./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/verifythis/tree_max.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 e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-14 01:34:11,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 01:34:11,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 01:34:11,454 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 01:34:11,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 01:34:11,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 01:34:11,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 01:34:11,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 01:34:11,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 01:34:11,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 01:34:11,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 01:34:11,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 01:34:11,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 01:34:11,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 01:34:11,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 01:34:11,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 01:34:11,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 01:34:11,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 01:34:11,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 01:34:11,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 01:34:11,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 01:34:11,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 01:34:11,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 01:34:11,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 01:34:11,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 01:34:11,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 01:34:11,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 01:34:11,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 01:34:11,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 01:34:11,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 01:34:11,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 01:34:11,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 01:34:11,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 01:34:11,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 01:34:11,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 01:34:11,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 01:34:11,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 01:34:11,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 01:34:11,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 01:34:11,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 01:34:11,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 01:34:11,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 01:34:11,539 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 01:34:11,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 01:34:11,540 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 01:34:11,540 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 01:34:11,541 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 01:34:11,541 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 01:34:11,542 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 01:34:11,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 01:34:11,542 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 01:34:11,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 01:34:11,543 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 01:34:11,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 01:34:11,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 01:34:11,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 01:34:11,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 01:34:11,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 01:34:11,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 01:34:11,545 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 01:34:11,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 01:34:11,545 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 01:34:11,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 01:34:11,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 01:34:11,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 01:34:11,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 01:34:11,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:34:11,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 01:34:11,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 01:34:11,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 01:34:11,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 01:34:11,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 01:34:11,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 01:34:11,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 01:34:11,548 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 01:34:11,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 01:34:11,548 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 01:34:11,555 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2023-02-14 01:34:11,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 01:34:11,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 01:34:11,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 01:34:11,810 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 01:34:11,810 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 01:34:11,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2023-02-14 01:34:13,137 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 01:34:13,299 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 01:34:13,299 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2023-02-14 01:34:13,303 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386465f27/789cd5cc722d458790e03e72c806fef6/FLAG34046411e [2023-02-14 01:34:13,313 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386465f27/789cd5cc722d458790e03e72c806fef6 [2023-02-14 01:34:13,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 01:34:13,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 01:34:13,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 01:34:13,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 01:34:13,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 01:34:13,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3f4372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13, skipping insertion in model container [2023-02-14 01:34:13,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 01:34:13,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 01:34:13,452 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2023-02-14 01:34:13,464 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:34:13,475 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 01:34:13,485 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2023-02-14 01:34:13,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 01:34:13,503 INFO L208 MainTranslator]: Completed translation [2023-02-14 01:34:13,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13 WrapperNode [2023-02-14 01:34:13,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 01:34:13,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 01:34:13,504 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 01:34:13,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 01:34:13,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,530 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2023-02-14 01:34:13,533 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 01:34:13,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 01:34:13,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 01:34:13,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 01:34:13,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,573 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 01:34:13,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 01:34:13,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 01:34:13,584 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 01:34:13,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (1/1) ... [2023-02-14 01:34:13,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 01:34:13,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:13,620 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) [2023-02-14 01:34:13,638 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 [2023-02-14 01:34:13,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 01:34:13,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 01:34:13,654 INFO L130 BoogieDeclarations]: Found specification of procedure max [2023-02-14 01:34:13,654 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2023-02-14 01:34:13,654 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2023-02-14 01:34:13,655 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2023-02-14 01:34:13,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 01:34:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-02-14 01:34:13,656 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-02-14 01:34:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 01:34:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 01:34:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 01:34:13,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 01:34:13,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 01:34:13,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 01:34:13,743 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 01:34:13,745 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 01:34:13,972 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 01:34:13,986 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 01:34:13,991 