./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/conda.c --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/array-fpi/conda.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:10:26,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:10:26,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:10:26,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:10:26,505 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:10:26,508 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:10:26,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:10:26,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:10:26,514 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:10:26,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:10:26,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:10:26,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:10:26,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:10:26,524 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:10:26,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:10:26,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:10:26,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:10:26,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:10:26,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:10:26,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:10:26,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:10:26,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:10:26,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:10:26,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:10:26,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:10:26,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:10:26,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:10:26,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:10:26,550 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:10:26,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:10:26,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:10:26,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:10:26,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:10:26,554 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:10:26,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:10:26,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:10:26,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:10:26,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:10:26,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:10:26,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:10:26,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:10:26,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:10:26,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:10:26,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:10:26,601 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:10:26,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:10:26,602 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:10:26,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:10:26,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:10:26,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:10:26,604 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:10:26,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:10:26,605 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:10:26,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:10:26,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:10:26,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:10:26,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:10:26,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:10:26,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:10:26,606 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:10:26,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:10:26,606 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:10:26,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:10:26,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:10:26,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:10:26,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:10:26,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:10:26,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:10:26,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:10:26,608 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:10:26,608 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:10:26,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:10:26,609 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:10:26,609 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:10:26,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:10:26,609 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:10:26,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 [2021-12-21 10:10:26,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:10:26,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:10:26,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:10:26,851 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:10:26,855 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:10:26,856 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/conda.c [2021-12-21 10:10:26,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2dc212c/afb399ad58dc47dfb0f32beee29d36e4/FLAG1d3be1f91 [2021-12-21 10:10:27,270 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:10:27,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/conda.c [2021-12-21 10:10:27,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2dc212c/afb399ad58dc47dfb0f32beee29d36e4/FLAG1d3be1f91 [2021-12-21 10:10:27,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b2dc212c/afb399ad58dc47dfb0f32beee29d36e4 [2021-12-21 10:10:27,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:10:27,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:10:27,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:10:27,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:10:27,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:10:27,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@186a5541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27, skipping insertion in model container [2021-12-21 10:10:27,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:10:27,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:10:27,442 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/conda.c[588,601] [2021-12-21 10:10:27,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:10:27,472 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:10:27,486 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/conda.c[588,601] [2021-12-21 10:10:27,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:10:27,521 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:10:27,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27 WrapperNode [2021-12-21 10:10:27,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:10:27,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:10:27,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:10:27,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:10:27,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,568 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-12-21 10:10:27,568 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:10:27,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:10:27,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:10:27,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:10:27,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,597 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:10:27,614 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:10:27,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:10:27,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:10:27,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (1/1) ... [2021-12-21 10:10:27,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:10:27,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:27,644 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 10:10:27,649 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 10:10:27,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:10:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:10:27,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 10:10:27,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:10:27,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:10:27,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:10:27,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:10:27,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:10:27,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 10:10:27,731 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:10:27,732 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:10:27,845 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:10:27,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:10:27,850 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 10:10:27,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:27 BoogieIcfgContainer [2021-12-21 10:10:27,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:10:27,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:10:27,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:10:27,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:10:27,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:10:27" (1/3) ... [2021-12-21 10:10:27,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc5dcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:27, skipping insertion in model container [2021-12-21 10:10:27,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:10:27" (2/3) ... [2021-12-21 10:10:27,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc5dcd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:10:27, skipping insertion in model container [2021-12-21 10:10:27,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:10:27" (3/3) ... [2021-12-21 10:10:27,858 INFO L111 eAbstractionObserver]: Analyzing ICFG conda.c [2021-12-21 10:10:27,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:10:27,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:10:27,898 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:10:27,904 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 10:10:27,904 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:10:27,930 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 10:10:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 10:10:27,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:27,935 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:27,935 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:27,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:27,939 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-12-21 10:10:27,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:27,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089959715] [2021-12-21 10:10:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:27,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:28,138 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 10:10:28,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:28,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089959715] [2021-12-21 