./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/conda.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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-fpi/conda.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 08:48:02,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 08:48:02,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 08:48:02,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 08:48:02,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 08:48:02,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 08:48:02,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 08:48:02,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 08:48:02,526 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 08:48:02,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 08:48:02,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 08:48:02,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 08:48:02,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 08:48:02,534 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 08:48:02,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 08:48:02,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 08:48:02,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 08:48:02,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 08:48:02,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 08:48:02,548 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 08:48:02,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 08:48:02,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 08:48:02,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 08:48:02,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 08:48:02,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 08:48:02,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 08:48:02,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 08:48:02,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 08:48:02,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 08:48:02,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 08:48:02,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 08:48:02,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 08:48:02,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 08:48:02,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 08:48:02,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 08:48:02,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 08:48:02,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 08:48:02,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 08:48:02,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 08:48:02,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 08:48:02,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 08:48:02,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 08:48:02,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 08:48:02,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 08:48:02,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 08:48:02,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 08:48:02,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 08:48:02,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 08:48:02,599 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 08:48:02,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 08:48:02,599 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 08:48:02,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 08:48:02,600 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 08:48:02,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 08:48:02,600 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 08:48:02,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 08:48:02,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 08:48:02,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 08:48:02,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 08:48:02,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 08:48:02,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 08:48:02,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 08:48:02,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 08:48:02,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 08:48:02,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 08:48:02,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 08:48:02,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:48:02,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 08:48:02,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 08:48:02,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 08:48:02,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 08:48:02,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 08:48:02,603 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 08:48:02,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 08:48:02,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 08:48:02,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 08:48:02,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4382625030c70271d5cb32641146c4ec68928c0500a545b71e51fae395fc6041 [2021-12-15 08:48:02,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 08:48:02,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 08:48:02,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 08:48:02,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 08:48:02,818 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 08:48:02,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/conda.c [2021-12-15 08:48:02,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94920c49/1a3720e4ec6547d2a39ef9a4c61d0a93/FLAG8c4d13b1f [2021-12-15 08:48:03,235 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 08:48:03,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/conda.c [2021-12-15 08:48:03,244 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94920c49/1a3720e4ec6547d2a39ef9a4c61d0a93/FLAG8c4d13b1f [2021-12-15 08:48:03,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a94920c49/1a3720e4ec6547d2a39ef9a4c61d0a93 [2021-12-15 08:48:03,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 08:48:03,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 08:48:03,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 08:48:03,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 08:48:03,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 08:48:03,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250574d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03, skipping insertion in model container [2021-12-15 08:48:03,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 08:48:03,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 08:48:03,408 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/conda.c[588,601] [2021-12-15 08:48:03,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:48:03,434 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 08:48:03,445 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/conda.c[588,601] [2021-12-15 08:48:03,462 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 08:48:03,471 INFO L208 MainTranslator]: Completed translation [2021-12-15 08:48:03,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03 WrapperNode [2021-12-15 08:48:03,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 08:48:03,473 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 08:48:03,473 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 08:48:03,473 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 08:48:03,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,511 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-12-15 08:48:03,511 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 08:48:03,512 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 08:48:03,512 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 08:48:03,512 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 08:48:03,518 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,522 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 08:48:03,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 08:48:03,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 08:48:03,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 08:48:03,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (1/1) ... [2021-12-15 08:48:03,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 08:48:03,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:03,572 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 08:48:03,590 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 08:48:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 08:48:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 08:48:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 08:48:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 08:48:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 08:48:03,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 08:48:03,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 08:48:03,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 08:48:03,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 08:48:03,654 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 08:48:03,655 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 08:48:03,801 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 08:48:03,805 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 08:48:03,805 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-15 08:48:03,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:48:03 BoogieIcfgContainer [2021-12-15 08:48:03,807 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 08:48:03,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 08:48:03,808 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 08:48:03,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 08:48:03,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:48:03" (1/3) ... [2021-12-15 08:48:03,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1e9203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:48:03, skipping insertion in model container [2021-12-15 08:48:03,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:48:03" (2/3) ... [2021-12-15 08:48:03,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c1e9203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:48:03, skipping insertion in model container [2021-12-15 08:48:03,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:48:03" (3/3) ... [2021-12-15 08:48:03,826 INFO L111 eAbstractionObserver]: Analyzing ICFG conda.c [2021-12-15 