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-14 01:34:13,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:34:13 BoogieIcfgContainer [2023-02-14 01:34:13,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 01:34:13,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 01:34:13,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 01:34:14,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 01:34:14,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 01:34:13" (1/3) ... [2023-02-14 01:34:14,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cd1425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:34:14, skipping insertion in model container [2023-02-14 01:34:14,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 01:34:13" (2/3) ... [2023-02-14 01:34:14,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76cd1425 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 01:34:14, skipping insertion in model container [2023-02-14 01:34:14,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 01:34:13" (3/3) ... [2023-02-14 01:34:14,003 INFO L112 eAbstractionObserver]: Analyzing ICFG tree_max.c [2023-02-14 01:34:14,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 01:34:14,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 01:34:14,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 01:34:14,082 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@38e136f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 01:34:14,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 01:34:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 01:34:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-14 01:34:14,093 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:14,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:14,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:14,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:14,102 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2023-02-14 01:34:14,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:14,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550020323] [2023-02-14 01:34:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:14,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:14,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:14,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:14,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-14 01:34:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 01:34:14,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:14,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550020323] [2023-02-14 01:34:14,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550020323] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:34:14,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:34:14,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 01:34:14,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789954534] [2023-02-14 01:34:14,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:34:14,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 01:34:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:14,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 01:34:14,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 01:34:14,762 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:34:15,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:15,152 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2023-02-14 01:34:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 01:34:15,155 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-14 01:34:15,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:15,163 INFO L225 Difference]: With dead ends: 74 [2023-02-14 01:34:15,163 INFO L226 Difference]: Without dead ends: 35 [2023-02-14 01:34:15,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-02-14 01:34:15,174 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:15,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 100 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:34:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-14 01:34:15,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-14 01:34:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-14 01:34:15,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2023-02-14 01:34:15,224 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2023-02-14 01:34:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:15,225 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2023-02-14 01:34:15,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-14 01:34:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2023-02-14 01:34:15,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 01:34:15,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:15,230 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:15,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 01:34:15,230 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2023-02-14 01:34:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:15,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086801968] [2023-02-14 01:34:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:15,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:15,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:15,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:34:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:15,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:34:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:15,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 01:34:15,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:15,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086801968] [2023-02-14 01:34:15,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086801968] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 01:34:15,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 01:34:15,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-14 01:34:15,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258055675] [2023-02-14 01:34:15,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 01:34:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 01:34:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:15,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 01:34:15,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-02-14 01:34:15,606 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 01:34:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:15,839 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2023-02-14 01:34:15,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 01:34:15,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-02-14 01:34:15,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:15,841 INFO L225 Difference]: With dead ends: 48 [2023-02-14 01:34:15,841 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 01:34:15,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-02-14 01:34:15,843 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:15,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 01:34:15,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 01:34:15,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-14 01:34:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 01:34:15,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2023-02-14 01:34:15,851 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2023-02-14 01:34:15,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:15,852 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2023-02-14 01:34:15,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-14 01:34:15,853 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2023-02-14 01:34:15,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 01:34:15,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:15,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:15,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 01:34:15,856 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:15,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2023-02-14 01:34:15,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:15,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553002786] [2023-02-14 01:34:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:15,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:16,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:16,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:34:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:16,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:34:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:16,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:16,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:16,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:34:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:16,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:34:16,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:16,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553002786] [2023-02-14 01:34:16,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553002786] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319018597] [2023-02-14 01:34:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:16,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:16,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:16,544 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) [2023-02-14 01:34:16,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 01:34:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:16,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-14 01:34:16,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:16,899 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:34:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 