10:10:28,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089959715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:10:28,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:10:28,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:10:28,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475034782] [2021-12-21 10:10:28,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:10:28,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 10:10:28,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 10:10:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:10:28,184 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:28,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:28,198 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-21 10:10:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 10:10:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 10:10:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:28,207 INFO L225 Difference]: With dead ends: 40 [2021-12-21 10:10:28,207 INFO L226 Difference]: Without dead ends: 18 [2021-12-21 10:10:28,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 10:10:28,214 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:28,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:10:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-21 10:10:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-21 10:10:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-21 10:10:28,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-21 10:10:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:28,248 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-21 10:10:28,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-21 10:10:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 10:10:28,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:28,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:28,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:10:28,250 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:28,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:28,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-12-21 10:10:28,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:28,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279862963] [2021-12-21 10:10:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:28,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:28,364 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 10:10:28,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279862963] [2021-12-21 10:10:28,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279862963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:10:28,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:10:28,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:10:28,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176001691] [2021-12-21 10:10:28,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:10:28,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:10:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:10:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:10:28,370 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:28,435 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-21 10:10:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:10:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 10:10:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:28,437 INFO L225 Difference]: With dead ends: 36 [2021-12-21 10:10:28,437 INFO L226 Difference]: Without dead ends: 25 [2021-12-21 10:10:28,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:10:28,440 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:28,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:10:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-21 10:10:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-21 10:10:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-21 10:10:28,450 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-12-21 10:10:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:28,452 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-21 10:10:28,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:28,453 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-21 10:10:28,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 10:10:28,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:28,454 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:28,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:10:28,454 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:28,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-12-21 10:10:28,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:28,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971712358] [2021-12-21 10:10:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:28,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:29,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:29,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971712358] [2021-12-21 10:10:29,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971712358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360910553] [2021-12-21 10:10:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:29,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:29,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:29,011 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 10:10:29,040 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 10:10:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:29,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-21 10:10:29,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:29,150 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 10 treesize of output 8 [2021-12-21 10:10:29,172 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 11 treesize of output 7 [2021-12-21 10:10:29,218 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 14 treesize of output 16 [2021-12-21 10:10:29,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-12-21 10:10:29,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2021-12-21 10:10:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:29,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:29,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:10:29,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 28 [2021-12-21 10:10:29,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 10:10:29,823 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 1 case distinctions, treesize of input 24 treesize of output 25 [2021-12-21 10:10:29,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:10:29,828 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 22 treesize of output 14 [2021-12-21 10:10:29,832 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 16 treesize of output 12 [2021-12-21 10:10:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:29,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360910553] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:29,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:29,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 27 [2021-12-21 10:10:29,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131545637] [2021-12-21 10:10:29,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:29,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-21 10:10:29,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-21 10:10:29,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-12-21 10:10:29,852 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:30,246 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2021-12-21 10:10:30,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 10:10:30,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 10:10:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:30,249 INFO L225 Difference]: With dead ends: 46 [2021-12-21 10:10:30,249 INFO L226 Difference]: Without dead ends: 41 [2021-12-21 10:10:30,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 10:10:30,251 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:30,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 68 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 179 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2021-12-21 10:10:30,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-21 10:10:30,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-12-21 10:10:30,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:30,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-21 10:10:30,258 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2021-12-21 10:10:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:30,258 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-21 10:10:30,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:30,259 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-21 10:10:30,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-21 10:10:30,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:30,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:30,296 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 10:10:30,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:30,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-12-21 10:10:30,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:30,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157527794] [2021-12-21 10:10:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:30,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:30,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157527794] [2021-12-21 10:10:30,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157527794] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:30,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763121201] [2021-12-21 10:10:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:30,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:30,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:30,585 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 10:10:30,586 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 10:10:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 10:10:30,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:30,664 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-21 10:10:30,699 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 15 treesize of output 7 [2021-12-21 10:10:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:30,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:30,760 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 14 treesize of output 12 [2021-12-21 10:10:30,762 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 22 treesize of output 20 [2021-12-21 10:10:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:30,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763121201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:30,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:30,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-21 10:10:30,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865653382] [2021-12-21 10:10:30,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:30,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 10:10:30,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:30,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 