08:48:03,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 08:48:03,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 08:48:03,867 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 08:48:03,872 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 08:48:03,872 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 08:48:03,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:03,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:48:03,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:03,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:03,896 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:03,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:03,901 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-12-15 08:48:03,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:03,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629647734] [2021-12-15 08:48:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:03,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:04,035 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 08:48:04,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:04,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629647734] [2021-12-15 08:48:04,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629647734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:48:04,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:48:04,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 08:48:04,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795468937] [2021-12-15 08:48:04,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:48:04,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 08:48:04,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:04,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 08:48:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:48:04,068 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:04,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:04,080 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-12-15 08:48:04,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 08:48:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:48:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:04,086 INFO L225 Difference]: With dead ends: 40 [2021-12-15 08:48:04,086 INFO L226 Difference]: Without dead ends: 18 [2021-12-15 08:48:04,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 08:48:04,092 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:04,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:48:04,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-15 08:48:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-15 08:48:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-12-15 08:48:04,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-12-15 08:48:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:04,121 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-12-15 08:48:04,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:04,122 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-12-15 08:48:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 08:48:04,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:04,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:04,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 08:48:04,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-12-15 08:48:04,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:04,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954664660] [2021-12-15 08:48:04,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:04,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:04,229 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 08:48:04,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:04,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954664660] [2021-12-15 08:48:04,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954664660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 08:48:04,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 08:48:04,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 08:48:04,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574222750] [2021-12-15 08:48:04,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 08:48:04,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 08:48:04,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:04,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 08:48:04,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:48:04,234 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:04,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:04,291 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-12-15 08:48:04,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 08:48:04,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-15 08:48:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:04,296 INFO L225 Difference]: With dead ends: 36 [2021-12-15 08:48:04,296 INFO L226 Difference]: Without dead ends: 25 [2021-12-15 08:48:04,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 08:48:04,300 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:04,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 08:48:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-15 08:48:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-12-15 08:48:04,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:04,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-15 08:48:04,309 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-12-15 08:48:04,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:04,311 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-15 08:48:04,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-15 08:48:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 08:48:04,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:04,315 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:04,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 08:48:04,315 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:04,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-12-15 08:48:04,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:04,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510589949] [2021-12-15 08:48:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:04,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:04,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:04,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510589949] [2021-12-15 08:48:04,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510589949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:04,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965511258] [2021-12-15 08:48:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:04,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:04,840 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 08:48:04,843 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 08:48:04,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:04,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-15 08:48:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:04,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:48:05,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:05,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:05,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:05,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2021-12-15 08:48:05,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:05,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-12-15 08:48:05,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:05,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2021-12-15 08:48:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:05,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:05,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:48:05,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 44 [2021-12-15 08:48:05,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:48:05,848 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 38 [2021-12-15 08:48:05,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:05,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-15 08:48:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:05,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965511258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:05,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:05,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 30 [2021-12-15 08:48:05,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010210353] [2021-12-15 08:48:05,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:05,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-15 08:48:05,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-15 08:48:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-12-15 08:48:05,864 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 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 08:48:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:06,113 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-12-15 08:48:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-15 08:48:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 08:48:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:06,115 INFO L225 Difference]: With dead ends: 44 [2021-12-15 08:48:06,115 INFO L226 Difference]: Without dead ends: 39 [2021-12-15 08:48:06,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-12-15 08:48:06,117 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:06,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2021-12-15 08:48:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-15 08:48:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-12-15 08:48:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-12-15 08:48:06,121 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2021-12-15 08:48:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:06,121 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-12-15 08:48:06,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 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 08:48:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-12-15 08:48:06,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-15 08:48:06,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:06,122 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:06,154 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 08:48:06,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:06,323 