-21 12:15:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=834, Unknown=5, NotChecked=310, Total=1260 [2021-12-21 12:15:29,561 INFO L87 Difference]: Start difference. First operand 238 states and 314 transitions. Second operand has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:31,768 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (+ |c_ULTIMATE.start_main_~i~1#1| 1)) (.cse3 (select |c_#memory_int| |c_~#array~0.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (and (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 4 .cse1)) .cse2) (= (select |c_#valid| 3) 1) (= 3 .cse2) (= |c_~#array~0.base| 3) (= (+ |c_ULTIMATE.start_main_~i~1#1| 2) (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8 .cse1))) (= (select .cse3 (+ |c_~#array~0.offset| 4)) 0) (not (= 3 |c_ULTIMATE.start_main_~#array~1#1.base|)) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (forall ((|v_ULTIMATE.start_main_~i~1#1_61| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_61| 1) |c_ULTIMATE.start_main_~i~1#1|)) (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_374 Int) (v_ArrVal_372 Int) (|v_ULTIMATE.start_main_~i~1#1_60| Int)) (or (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* |v_ULTIMATE.start_main_~i~1#1_61| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_372) (+ (* |v_ULTIMATE.start_main_~i~1#1_60| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_374)) |c_~#array~0.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_60| 1) |v_ULTIMATE.start_main_~i~1#1_61|)))))) (= (select .cse3 (+ |c_~#array~0.offset| 8)) 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#array~1#1.offset| .cse1)) |c_ULTIMATE.start_main_~i~1#1|))) is different from false [2021-12-21 12:15:33,862 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#array~0.base|))) (and (<= |c_ULTIMATE.start_main_~i~1#1| 1) (forall ((|v_ULTIMATE.start_main_~i~1#1_60| Int)) (or (forall ((v_ArrVal_380 (Array Int Int)) (v_ArrVal_374 Int)) (= 2 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ (* |v_ULTIMATE.start_main_~i~1#1_60| 4) |c_ULTIMATE.start_main_~#array~1#1.offset|) v_ArrVal_374)) |c_~#array~0.base| v_ArrVal_380) |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8)))) (not (<= (+ |v_ULTIMATE.start_main_~i~1#1_60| 1) |c_ULTIMATE.start_main_~i~1#1|)))) (= |c_~#array~0.base| 3) (= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base|) (+ |c_ULTIMATE.start_main_~#array~1#1.offset| 8))) (= (select .cse0 (+ |c_~#array~0.offset| 4)) 0) (not (= 3 |c_ULTIMATE.start_main_~#array~1#1.base|)) (not (= |c_~#array~0.base| |c_ULTIMATE.start_main_~#array~1#1.base|)) (= (select .cse0 (+ |c_~#array~0.offset| 8)) 0))) is different from false [2021-12-21 12:15:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:15:34,593 INFO L93 Difference]: Finished difference Result 468 states and 616 transitions. [2021-12-21 12:15:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-21 12:15:34,593 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-21 12:15:34,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:15:34,594 INFO L225 Difference]: With dead ends: 468 [2021-12-21 12:15:34,594 INFO L226 Difference]: Without dead ends: 256 [2021-12-21 12:15:34,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 134 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=296, Invalid=2175, Unknown=7, NotChecked=714, Total=3192 [2021-12-21 12:15:34,596 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:15:34,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 327 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 324 Invalid, 0 Unknown, 209 Unchecked, 0.2s Time] [2021-12-21 12:15:34,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-21 12:15:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 242. [2021-12-21 12:15:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.3153526970954357) internal successors, (317), 241 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 317 transitions. [2021-12-21 12:15:34,625 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 317 transitions. Word has length 77 [2021-12-21 12:15:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:15:34,625 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 317 transitions. [2021-12-21 12:15:34,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 317 transitions. [2021-12-21 12:15:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-21 12:15:34,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:15:34,626 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:15:34,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 12:15:34,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 12:15:34,830 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:15:34,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:15:34,831 INFO L85 PathProgramCache]: Analyzing trace with hash 281330725, now seen corresponding path program 3 times [2021-12-21 12:15:34,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:15:34,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910702300] [2021-12-21 12:15:34,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:15:34,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:15:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:15:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-12-21 12:15:36,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:15:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910702300] [2021-12-21 12:15:36,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910702300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:15:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321975205] [2021-12-21 12:15:36,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 12:15:36,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:36,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:15:36,288 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:15:36,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 12:15:36,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 12:15:36,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:15:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 12:15:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:15:36,481 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 12:15:36,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-21 12:15:36,523 INFO L387 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 23 treesize of output 23 [2021-12-21 12:15:36,545 INFO L387 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 23 treesize of output 23 [2021-12-21 12:15:36,571 INFO L387 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 23 treesize of output 23 [2021-12-21 12:15:36,593 INFO L387 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 23 treesize of output 23 [2021-12-21 12:15:36,615 INFO L387 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 23 treesize of output 23 [2021-12-21 12:15:36,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:15:36,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:15:36,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 12:15:36,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 12:15:36,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2021-12-21 12:15:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-12-21 12:15:36,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:15:37,031 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_439 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array~1#1.base| v_ArrVal_439) |c_~#array~0.base|))) (<= (select .cse0 |c_~#array~0.offset|) (select .cse0 (+ |c_~#array~0.offset| 4))))) is different from false [2021-12-21 12:15:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 9 not checked. [2021-12-21 12:15:37,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321975205] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:15:37,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:15:37,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7, 7] total 41 [2021-12-21 12:15:37,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123541922] [2021-12-21 