10:10:30,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:10:30,782 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 10:10:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:30,876 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-12-21 10:10:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 10:10:30,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-21 10:10:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:30,880 INFO L225 Difference]: With dead ends: 49 [2021-12-21 10:10:30,880 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 10:10:30,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-21 10:10:30,881 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:30,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:10:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 10:10:30,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-21 10:10:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:30,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-12-21 10:10:30,887 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-12-21 10:10:30,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:30,887 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-12-21 10:10:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 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 10:10:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-12-21 10:10:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:10:30,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:30,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:30,913 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 10:10:31,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-21 10:10:31,111 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:31,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:31,112 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-12-21 10:10:31,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:31,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561831962] [2021-12-21 10:10:31,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:31,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:31,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:31,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561831962] [2021-12-21 10:10:31,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561831962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:31,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135322803] [2021-12-21 10:10:31,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 10:10:31,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:31,179 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 10:10:31,199 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 10:10:31,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 10:10:31,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:31,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:10:31,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:31,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:31,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135322803] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:31,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:31,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:10:31,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000181860] [2021-12-21 10:10:31,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:31,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:10:31,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:31,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:10:31,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:10:31,357 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 10:10:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:31,457 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-12-21 10:10:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:10:31,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 22 [2021-12-21 10:10:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:31,458 INFO L225 Difference]: With dead ends: 70 [2021-12-21 10:10:31,458 INFO L226 Difference]: Without dead ends: 44 [2021-12-21 10:10:31,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-21 10:10:31,459 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:31,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 31 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:10:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-21 10:10:31,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-12-21 10:10:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-21 10:10:31,465 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-12-21 10:10:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:31,465 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-21 10:10:31,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 10:10:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-21 10:10:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-21 10:10:31,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:31,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:31,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:10:31,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:31,684 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:31,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:31,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-12-21 10:10:31,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:31,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849010551] [2021-12-21 10:10:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:31,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:31,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849010551] [2021-12-21 10:10:31,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849010551] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683945621] [2021-12-21 10:10:31,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 10:10:31,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:31,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:31,736 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 10:10:31,747 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 10:10:31,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 10:10:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 10:10:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:31,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 10:10:31,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683945621] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:31,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:31,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-21 10:10:31,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479814629] [2021-12-21 10:10:31,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:31,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 10:10:31,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:31,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 10:10:31,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-21 10:10:31,921 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 10:10:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:32,013 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-21 10:10:32,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 10:10:32,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 22 [2021-12-21 10:10:32,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:32,016 INFO L225 Difference]: With dead ends: 39 [2021-12-21 10:10:32,017 INFO L226 Difference]: Without dead ends: 31 [2021-12-21 10:10:32,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-21 10:10:32,019 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:32,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 10:10:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-21 10:10:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-21 10:10:32,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 10:10:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-21 10:10:32,031 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-12-21 10:10:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:32,031 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-21 10:10:32,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 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 10:10:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-21 10:10:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:10:32,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:32,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:32,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-21 10:10:32,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:32,248 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:32,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-12-21 10:10:32,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:32,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301040819] [2021-12-21 10:10:32,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:32,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:32,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:32,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:32,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301040819] [2021-12-21 10:10:32,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301040819] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:32,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082671471] [2021-12-21 10:10:32,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 10:10:32,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:32,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:32,991 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 10:10:32,992 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 10:10:33,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 10:10:33,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:33,046 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-21 10:10:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:33,068 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:10:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,105 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 14 treesize of output 16 [2021-12-21 10:10:33,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,155 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 14 treesize of output 16 [2021-12-21 10:10:33,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-21 10:10:33,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 37 [2021-12-21 10:10:33,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:10:33,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2021-12-21 10:10:33,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-12-21 10:10:33,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:10:33,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 34 [2021-12-21 10:10:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:10:33,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:34,800 INFO L353 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-12-21 10:10:34,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 554 treesize of output 290 [2021-12-21 10:10:34,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:10:34,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 67 [2021-12-21 10:10:36,996 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse0 (select v_arrayElimArr_4 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_4))) (let ((.cse4 (select .