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:06,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-12-15 08:48:06,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:06,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044912234] [2021-12-15 08:48:06,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:06,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:06,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:06,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044912234] [2021-12-15 08:48:06,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044912234] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:06,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952536490] [2021-12-15 08:48:06,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:06,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:06,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:06,422 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 08:48:06,424 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 08:48:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:06,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-15 08:48:06,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:06,485 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 18 treesize of output 14 [2021-12-15 08:48:06,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:48:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:06,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:06,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-15 08:48:06,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-12-15 08:48:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:06,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952536490] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:06,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:06,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-15 08:48:06,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474977024] [2021-12-15 08:48:06,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:06,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-15 08:48:06,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:06,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-15 08:48:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-15 08:48:06,587 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:06,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:06,669 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-12-15 08:48:06,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-15 08:48:06,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-15 08:48:06,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:06,670 INFO L225 Difference]: With dead ends: 49 [2021-12-15 08:48:06,670 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 08:48:06,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-15 08:48:06,671 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:06,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 08:48:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-15 08:48:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-12-15 08:48:06,675 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-12-15 08:48:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:06,675 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-12-15 08:48:06,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-12-15 08:48:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 08:48:06,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:06,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:06,704 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 08:48:06,891 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 08:48:06,891 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-12-15 08:48:06,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:06,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896381225] [2021-12-15 08:48:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:06,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:06,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896381225] [2021-12-15 08:48:06,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896381225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:06,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234093772] [2021-12-15 08:48:06,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:48:06,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:06,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:06,946 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 08:48:06,969 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 08:48:06,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:48:06,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:06,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:48:06,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:07,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:07,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234093772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:07,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:07,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 08:48:07,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539050672] [2021-12-15 08:48:07,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:07,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:48:07,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:48:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:48:07,071 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:07,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:07,146 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-12-15 08:48:07,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:48:07,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 08:48:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:07,148 INFO L225 Difference]: With dead ends: 70 [2021-12-15 08:48:07,149 INFO L226 Difference]: Without dead ends: 44 [2021-12-15 08:48:07,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-15 08:48:07,152 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:07,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 31 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-15 08:48:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-12-15 08:48:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-15 08:48:07,161 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-12-15 08:48:07,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:07,161 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-15 08:48:07,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-15 08:48:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-15 08:48:07,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:07,163 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:07,185 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 08:48:07,383 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 08:48:07,383 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-12-15 08:48:07,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:07,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060039447] [2021-12-15 08:48:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:07,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:07,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060039447] [2021-12-15 08:48:07,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060039447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550027220] [2021-12-15 08:48:07,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:48:07,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:07,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:07,421 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 08:48:07,422 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 08:48:07,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-15 08:48:07,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:07,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 08:48:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:07,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:07,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-15 08:48:07,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550027220] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:07,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:07,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-15 08:48:07,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790187028] [2021-12-15 08:48:07,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:07,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-15 08:48:07,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-15 08:48:07,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-15 08:48:07,581 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:07,677 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-15 08:48:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-15 08:48:07,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-15 08:48:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:07,679 INFO L225 Difference]: With dead ends: 39 [2021-12-15 08:48:07,679 INFO L226 Difference]: Without dead ends: 31 [2021-12-15 08:48:07,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-15 08:48:07,680 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:07,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 21 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:07,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-15 08:48:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-12-15 08:48:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:07,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-12-15 08:48:07,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-12-15 08:48:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:07,682 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-12-15 08:48:07,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-12-15 08:48:07,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:48:07,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:07,683 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:07,701 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 08:48:07,891 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 08:48:07,891 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:07,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-12-15 08:48:07,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:07,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124358230] [2021-12-15 