./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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-examples/standard_sentinel-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:34:12,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:34:12,174 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:34:12,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:34:12,217 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:34:12,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:34:12,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:34:12,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:34:12,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:34:12,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:34:12,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:34:12,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:34:12,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:34:12,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:34:12,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:34:12,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:34:12,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:34:12,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:34:12,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:34:12,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:34:12,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:34:12,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:34:12,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:34:12,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:34:12,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:34:12,260 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:34:12,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:34:12,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:34:12,263 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:34:12,264 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:34:12,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:34:12,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:34:12,267 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:34:12,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:34:12,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:34:12,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:34:12,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:34:12,271 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:34:12,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:34:12,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:34:12,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:34:12,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:34:12,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:34:12,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:34:12,312 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:34:12,312 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:34:12,313 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:34:12,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:34:12,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:34:12,314 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:34:12,314 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:34:12,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:34:12,315 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:34:12,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:34:12,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:34:12,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:34:12,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:34:12,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:34:12,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:34:12,317 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:34:12,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:34:12,317 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:34:12,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:34:12,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:34:12,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:34:12,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:34:12,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:34:12,318 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:34:12,318 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:34:12,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:34:12,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:34:12,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:34:12,320 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:34:12,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:34:12,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:34:12,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:34:12,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2021-12-15 08:34:12,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:34:12,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:34:12,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:34:12,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:34:12,578 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:34:12,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2021-12-15 08:34:12,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31311378e/ebe3efb88614466a91173fed0be70ff0/FLAG45fc1469e [2021-12-15 08:34:13,063 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:34:13,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2021-12-15 08:34:13,074 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31311378e/ebe3efb88614466a91173fed0be70ff0/FLAG45fc1469e [2021-12-15 08:34:13,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31311378e/ebe3efb88614466a91173fed0be70ff0 [2021-12-15 08:34:13,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:34:13,464 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:34:13,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:34:13,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:34:13,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:34:13,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a4b454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13, skipping insertion in model container [2021-12-15 08:34:13,471 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:34:13,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:34:13,629 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-examples/standard_sentinel-2.i[852,865] [2021-12-15 08:34:13,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:34:13,647 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:34:13,658 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-examples/standard_sentinel-2.i[852,865] [2021-12-15 08:34:13,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:34:13,675 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:34:13,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13 WrapperNode [2021-12-15 08:34:13,676 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:34:13,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:34:13,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:34:13,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:34:13,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,704 INFO L137 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2021-12-15 08:34:13,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:34:13,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:34:13,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:34:13,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:34:13,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,712 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,712 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:34:13,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:34:13,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:34:13,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:34:13,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (1/1) ... [2021-12-15 08:34:13,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:34:13,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:13,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 08:34:13,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 08:34:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:34:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:34:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:34:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:34:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:34:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:34:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:34:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:34:13,844 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:34:13,846 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:34:14,007 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:34:14,012 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:34:14,012 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-15 08:34:14,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:34:14 BoogieIcfgContainer [2021-12-15 08:34:14,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:34:14,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:34:14,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:34:14,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:34:14,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:34:13" (1/3) ... [2021-12-15 08:34:14,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88c3202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:34:14, skipping insertion in model container [2021-12-15 08:34:14,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:34:13" (2/3) ... [2021-12-15 08:34:14,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88c3202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:34:14, skipping insertion in model container [2021-12-15 08:34:14,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:34:14" (3/3) ... [2021-12-15 08:34:14,039 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2021-12-15 08:34:14,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:34:14,050 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:34:14,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:34:14,118 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 08:34:14,118 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:34:14,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) [2021-12-15 08:34:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-15 08:34:14,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:14,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:14,147 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:14,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:14,157 INFO L85 PathProgramCache]: Analyzing trace with hash 214135089, now seen corresponding path program 1 times [2021-12-15 08:34:14,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:14,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186258772] [2021-12-15 08:34:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:14,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:34:14,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:14,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186258772] [2021-12-15 08:34:14,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186258772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:34:14,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:34:14,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 08:34:14,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912483886] [2021-12-15 08:34:14,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:34:14,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 08:34:14,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:14,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 08:34:14,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:34:14,412 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:14,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:14,444 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-12-15 08:34:14,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 