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse3 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse2))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse5))) (and (<= (div (+ (- 1) .cse0 .cse1 .cse2) 2) |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) (div (+ .cse0 .cse1 .cse2) 2))))))) (not (= (+ (select v_arrayElimArr_4 .cse5) (- 1)) 1)) (not (= (+ (- 1) .cse0) 1))))) is different from false [2021-12-21 10:10:39,189 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_4 (Array Int Int))) (let ((.cse1 (select v_arrayElimArr_4 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= (+ (select v_arrayElimArr_4 .cse0) (- 1)) 1)) (not (= (+ (- 1) .cse1) 1)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_4))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse3))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (and (<= (div (+ (- 1) .cse1 .cse2 .cse3) 2) (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (div (+ .cse1 .cse2 .cse3) 2)))))))))) is different from false [2021-12-21 10:10:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-21 10:10:39,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082671471] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:39,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:39,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 49 [2021-12-21 10:10:39,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705133612] [2021-12-21 10:10:39,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:39,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 10:10:39,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 10:10:39,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1863, Unknown=2, NotChecked=182, Total=2352 [2021-12-21 10:10:39,294 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 10:10:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:52,363 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-12-21 10:10:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-21 10:10:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 10:10:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:52,364 INFO L225 Difference]: With dead ends: 77 [2021-12-21 10:10:52,364 INFO L226 Difference]: Without dead ends: 72 [2021-12-21 10:10:52,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=842, Invalid=4863, Unknown=3, NotChecked=298, Total=6006 [2021-12-21 10:10:52,367 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:52,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 116 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 679 Invalid, 0 Unknown, 171 Unchecked, 2.0s Time] [2021-12-21 10:10:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-21 10:10:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2021-12-21 10:10:52,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-21 10:10:52,374 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 27 [2021-12-21 10:10:52,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:52,374 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-21 10:10:52,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 49 states have internal predecessors, (68), 0 states have call successors, (0), 0 states 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 10:10:52,374 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-21 10:10:52,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-21 10:10:52,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:52,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:52,394 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 10:10:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:52,587 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-12-21 10:10:52,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:52,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283917068] [2021-12-21 10:10:52,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:52,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:10:52,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:52,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283917068] [2021-12-21 10:10:52,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283917068] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:52,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641361026] [2021-12-21 10:10:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:52,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:52,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:52,962 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 10:10:52,963 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 10:10:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:53,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-21 10:10:53,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:53,060 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-21 10:10:53,188 INFO L353 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-21 10:10:53,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-21 10:10:53,253 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 19 treesize of output 7 [2021-12-21 10:10:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:10:53,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:53,562 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 16 treesize of output 14 [2021-12-21 10:10:53,568 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 28 treesize of output 24 [2021-12-21 10:10:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 10:10:53,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641361026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:53,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:53,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2021-12-21 10:10:53,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498877059] [2021-12-21 10:10:53,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:53,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 10:10:53,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:53,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 10:10:53,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-21 10:10:53,615 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:54,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:54,450 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-12-21 10:10:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 10:10:54,451 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-21 10:10:54,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:54,451 INFO L225 Difference]: With dead ends: 63 [2021-12-21 10:10:54,451 INFO L226 Difference]: Without dead ends: 50 [2021-12-21 10:10:54,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-21 10:10:54,452 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:54,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 54 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:10:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-21 10:10:54,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-21 10:10:54,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:54,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-21 10:10:54,459 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 27 [2021-12-21 10:10:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:54,460 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-21 10:10:54,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:54,460 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-21 10:10:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 10:10:54,461 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:54,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:54,486 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 10:10:54,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:54,684 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:54,684 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-12-21 10:10:54,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:54,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991466517] [2021-12-21 10:10:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:54,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:10:54,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:54,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991466517] [2021-12-21 10:10:54,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991466517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:54,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136926704] [2021-12-21 10:10:54,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 10:10:54,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:54,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:54,963 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 10:10:54,965 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 10:10:55,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-21 10:10:55,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:10:55,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:10:55,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 10:10:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136926704] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:55,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:55,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:10:55,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311988569] [2021-12-21 10:10:55,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:55,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:10:55,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:10:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:10:55,481 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 10:10:55,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:55,943 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-21 10:10:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 10:10:55,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 29 [2021-12-21 10:10:55,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:55,944 INFO L225 Difference]: With dead ends: 77 [2021-12-21 10:10:55,944 INFO L226 Difference]: Without dead ends: 43 [2021-12-21 10:10:55,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-21 10:10:55,945 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:55,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 35 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:10:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-21 10:10:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-21 10:10:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-21 10:10:55,962 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-12-21 10:10:55,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:55,962 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-21 10:10:55,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 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 10:10:55,962 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-21 10:10:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 