08:48:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:07,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:07,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:08,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124358230] [2021-12-15 08:48:08,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124358230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182669268] [2021-12-15 08:48:08,404 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:48:08,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:08,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:08,406 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 08:48:08,407 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 08:48:08,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:48:08,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:08,453 WARN L261 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-15 08:48:08,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:08,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:48:08,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:08,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:08,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:08,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:08,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-15 08:48:08,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:08,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:08,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-12-15 08:48:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:08,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:08,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2021-12-15 08:48:09,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:09,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2021-12-15 08:48:09,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:09,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2021-12-15 08:48:09,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:09,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:09,900 INFO L354 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2021-12-15 08:48:09,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 1074 treesize of output 518 [2021-12-15 08:48:09,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:09,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-12-15 08:48:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:09,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-12-15 08:48:10,136 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (v_arrayElimArr_3 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 2 .cse0)) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|) (let ((.cse2 (* 2 ~N~0)) (.cse1 (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse0)))))) (and (<= .cse1 .cse2) (<= .cse2 .cse1))) (not (= 2 (select v_arrayElimArr_3 .cse6))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) ~N~0)))) is different from false [2021-12-15 08:48:10,264 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (v_arrayElimArr_3 (Array Int Int))) (let ((.cse0 (select v_arrayElimArr_3 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (or (not (= 2 .cse0)) (let ((.cse2 (* 2 ~N~0)) (.cse1 (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_arrayElimArr_3))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (+ .cse3 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse6) .cse0)))))) (and (<= .cse1 .cse2) (<= .cse2 .cse1))) (not (= 2 (select v_arrayElimArr_3 .cse6))) (<= ~N~0 (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< (+ |c_ULTIMATE.start_main_~i~0#1| 2) ~N~0)))) is different from false [2021-12-15 08:48:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-15 08:48:10,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182669268] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:10,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:10,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 50 [2021-12-15 08:48:10,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387472380] [2021-12-15 08:48:10,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:10,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-15 08:48:10,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-15 08:48:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1951, Unknown=2, NotChecked=186, Total=2450 [2021-12-15 08:48:10,398 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:13,934 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2021-12-15 08:48:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-15 08:48:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 08:48:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:13,935 INFO L225 Difference]: With dead ends: 77 [2021-12-15 08:48:13,935 INFO L226 Difference]: Without dead ends: 72 [2021-12-15 08:48:13,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=822, Invalid=4440, Unknown=2, NotChecked=286, Total=5550 [2021-12-15 08:48:13,937 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:13,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 118 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 687 Invalid, 0 Unknown, 90 Unchecked, 0.6s Time] [2021-12-15 08:48:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-15 08:48:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 44. [2021-12-15 08:48:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2021-12-15 08:48:13,941 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 27 [2021-12-15 08:48:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:13,942 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2021-12-15 08:48:13,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2021-12-15 08:48:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-15 08:48:13,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:13,943 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:13,960 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 08:48:14,160 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 08:48:14,161 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2021-12-15 08:48:14,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:14,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196463552] [2021-12-15 08:48:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:14,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:14,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:48:14,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196463552] [2021-12-15 08:48:14,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196463552] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:14,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555046820] [2021-12-15 08:48:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:14,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:14,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:14,273 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 08:48:14,274 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 08:48:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-15 08:48:14,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:14,356 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 13 treesize of output 9 [2021-12-15 08:48:14,389 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-15 08:48:14,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 08:48:14,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-15 08:48:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:48:14,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:14,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-15 08:48:14,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-15 08:48:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 08:48:14,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555046820] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:14,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:14,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 18 [2021-12-15 08:48:14,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908017043] [2021-12-15 08:48:14,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:14,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-15 08:48:14,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:14,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-15 08:48:14,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-12-15 08:48:14,521 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:14,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:14,706 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-12-15 08:48:14,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-15 08:48:14,707 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-15 08:48:14,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:14,707 INFO L225 Difference]: With dead ends: 63 [2021-12-15 08:48:14,707 INFO L226 Difference]: Without dead ends: 50 [2021-12-15 08:48:14,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-15 08:48:14,708 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:14,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-15 08:48:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2021-12-15 08:48:14,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2021-12-15 08:48:14,712 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 27 [2021-12-15 08:48:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:14,712 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2021-12-15 08:48:14,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2021-12-15 08:48:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-15 08:48:14,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:14,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:14,729 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 08:48:14,923 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 08:48:14,924 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-12-15 08:48:14,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540847236] [2021-12-15 08:48:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:14,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 08:48:14,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:14,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540847236] [2021-12-15 08:48:14,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540847236] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:14,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84500246] [2021-12-15 08:48:14,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-15 