08:34:14,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-12-15 08:34:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:14,454 INFO L225 Difference]: With dead ends: 30 [2021-12-15 08:34:14,454 INFO L226 Difference]: Without dead ends: 13 [2021-12-15 08:34:14,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 08:34:14,463 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:14,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:34:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-12-15 08:34:14,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-12-15 08:34:14,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2021-12-15 08:34:14,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-15 08:34:14,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2021-12-15 08:34:14,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:14,495 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-15 08:34:14,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-15 08:34:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-15 08:34:14,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:14,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:14,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:34:14,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1622702096, now seen corresponding path program 1 times [2021-12-15 08:34:14,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:14,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117251319] [2021-12-15 08:34:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:14,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:34:14,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117251319] [2021-12-15 08:34:14,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117251319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:34:14,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867066147] [2021-12-15 08:34:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:14,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:14,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:14,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:34:14,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 08:34:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:14,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 08:34:14,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:34:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:34:14,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:34:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:34:14,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867066147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:34:14,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:34:14,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-15 08:34:14,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333940400] [2021-12-15 08:34:14,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:34:14,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 08:34:14,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 08:34:14,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:34:14,804 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:14,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:14,828 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-12-15 08:34:14,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 08:34:14,829 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-15 08:34:14,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:14,829 INFO L225 Difference]: With dead ends: 25 [2021-12-15 08:34:14,830 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 08:34:14,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-15 08:34:14,831 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:14,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:34:14,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 08:34:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-15 08:34:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-15 08:34:14,836 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2021-12-15 08:34:14,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:14,836 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-15 08:34:14,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:14,837 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-15 08:34:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-15 08:34:14,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:14,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:14,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 08:34:15,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:15,056 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:15,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:15,057 INFO L85 PathProgramCache]: Analyzing trace with hash 49509066, now seen corresponding path program 2 times [2021-12-15 08:34:15,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:15,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891528701] [2021-12-15 08:34:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:15,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 08:34:15,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:15,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891528701] [2021-12-15 08:34:15,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891528701] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:34:15,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:34:15,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:34:15,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747870424] [2021-12-15 08:34:15,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:34:15,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:34:15,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:34:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:34:15,167 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:15,190 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-15 08:34:15,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:34:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-15 08:34:15,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:15,191 INFO L225 Difference]: With dead ends: 24 [2021-12-15 08:34:15,191 INFO L226 Difference]: Without dead ends: 20 [2021-12-15 08:34:15,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 08:34:15,193 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:15,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:34:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-15 08:34:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-15 08:34:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 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) [2021-12-15 08:34:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-15 08:34:15,197 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-12-15 08:34:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:15,197 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-15 08:34:15,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-15 08:34:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-15 08:34:15,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:15,199 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:15,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 08:34:15,199 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash 382246981, now seen corresponding path program 1 times [2021-12-15 08:34:15,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:15,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128550968] [2021-12-15 08:34:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:15,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:34:15,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:15,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128550968] [2021-12-15 08:34:15,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128550968] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:34:15,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273640256] [2021-12-15 08:34:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:15,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:15,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:15,278 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:34:15,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 08:34:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:15,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:34:15,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:34:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:34:15,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:34:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:34:15,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273640256] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:34:15,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:34:15,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-15 08:34:15,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162972164] [2021-12-15 08:34:15,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:34:15,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-15 08:34:15,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:15,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-15 08:34:15,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:34:15,540 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-12-15 08:34:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:15,598 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-12-15 08:34:15,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:34:15,598 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-15 08:34:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:15,599 INFO L225 Difference]: With dead ends: 41 [2021-12-15 08:34:15,599 INFO L226 Difference]: Without dead ends: 32 [2021-12-15 08:34:15,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:34:15,601 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:15,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:34:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-15 08:34:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-15 08:34:15,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-15 08:34:15,606 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2021-12-15 08:34:15,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:15,606 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-15 08:34:15,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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) [2021-12-15 08:34:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-15 08:34:15,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 08:34:15,607 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:15,608 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:15,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 08:34:15,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-15 08:34:15,822 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:15,823 INFO L85 PathProgramCache]: Analyzing trace with hash 822799929, now seen corresponding path program 2 times [2021-12-15 08:34:15,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:15,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294839284] [2021-12-15 08:34:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:15,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:15,978 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:34:15,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294839284] [2021-12-15 08:34:15,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294839284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:34:15,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524914313] [2021-12-15 08:34:15,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:34:15,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:15,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:15,981 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:34:16,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 