12:15:37,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:15:37,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-21 12:15:37,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:15:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-21 12:15:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1485, Unknown=1, NotChecked=78, Total=1722 [2021-12-21 12:15:37,094 INFO L87 Difference]: Start difference. First operand 242 states and 317 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:15:38,618 INFO L93 Difference]: Finished difference Result 618 states and 819 transitions. [2021-12-21 12:15:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-21 12:15:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-21 12:15:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:15:38,619 INFO L225 Difference]: With dead ends: 618 [2021-12-21 12:15:38,620 INFO L226 Difference]: Without dead ends: 399 [2021-12-21 12:15:38,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=446, Invalid=4113, Unknown=1, NotChecked=132, Total=4692 [2021-12-21 12:15:38,621 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 131 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 12:15:38,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 309 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 908 Invalid, 0 Unknown, 152 Unchecked, 0.5s Time] [2021-12-21 12:15:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-12-21 12:15:38,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 318. [2021-12-21 12:15:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.3154574132492114) internal successors, (417), 317 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:38,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 417 transitions. [2021-12-21 12:15:38,655 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 417 transitions. Word has length 81 [2021-12-21 12:15:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:15:38,655 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 417 transitions. [2021-12-21 12:15:38,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 12:15:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 417 transitions. [2021-12-21 12:15:38,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-21 12:15:38,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:15:38,656 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:15:38,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 12:15:38,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:38,874 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:15:38,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:15:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash -2022081753, now seen corresponding path program 4 times [2021-12-21 12:15:38,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:15:38,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622320570] [2021-12-21 12:15:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:15:38,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:15:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:15:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 78 proven. 16 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-21 12:15:39,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:15:39,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622320570] [2021-12-21 12:15:39,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622320570] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:15:39,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592706959] [2021-12-21 12:15:39,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 12:15:39,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:15:39,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:15:39,509 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:15:39,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 12:15:39,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 12:15:39,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 12:15:39,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-21 12:15:39,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:15:39,990 INFO L353 Elim1Store]: treesize reduction 333, result has 15.7 percent of original size [2021-12-21 12:15:39,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 63 treesize of output 79 [2021-12-21 12:15:40,080 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-21 12:15:40,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-12-21 12:15:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 121 proven. 30 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-21 12:15:40,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:15:42,359 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_SelectionSort_~rh~0#1_95| Int)) (or (forall ((v_ArrVal_496 Int) (v_ArrVal_495 Int)) (let ((.cse1 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse0 (store (store (select |c_#memory_int| |c_~#array~0.base|) (+ .cse1 |c_~#array~0.offset|) v_ArrVal_496) (+ (* |v_ULTIMATE.start_SelectionSort_~rh~0#1_95| 4) |c_~#array~0.offset|) v_ArrVal_495))) (< (select .cse0 (+ .cse1 |c_~#array~0.offset| 8)) (select .cse0 (+ .cse1 |c_~#array~0.offset| 4)))))) (not (<= |c_ULTIMATE.start_SelectionSort_~i~0#1| |v_ULTIMATE.start_SelectionSort_~rh~0#1_95|)))) is different from false [2021-12-21 12:15:43,106 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_SelectionSort_~rh~0#1_95| Int) (v_ArrVal_496 Int) (v_ArrVal_495 Int)) (or (< |v_ULTIMATE.start_SelectionSort_~rh~0#1_95| (+ |c_ULTIMATE.start_SelectionSort_~i~0#1| 1)) (let ((.cse1 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse0 (store (store (select |c_#memory_int| |c_~#array~0.base|) (+ .cse1 |c_~#array~0.offset|) v_ArrVal_496) (+ (* |v_ULTIMATE.start_SelectionSort_~rh~0#1_95| 4) |c_~#array~0.offset|) v_ArrVal_495))) (< (select .cse0 (+ .cse1 |c_~#array~0.offset| 8)) (select .cse0 (+ .cse1 |c_~#array~0.offset| 4))))))) is different from false [2021-12-21 12:15:43,855 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_SelectionSort_~rh~0#1_95| Int) (v_ArrVal_496 Int) (v_ArrVal_495 Int)) (or (< |v_ULTIMATE.start_SelectionSort_~rh~0#1_95| (+ 2 |c_ULTIMATE.start_SelectionSort_~i~0#1|)) (let ((.cse1 (* |c_ULTIMATE.start_SelectionSort_~lh~0#1| 4))) (let ((.cse0 (store (store (select |c_#memory_int| |c_~#array~0.base|) (+ .cse1 |c_~#array~0.offset|) v_ArrVal_496) (+ (* |v_ULTIMATE.start_SelectionSort_~rh~0#1_95| 4) |c_~#array~0.offset|) v_ArrVal_495))) (< (select .cse0 (+ .cse1 |c_~#array~0.offset| 8)) (select .cse0 (+ .cse1 |c_~#array~0.offset| 4))))))) is different from false [2021-12-21 12:15:47,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 77 [2021-12-21 12:15:47,092 INFO L353 Elim1Store]: treesize reduction 88, result has 49.1 percent of original size [2021-12-21 12:15:47,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 464 treesize of output 467 [2021-12-21 12:15:47,319 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 121 proven. 9 refuted. 0 times theorem prover too weak. 122 trivial. 21 not checked. [2021-12-21 12:15:47,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592706959] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:15:47,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:15:47,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 15] total 37 [2021-12-21 12:15:47,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919679918] [2021-12-21 12:15:47,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:15:47,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-21 12:15:47,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:15:47,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-21 12:15:47,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=984, Unknown=3, NotChecked=198, Total=1332 [2021-12-21 12:15:47,322 INFO L87 Difference]: Start difference. First operand 318 states and 417 transitions. Second operand has 37 states, 37 states have (on average 2.081081081081081) internal successors, (77), 37 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)