08:48:14,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:15,005 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 08:48:15,015 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 08:48:15,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-15 08:48:15,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:15,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:48:15,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 08:48:15,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-15 08:48:15,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84500246] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:15,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:15,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:48:15,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640492647] [2021-12-15 08:48:15,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:15,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:48:15,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:48:15,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:48:15,176 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:15,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:15,264 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2021-12-15 08:48:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-15 08:48:15,265 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-15 08:48:15,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:15,267 INFO L225 Difference]: With dead ends: 77 [2021-12-15 08:48:15,267 INFO L226 Difference]: Without dead ends: 43 [2021-12-15 08:48:15,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:48:15,270 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:15,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 27 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:15,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-15 08:48:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-15 08:48:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-12-15 08:48:15,279 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-12-15 08:48:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:15,280 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-12-15 08:48:15,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-12-15 08:48:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-15 08:48:15,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:15,281 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:15,297 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 08:48:15,483 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 08:48:15,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:15,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:15,484 INFO L85 PathProgramCache]: Analyzing trace with hash -863925553, now seen corresponding path program 6 times [2021-12-15 08:48:15,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:15,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560824195] [2021-12-15 08:48:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:15,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:48:15,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560824195] [2021-12-15 08:48:15,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560824195] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:15,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918189742] [2021-12-15 08:48:15,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-15 08:48:15,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:15,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:15,548 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 08:48:15,549 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 08:48:15,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-12-15 08:48:15,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:15,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-15 08:48:15,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:15,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:15,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:15,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918189742] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:15,726 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:15,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-12-15 08:48:15,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348347393] [2021-12-15 08:48:15,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:15,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-15 08:48:15,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-15 08:48:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-12-15 08:48:15,727 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:15,836 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-12-15 08:48:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-15 08:48:15,836 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-15 08:48:15,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:15,836 INFO L225 Difference]: With dead ends: 42 [2021-12-15 08:48:15,836 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 08:48:15,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-12-15 08:48:15,837 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:15,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 33 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:15,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 08:48:15,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-12-15 08:48:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-12-15 08:48:15,847 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 32 [2021-12-15 08:48:15,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:15,847 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-12-15 08:48:15,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:15,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-12-15 08:48:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 08:48:15,848 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:15,848 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:15,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:16,048 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 08:48:16,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:16,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2021-12-15 08:48:16,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:16,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205430742] [2021-12-15 08:48:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:16,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:16,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:16,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205430742] [2021-12-15 08:48:16,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205430742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:16,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221190804] [2021-12-15 08:48:16,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-15 08:48:16,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:16,951 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 08:48:16,952 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 08:48:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:16,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-15 08:48:17,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:17,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-15 08:48:17,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:48:17,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:17,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:17,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:17,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-15 08:48:17,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-15 08:48:17,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-12-15 08:48:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-12-15 08:48:17,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:17,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:17,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 49 [2021-12-15 08:48:17,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 45 [2021-12-15 08:48:17,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 38 [2021-12-15 08:48:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:18,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:20,280 INFO L354 Elim1Store]: treesize reduction 476, result has 26.2 percent of original size [2021-12-15 08:48:20,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 6 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 103640 treesize of output 31828 [2021-12-15 08:48:20,442 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-15 08:48:20,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:48:20,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-12-15 08:48:20,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154441798] [2021-12-15 08:48:20,442 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:20,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-15 08:48:20,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-15 08:48:20,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=3116, Unknown=0, NotChecked=0, Total=3540 [2021-12-15 08:48:20,444 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:22,136 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2021-12-15 08:48:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-15 08:48:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 08:48:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:22,137 INFO L225 Difference]: With dead ends: 71 [2021-12-15 08:48:22,137 INFO L226 Difference]: Without dead ends: 67 [2021-12-15 08:48:22,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=817, Invalid=5663, Unknown=0, NotChecked=0, Total=6480 [2021-12-15 08:48:22,139 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:22,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 82 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 08:48:22,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-15 08:48:22,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-12-15 08:48:22,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 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 08:48:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-15 08:48:22,150 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 34 [2021-12-15 08:48:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:22,150 