08:34:16,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:34:16,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:34:16,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-15 08:34:16,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:34:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:34:16,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:34:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:34:16,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524914313] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:34:16,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:34:16,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-15 08:34:16,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459497946] [2021-12-15 08:34:16,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:34:16,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-15 08:34:16,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:16,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-15 08:34:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:34:16,463 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:16,553 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2021-12-15 08:34:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-15 08:34:16,554 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 08:34:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:16,555 INFO L225 Difference]: With dead ends: 65 [2021-12-15 08:34:16,555 INFO L226 Difference]: Without dead ends: 56 [2021-12-15 08:34:16,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:34:16,557 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:16,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:34:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-15 08:34:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-12-15 08:34:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-15 08:34:16,564 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2021-12-15 08:34:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:16,565 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-15 08:34:16,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-15 08:34:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 08:34:16,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:16,566 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:16,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 08:34:16,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:16,788 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash 798531617, now seen corresponding path program 3 times [2021-12-15 08:34:16,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:16,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848089898] [2021-12-15 08:34:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:16,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-15 08:34:17,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:17,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848089898] [2021-12-15 08:34:17,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848089898] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:34:17,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711627993] [2021-12-15 08:34:17,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:34:17,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:17,209 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:34:17,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 08:34:17,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-15 08:34:17,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:34:17,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 08:34:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:34:17,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 08:34:17,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:34:17,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-15 08:34:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-15 08:34:17,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:34:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-12-15 08:34:17,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711627993] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:34:17,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:34:17,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2021-12-15 08:34:17,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474022235] [2021-12-15 08:34:17,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:34:17,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 08:34:17,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 08:34:17,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=671, Unknown=0, NotChecked=0, Total=992 [2021-12-15 08:34:17,764 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:17,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:17,997 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-12-15 08:34:17,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-15 08:34:17,998 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 08:34:17,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:17,999 INFO L225 Difference]: With dead ends: 76 [2021-12-15 08:34:17,999 INFO L226 Difference]: Without dead ends: 63 [2021-12-15 08:34:18,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-12-15 08:34:18,001 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:18,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:34:18,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-15 08:34:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-12-15 08:34:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-12-15 08:34:18,010 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2021-12-15 08:34:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:18,011 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-12-15 08:34:18,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-12-15 08:34:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-15 08:34:18,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:18,016 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:18,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-15 08:34:18,231 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 [2021-12-15 08:34:18,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 498607765, now seen corresponding path program 4 times [2021-12-15 08:34:18,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:18,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804475838] [2021-12-15 08:34:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:18,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:34:18,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:18,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804475838] [2021-12-15 08:34:18,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804475838] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:34:18,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400911268] [2021-12-15 08:34:18,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:34:18,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:18,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:18,565 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) [2021-12-15 08:34:18,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 08:34:18,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:34:18,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:34:18,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-15 08:34:18,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:34:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:34:18,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:34:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:34:19,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400911268] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:34:19,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:34:19,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-15 08:34:19,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777134858] [2021-12-15 08:34:19,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:34:19,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-15 08:34:19,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-15 08:34:19,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 08:34:19,576 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:19,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:19,749 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2021-12-15 08:34:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-15 08:34:19,750 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-15 08:34:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:19,759 INFO L225 Difference]: With dead ends: 125 [2021-12-15 08:34:19,759 INFO L226 Difference]: Without dead ends: 112 [2021-12-15 08:34:19,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-15 08:34:19,762 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 72 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:19,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 26 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:34:19,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-15 08:34:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-12-15 08:34:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:19,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2021-12-15 08:34:19,784 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 61 [2021-12-15 08:34:19,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:19,785 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2021-12-15 08:34:19,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:19,786 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2021-12-15 08:34:19,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-15 08:34:19,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:19,789 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:19,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 08:34:19,999 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 [2021-12-15 08:34:20,000 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:20,000 INFO L85 PathProgramCache]: Analyzing trace with hash -804209501, now seen corresponding path program 5 times [2021-12-15 08:34:20,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:20,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155274006] [2021-12-15 08:34:20,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:20,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:34:21,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:21,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155274006] [2021-12-15 08:34:21,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155274006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:34:21,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790286054] [2021-12-15 08:34:21,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:34:21,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:21,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:21,060 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) [2021-12-15 08:34:21,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 08:34:31,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-12-15 08:34:31,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:34:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-15 08:34:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:34:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:34:31,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:34:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:34:34,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790286054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:34:34,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:34:34,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-15 08:34:34,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53308242] [2021-12-15 08:34:34,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:34:34,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-15 08:34:34,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-15 08:34:34,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-15 08:34:34,505 