10:10:55,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:55,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:55,980 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 10:10:56,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:56,168 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:56,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:56,168 INFO L85 PathProgramCache]: Analyzing trace with hash -863925553, now seen corresponding path program 6 times [2021-12-21 10:10:56,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:56,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425753962] [2021-12-21 10:10:56,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:56,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:10:56,363 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 10:10:56,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:10:56,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425753962] [2021-12-21 10:10:56,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425753962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:10:56,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083517491] [2021-12-21 10:10:56,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 10:10:56,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:10:56,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:10:56,364 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 10:10:56,365 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 10:10:56,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-21 10:10:56,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 10:10:56,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 10:10:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:10:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:10:56,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:10:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:10:56,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083517491] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:10:56,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:10:56,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-21 10:10:56,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092953062] [2021-12-21 10:10:56,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:10:56,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 10:10:56,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:10:56,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 10:10:56,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-21 10:10:56,827 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:10:57,274 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-21 10:10:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 10:10:57,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 10:10:57,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:10:57,275 INFO L225 Difference]: With dead ends: 42 [2021-12-21 10:10:57,276 INFO L226 Difference]: Without dead ends: 38 [2021-12-21 10:10:57,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-21 10:10:57,276 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:10:57,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 23 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:10:57,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-21 10:10:57,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-21 10:10:57,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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 10:10:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-21 10:10:57,281 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2021-12-21 10:10:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:10:57,282 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-21 10:10:57,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:10:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-21 10:10:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 10:10:57,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:10:57,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:10:57,308 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 10:10:57,505 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,SelfDestructingSolverStorable9 [2021-12-21 10:10:57,506 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:10:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:10:57,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2021-12-21 10:10:57,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:10:57,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925029039] [2021-12-21 10:10:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:10:57,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:10:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:11:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:11:00,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:11:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925029039] [2021-12-21 10:11:00,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925029039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:11:00,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188321320] [2021-12-21 10:11:00,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-21 10:11:00,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:11:00,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:11:00,946 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 10:11:00,947 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 10:11:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:11:01,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 10:11:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:11:01,037 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 10:11:01,048 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 10 treesize of output 8 [2021-12-21 10:11:01,149 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 14 treesize of output 16 [2021-12-21 10:11:01,269 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 14 treesize of output 16 [2021-12-21 10:11:01,411 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 14 treesize of output 16 [2021-12-21 10:11:02,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-21 10:11:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:02,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-21 10:11:02,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:02,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:02,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:02,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-12-21 10:11:03,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:03,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:03,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:03,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:03,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-21 10:11:03,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:03,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:03,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:03,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 10:11:03,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-12-21 10:11:04,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 51 [2021-12-21 10:11:04,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 37 [2021-12-21 10:11:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:11:04,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 10:11:09,736 INFO L353 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-12-21 10:11:09,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 39536 treesize of output 12140 [2021-12-21 10:11:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:09,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-12-21 10:11:10,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2021-12-21 10:11:10,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 301 [2021-12-21 10:11:10,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 145 [2021-12-21 10:11:10,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 10:11:10,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 29 [2021-12-21 10:11:13,006 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_8 (Array Int Int))) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (select v_arrayElimArr_8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= (+ (- 1) (select v_arrayElimArr_8 .cse0)) 1)) (not (= (+ (- 1) (select v_arrayElimArr_8 .cse1)) 1)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_8))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) (div (+ .cse2 .cse3 .cse4 .cse5) 2)) (<= (div (+ (- 1) .cse2 .cse3 .cse4 .cse5) 2) |c_ULTIMATE.start_main_~i~0#1|))))))) (not (= (+ (- 1) .cse5) 1))))) is different from false [2021-12-21 10:11:16,103 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_8 (Array Int Int))) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (select v_arrayElimArr_8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= (+ (- 1) (select v_arrayElimArr_8 .cse0)) 1)) (not (= (+ (- 1) (select v_arrayElimArr_8 .cse1)) 1)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_8))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (and (<= (div (+ (- 1) .cse2 .cse3 .cse4 .cse5) 2) (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (div (+ .cse2 .cse3 .cse4 .cse5) 2)))))))) (not (= (+ (- 1) .cse5) 1))))) is different from false [2021-12-21 10:11:19,521 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_8 (Array Int Int))) (let ((.cse1 (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse5 (select v_arrayElimArr_8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (or (not (= (+ (- 1) (select v_arrayElimArr_8 .cse0)) 1)) (not (= (+ (- 1) (select v_arrayElimArr_8 .cse1)) 1)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_8))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse2 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse0))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse1))) (and (<= (div (+ (- 1) .cse2 .cse3 .cse4 .cse5) 2) (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (<= (+ 3 |c_ULTIMATE.start_main_~i~0#1|) (div (+ .cse2 .cse3 .cse4 .cse5) 2)))))))) (not (= (+ (- 1) .cse5) 1))))) is different from false [2021-12-21 10:11:19,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-21 10:11:19,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188321320] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 10:11:19,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 10:11:19,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 67 [2021-12-21 10:11:19,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570086829] [2021-12-21 10:11:19,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 10:11:19,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-21 10:11:19,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:11:19,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-21 10:11:19,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=3533, Unknown=3, NotChecked=378, Total=4422 [2021-12-21 10:11:19,865 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 67 states, 67 states have (on average 1.3582089552238805) internal successors, (91), 67 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)