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-15 08:48:22,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:22,150 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-15 08:48:22,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-15 08:48:22,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:22,155 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:22,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:22,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:22,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:22,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:22,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2021-12-15 08:48:22,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:22,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245825876] [2021-12-15 08:48:22,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:22,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:22,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:22,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245825876] [2021-12-15 08:48:22,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245825876] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:22,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619828274] [2021-12-15 08:48:22,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:48:22,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:22,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:22,466 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:48:22,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-15 08:48:22,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:48:22,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:22,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 08:48:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:22,579 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 13 treesize of output 9 [2021-12-15 08:48:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:22,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 08:48:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:22,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-15 08:48:22,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-15 08:48:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:22,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:22,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-15 08:48:22,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-12-15 08:48:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:22,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619828274] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:22,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:22,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2021-12-15 08:48:22,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973614671] [2021-12-15 08:48:22,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:22,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-15 08:48:22,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:22,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-15 08:48:22,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-12-15 08:48:22,797 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:22,916 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-12-15 08:48:22,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-15 08:48:22,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-15 08:48:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:22,917 INFO L225 Difference]: With dead ends: 74 [2021-12-15 08:48:22,917 INFO L226 Difference]: Without dead ends: 59 [2021-12-15 08:48:22,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-12-15 08:48:22,918 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:22,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 63 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:22,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-15 08:48:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2021-12-15 08:48:22,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 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 08:48:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2021-12-15 08:48:22,921 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 34 [2021-12-15 08:48:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:22,921 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2021-12-15 08:48:22,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2021-12-15 08:48:22,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 08:48:22,922 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:22,922 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:22,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:23,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 08:48:23,133 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 8 times [2021-12-15 08:48:23,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:23,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207130823] [2021-12-15 08:48:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:23,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:23,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:23,202 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:48:23,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:23,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207130823] [2021-12-15 08:48:23,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207130823] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:23,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409458066] [2021-12-15 08:48:23,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 08:48:23,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:23,204 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:48:23,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-15 08:48:23,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 08:48:23,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:23,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:48:23,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:48:23,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-15 08:48:23,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409458066] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:23,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:23,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:48:23,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327331506] [2021-12-15 08:48:23,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:23,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:48:23,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:48:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:48:23,422 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:23,541 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2021-12-15 08:48:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-15 08:48:23,542 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-15 08:48:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:23,542 INFO L225 Difference]: With dead ends: 96 [2021-12-15 08:48:23,542 INFO L226 Difference]: Without dead ends: 62 [2021-12-15 08:48:23,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-12-15 08:48:23,544 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 119 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:23,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 30 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-15 08:48:23,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-12-15 08:48:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-15 08:48:23,548 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 36 [2021-12-15 08:48:23,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:23,548 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-15 08:48:23,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:23,548 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-15 08:48:23,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-15 08:48:23,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:23,549 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:23,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:23,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 08:48:23,764 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1466624367, now seen corresponding path program 9 times [2021-12-15 08:48:23,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:23,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499211769] [2021-12-15 08:48:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:23,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:23,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499211769] [2021-12-15 08:48:23,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499211769] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828416450] [2021-12-15 08:48:23,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:48:23,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:23,824 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:48:23,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-15 08:48:23,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 08:48:23,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:23,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-15 08:48:23,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:23,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:24,049 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:24,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828416450] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:48:24,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:48:24,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-12-15 08:48:24,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850976720] [2021-12-15 08:48:24,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:24,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-15 08:48:24,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-15 08:48:24,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-12-15 08:48:24,051 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 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 08:48:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:24,200 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-12-15 08:48:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-15 08:48:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-12-15 08:48:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:24,201 