01:34:16,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:17,056 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-02-14 01:34:17,057 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2023-02-14 01:34:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:34:17,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319018597] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:34:17,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:34:17,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2023-02-14 01:34:17,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259628710] [2023-02-14 01:34:17,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:17,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 01:34:17,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 01:34:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-02-14 01:34:17,088 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-14 01:34:17,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:17,589 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-14 01:34:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 01:34:17,590 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2023-02-14 01:34:17,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:17,594 INFO L225 Difference]: With dead ends: 46 [2023-02-14 01:34:17,595 INFO L226 Difference]: Without dead ends: 44 [2023-02-14 01:34:17,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 01:34:17,598 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:17,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 153 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 01:34:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-14 01:34:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2023-02-14 01:34:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2023-02-14 01:34:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2023-02-14 01:34:17,608 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2023-02-14 01:34:17,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:17,609 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2023-02-14 01:34:17,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 16 states have internal predecessors, (37), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-14 01:34:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2023-02-14 01:34:17,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 01:34:17,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:17,611 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:17,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 01:34:17,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:17,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:17,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2023-02-14 01:34:17,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:17,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990989691] [2023-02-14 01:34:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:17,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:18,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:18,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:34:18,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:18,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:34:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:18,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:18,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:18,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:34:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-14 01:34:18,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:18,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990989691] [2023-02-14 01:34:18,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990989691] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:18,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402033128] [2023-02-14 01:34:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:18,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:18,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:18,478 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) [2023-02-14 01:34:18,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 01:34:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:18,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-14 01:34:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:18,604 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:34:18,607 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:34:18,856 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:34:18,860 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:34:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 01:34:18,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:27,216 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:34:33,297 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:34:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 01:34:33,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402033128] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:34:33,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:34:33,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 13] total 29 [2023-02-14 01:34:33,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097443452] [2023-02-14 01:34:33,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:33,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 01:34:33,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:33,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 01:34:33,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=732, Unknown=1, NotChecked=0, Total=812 [2023-02-14 01:34:33,391 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-02-14 01:34:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:34,633 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2023-02-14 01:34:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 01:34:34,634 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 47 [2023-02-14 01:34:34,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:34,635 INFO L225 Difference]: With dead ends: 72 [2023-02-14 01:34:34,635 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 01:34:34,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=255, Invalid=2000, Unknown=1, NotChecked=0, Total=2256 [2023-02-14 01:34:34,637 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:34,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 287 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 01:34:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 01:34:34,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2023-02-14 01:34:34,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.225) internal successors, (49), 43 states have internal predecessors, (49), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2023-02-14 01:34:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2023-02-14 01:34:34,648 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 47 [2023-02-14 01:34:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:34,649 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2023-02-14 01:34:34,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 11 states have call successors, (19), 6 states have call predecessors, (19), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2023-02-14 01:34:34,649 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2023-02-14 01:34:34,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-14 01:34:34,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:34,651 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:34,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 01:34:34,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-14 01:34:34,856 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:34,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:34,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2023-02-14 01:34:34,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:34,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588842534] [2023-02-14 01:34:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:34,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:35,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:35,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:35,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:34:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:35,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:34:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:35,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:34:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:35,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:35,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:34:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 01:34:35,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:35,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588842534] [2023-02-14 01:34:35,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588842534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:35,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869900503] [2023-02-14 01:34:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:35,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:35,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:35,415 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) [2023-02-14 01:34:35,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 01:34:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:35,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-14 01:34:35,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:35,524 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:34:35,527 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:34:35,743 