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:34,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:34,795 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2021-12-15 08:34:34,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-15 08:34:34,796 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-15 08:34:34,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:34,797 INFO L225 Difference]: With dead ends: 225 [2021-12-15 08:34:34,797 INFO L226 Difference]: Without dead ends: 212 [2021-12-15 08:34:34,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-15 08:34:34,800 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 147 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:34,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 50 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-15 08:34:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-15 08:34:34,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-15 08:34:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2021-12-15 08:34:34,814 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 111 [2021-12-15 08:34:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:34,814 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2021-12-15 08:34:34,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:34,815 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2021-12-15 08:34:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-15 08:34:34,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:34,817 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:34,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 08:34:35,039 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 [2021-12-15 08:34:35,040 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1800984001, now seen corresponding path program 6 times [2021-12-15 08:34:35,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:35,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082997748] [2021-12-15 08:34:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:35,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:34:38,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:38,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082997748] [2021-12-15 08:34:38,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082997748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:34:38,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963495293] [2021-12-15 08:34:38,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:34:38,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:38,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:38,386 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) [2021-12-15 08:34:38,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 08:34:38,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-15 08:34:38,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:34:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-15 08:34:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:34:38,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-15 08:34:39,251 INFO L354 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2021-12-15 08:34:39,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 59 [2021-12-15 08:34:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-12-15 08:34:39,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:34:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2021-12-15 08:34:40,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963495293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:34:40,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:34:40,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 10, 10] total 116 [2021-12-15 08:34:40,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473789219] [2021-12-15 08:34:40,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:34:40,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-12-15 08:34:40,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:40,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-12-15 08:34:40,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5114, Invalid=8226, Unknown=0, NotChecked=0, Total=13340 [2021-12-15 08:34:40,473 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:41,528 INFO L93 Difference]: Finished difference Result 238 states and 243 transitions. [2021-12-15 08:34:41,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-12-15 08:34:41,529 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 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 211 [2021-12-15 08:34:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:41,532 INFO L225 Difference]: With dead ends: 238 [2021-12-15 08:34:41,532 INFO L226 Difference]: Without dead ends: 221 [2021-12-15 08:34:41,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 406 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5176, Invalid=9830, Unknown=0, NotChecked=0, Total=15006 [2021-12-15 08:34:41,537 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 116 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:41,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 66 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 329 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2021-12-15 08:34:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-15 08:34:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2021-12-15 08:34:41,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2021-12-15 08:34:41,567 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 211 [2021-12-15 08:34:41,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:41,569 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2021-12-15 08:34:41,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 116 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2021-12-15 08:34:41,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-12-15 08:34:41,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:41,576 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:41,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-15 08:34:41,799 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 [2021-12-15 08:34:41,800 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash -43122706, now seen corresponding path program 7 times [2021-12-15 08:34:41,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:41,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260531111] [2021-12-15 08:34:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:41,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 08:34:45,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:34:45,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260531111] [2021-12-15 08:34:45,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260531111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:34:45,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707709411] [2021-12-15 08:34:45,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:34:45,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:34:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:34:45,114 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) [2021-12-15 08:34:45,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-15 08:34:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:34:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 980 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-15 08:34:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:34:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 08:34:45,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:34:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9843 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 08:34:55,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707709411] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:34:55,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:34:55,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-12-15 08:34:55,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669149654] [2021-12-15 08:34:55,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:34:55,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-15 08:34:55,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:34:55,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-15 08:34:55,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-15 08:34:55,083 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:55,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:34:55,919 INFO L93 Difference]: Finished difference Result 441 states and 543 transitions. [2021-12-15 08:34:55,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-15 08:34:55,920 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 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 219 [2021-12-15 08:34:55,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:34:55,922 INFO L225 Difference]: With dead ends: 441 [2021-12-15 08:34:55,922 INFO L226 Difference]: Without dead ends: 422 [2021-12-15 08:34:55,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-15 08:34:55,926 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 300 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:34:55,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 34 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:34:55,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-15 08:34:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 422. [2021-12-15 08:34:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 1.004750593824228) internal successors, (423), 421 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 423 transitions. [2021-12-15 08:34:55,940 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 423 transitions. Word has length 219 [2021-12-15 08:34:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:34:55,941 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 423 transitions. [2021-12-15 08:34:55,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:34:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 423 transitions. [2021-12-15 08:34:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2021-12-15 08:34:55,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:34:55,949 INFO L514 BasicCegarLoop]: trace histogram [200, 200, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:34:55,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-15 08:34:56,171 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 [2021-12-15 08:34:56,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:34:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:34:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1310128924, now seen corresponding path program 8 times [2021-12-15 08:34:56,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:34:56,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170218359] [2021-12-15 08:34:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:34:56,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:34:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:35:08,556 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 08:35:08,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:35:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170218359] [2021-12-15 08:35:08,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170218359] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:35:08,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132179105] [2021-12-15 08:35:08,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:35:08,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:35:08,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:35:08,559 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) [2021-12-15 08:35:08,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-15 08:35:09,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:35:09,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:35:09,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 202 conjunts are in the unsatisfiable core [2021-12-15 08:35:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:35:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 40042 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 08:35:09,841 INFO L328 TraceCheckSpWp]: Computing backward predicates...