INFO L225 Difference]: With dead ends: 57 [2021-12-15 08:48:24,201 INFO L226 Difference]: Without dead ends: 45 [2021-12-15 08:48:24,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-12-15 08:48:24,203 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:24,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 08:48:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-15 08:48:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-12-15 08:48:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 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 08:48:24,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-12-15 08:48:24,206 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 36 [2021-12-15 08:48:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:24,206 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-12-15 08:48:24,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 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 08:48:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-12-15 08:48:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 08:48:24,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:24,209 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:24,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:24,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-15 08:48:24,415 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:24,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 10 times [2021-12-15 08:48:24,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:24,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531869229] [2021-12-15 08:48:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:24,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:25,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531869229] [2021-12-15 08:48:25,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531869229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875479184] [2021-12-15 08:48:25,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-15 08:48:25,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:25,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:25,793 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:48:25,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-15 08:48:25,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-15 08:48:25,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:25,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-15 08:48:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:25,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-15 08:48:25,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:25,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:25,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:25,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:26,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:26,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-15 08:48:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2021-12-15 08:48:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2021-12-15 08:48:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2021-12-15 08:48:26,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2021-12-15 08:48:26,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:26,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:26,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-12-15 08:48:27,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:27,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-12-15 08:48:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-15 08:48:27,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 61 [2021-12-15 08:48:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2021-12-15 08:48:27,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-15 08:48:27,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 36 [2021-12-15 08:48:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 08:48:27,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:48:36,328 INFO L354 Elim1Store]: treesize reduction 3907, result has 18.3 percent of original size [2021-12-15 08:48:36,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 23 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 27 new quantified variables, introduced 190 case distinctions, treesize of input 10639422 treesize of output 2351496 [2021-12-15 08:48:41,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-15 08:48:41,201 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-15 08:48:41,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-12-15 08:48:41,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988314126] [2021-12-15 08:48:41,202 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-15 08:48:41,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-15 08:48:41,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:48:41,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-15 08:48:41,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=742, Invalid=5900, Unknown=0, NotChecked=0, Total=6642 [2021-12-15 08:48:41,204 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 08:48:44,385 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2021-12-15 08:48:44,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-15 08:48:44,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-15 08:48:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 08:48:44,386 INFO L225 Difference]: With dead ends: 88 [2021-12-15 08:48:44,386 INFO L226 Difference]: Without dead ends: 84 [2021-12-15 08:48:44,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4228 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1490, Invalid=11850, Unknown=0, NotChecked=0, Total=13340 [2021-12-15 08:48:44,389 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 08:48:44,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 91 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 08:48:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-15 08:48:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-12-15 08:48:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 states have internal predecessors, (72), 0 states have call successors, (0), 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 08:48:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-12-15 08:48:44,393 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 41 [2021-12-15 08:48:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 08:48:44,394 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-12-15 08:48:44,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 08:48:44,394 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-12-15 08:48:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-15 08:48:44,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 08:48:44,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 08:48:44,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-15 08:48:44,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 08:48:44,607 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 08:48:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 08:48:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash 97262195, now seen corresponding path program 3 times [2021-12-15 08:48:44,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 08:48:44,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552617885] [2021-12-15 08:48:44,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 08:48:44,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 08:48:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 08:48:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-15 08:48:44,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 08:48:44,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552617885] [2021-12-15 08:48:44,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552617885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 08:48:44,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603220629] [2021-12-15 08:48:44,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-15 08:48:44,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 08:48:44,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 08:48:44,887 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 08:48:44,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-15 08:48:44,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-15 08:48:44,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 08:48:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-15 08:48:44,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 08:48:44,996 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 08:48:45,624 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-15 08:48:45,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2021-12-15 08:48:45,746 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-15 08:48:45,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 48 [2021-12-15 08:48:45,826 INFO L354 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2021-12-15 08:48:45,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 38 [2021-12-15 08:48:45,930 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-15 08:48:45,931 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 32 treesize of output 32 [2021-12-15 08:48:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 23 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:48:46,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 08:49:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 23 proven. 20 refuted. 2 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 08:49:12,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603220629] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 08:49:12,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 08:49:12,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 18] total 48 [2021-12-15 08:49:12,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517234544] [2021-12-15 08:49:12,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 08:49:12,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-15 08:49:12,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 08:49:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-15 08:49:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1803, Unknown=26, NotChecked=0, Total=2256 [2021-12-15 08:49:12,350 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 48 states, 48 states have (on average 1.8333333333333333) internal successors, (88), 48 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)