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:34:35,745 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:34:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 01:34:35,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:44,074 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:34:50,141 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:34:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 01:34:50,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869900503] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:34:50,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:34:50,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 13] total 28 [2023-02-14 01:34:50,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177973618] [2023-02-14 01:34:50,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:50,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-14 01:34:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-14 01:34:50,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=686, Unknown=1, NotChecked=0, Total=756 [2023-02-14 01:34:50,265 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-14 01:34:51,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:51,259 INFO L93 Difference]: Finished difference Result 147 states and 211 transitions. [2023-02-14 01:34:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 01:34:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 47 [2023-02-14 01:34:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:51,267 INFO L225 Difference]: With dead ends: 147 [2023-02-14 01:34:51,267 INFO L226 Difference]: Without dead ends: 91 [2023-02-14 01:34:51,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=212, Invalid=1949, Unknown=1, NotChecked=0, Total=2162 [2023-02-14 01:34:51,269 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:51,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 208 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 01:34:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-14 01:34:51,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2023-02-14 01:34:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 63 states have internal predecessors, (75), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (37), 15 states have call predecessors, (37), 11 states have call successors, (37) [2023-02-14 01:34:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 128 transitions. [2023-02-14 01:34:51,300 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 128 transitions. Word has length 47 [2023-02-14 01:34:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:51,302 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 128 transitions. [2023-02-14 01:34:51,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.375) internal successors, (57), 21 states have internal predecessors, (57), 10 states have call successors, (20), 5 states have call predecessors, (20), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-02-14 01:34:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 128 transitions. [2023-02-14 01:34:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 01:34:51,308 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:51,309 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:51,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 01:34:51,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:51,514 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 2 times [2023-02-14 01:34:51,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:51,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716156599] [2023-02-14 01:34:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:51,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:34:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:34:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:34:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:34:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:34:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:34:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:52,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:53,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:34:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 01:34:53,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:53,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716156599] [2023-02-14 01:34:53,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716156599] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:53,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998242801] [2023-02-14 01:34:53,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:34:53,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:53,017 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) [2023-02-14 01:34:53,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 01:34:53,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:34:53,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:34:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-14 01:34:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:53,181 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:34:53,184 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:34:53,805 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 17 [2023-02-14 01:34:53,808 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2023-02-14 01:34:53,945 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-02-14 01:34:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 01:34:53,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:54,600 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:34:54,600 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 34 [2023-02-14 01:34:54,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998242801] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:54,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:34:54,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 47 [2023-02-14 01:34:54,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247786402] [2023-02-14 01:34:54,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:54,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-14 01:34:54,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:54,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-14 01:34:54,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3142, Unknown=0, NotChecked=0, Total=3306 [2023-02-14 01:34:54,848 INFO L87 Difference]: Start difference. First operand 88 states and 128 transitions. Second operand has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 01:34:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:34:57,573 INFO L93 Difference]: Finished difference Result 164 states and 307 transitions. [2023-02-14 01:34:57,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-14 01:34:57,574 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 70 [2023-02-14 01:34:57,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:34:57,577 INFO L225 Difference]: With dead ends: 164 [2023-02-14 01:34:57,577 INFO L226 Difference]: Without dead ends: 162 [2023-02-14 01:34:57,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=546, Invalid=7110, Unknown=0, NotChecked=0, Total=7656 [2023-02-14 01:34:57,580 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 2077 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 2192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-14 01:34:57,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 333 Invalid, 2192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2077 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-14 01:34:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-14 01:34:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 135. [2023-02-14 01:34:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 96 states have (on average 1.21875) internal successors, (117), 99 states have internal predecessors, (117), 21 states have call successors, (21), 11 states have call predecessors, (21), 17 states have return successors, (99), 24 states have call predecessors, (99), 13 states have call successors, (99) [2023-02-14 01:34:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 237 transitions. [2023-02-14 01:34:57,608 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 237 transitions. Word has length 70 [2023-02-14 01:34:57,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:34:57,609 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 237 transitions. [2023-02-14 01:34:57,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 34 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 01:34:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 237 transitions. [2023-02-14 01:34:57,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 01:34:57,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:34:57,611 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:34:57,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 01:34:57,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:57,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:34:57,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:34:57,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1209697001, now seen corresponding path program 2 times [2023-02-14 01:34:57,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:34:57,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246994191] [2023-02-14 01:34:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:34:57,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:34:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:34:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:34:58,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:34:58,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:34:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:34:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:58,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:34:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:34:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 01:34:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:34:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 01:34:58,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:34:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246994191] [2023-02-14 01:34:58,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246994191] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:34:58,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331767849] [2023-02-14 01:34:58,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:34:58,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:34:58,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:34:58,461 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) [2023-02-14 01:34:58,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 01:34:58,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:34:58,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:34:58,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-14 01:34:58,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:34:58,655 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:34:58,865 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 01:34:58,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:34:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 01:34:59,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331767849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:34:59,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:34:59,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 30 [2023-02-14 01:34:59,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028324797] [2023-02-14 01:34:59,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:34:59,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 01:34:59,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:34:59,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 01:34:59,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-02-14 01:34:59,294 INFO L87 Difference]: Start difference. First operand 135 states and 237 transitions. Second operand has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2023-02-14 01:35:01,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:35:03,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:35:06,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:35:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:06,987 INFO L93 Difference]: Finished difference Result 232 states and 410 transitions. [2023-02-14 01:35:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 01:35:06,988 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) Word has length 70 [2023-02-14 01:35:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:06,993 INFO L225 Difference]: With dead ends: 232 [2023-02-14 01:35:06,993 INFO L226 Difference]: Without dead ends: 216 [2023-02-14 01:35:06,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=1968, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 01:35:06,995 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 133 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 88 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:06,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 334 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1125 Invalid, 4 Unknown, 0 Unchecked, 7.2s Time] [2023-02-14 01:35:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-02-14 01:35:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 150. [2023-02-14 01:35:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.2358490566037736) internal successors, (131), 110 states have internal predecessors, (131), 24 states have call successors, (24), 13 states have call predecessors, (24), 19 states have return successors, (87), 26 states have call predecessors, (87), 16 states have call successors, (87) [2023-02-14 01:35:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 242 transitions. [2023-02-14 01:35:07,032 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 242 transitions. Word has length 70 [2023-02-14 01:35:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:07,032 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 242 transitions. [2023-02-14 01:35:07,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2023-02-14 01:35:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 242 transitions. [2023-02-14 01:35:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-14 01:35:07,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:07,036 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:07,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:07,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:07,241 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:07,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:07,242 INFO L85 PathProgramCache]: Analyzing trace with hash -666655302, now seen corresponding path program 3 times [2023-02-14 01:35:07,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:07,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533216309] [2023-02-14 01:35:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:07,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 01:35:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:07,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 01:35:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-14 01:35:07,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:07,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533216309] [2023-02-14 01:35:07,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533216309] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:07,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215093407] [2023-02-14 01:35:07,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:35:07,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:07,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:07,841 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) [2023-02-14 01:35:07,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 01:35:07,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 01:35:07,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:35:07,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-14 01:35:07,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:07,998 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:08,002 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:08,025 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 18 [2023-02-14 01:35:08,029 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 18 [2023-02-14 01:35:08,234 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:08,236 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-14 01:35:08,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:35:08,721 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-14 01:35:08,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215093407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:35:08,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:35:08,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 25 [2023-02-14 01:35:08,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943724040] [2023-02-14 01:35:08,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:35:08,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 01:35:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:35:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 01:35:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2023-02-14 01:35:08,723 INFO L87 Difference]: Start difference. First operand 150 states and 242 transitions. Second operand has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2023-02-14 01:35:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:09,586 INFO L93 Difference]: Finished difference Result 311 states and 504 transitions. [2023-02-14 01:35:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 01:35:09,586 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 60 [2023-02-14 01:35:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:09,589 INFO L225 Difference]: With dead ends: 311 [2023-02-14 01:35:09,589 INFO L226 Difference]: Without dead ends: 259 [2023-02-14 01:35:09,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 01:35:09,591 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:09,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 219 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 01:35:09,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-14 01:35:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 159. [2023-02-14 01:35:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 116 states have internal predecessors, (137), 26 states have call successors, (26), 14 states have call predecessors, (26), 21 states have return successors, (97), 28 states have call predecessors, (97), 18 states have call successors, (97) [2023-02-14 01:35:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 260 transitions. [2023-02-14 01:35:09,626 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 260 transitions. Word has length 60 [2023-02-14 01:35:09,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:09,627 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 260 transitions. [2023-02-14 01:35:09,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.217391304347826) internal successors, (51), 17 states have internal predecessors, (51), 8 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2023-02-14 01:35:09,627 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 260 transitions. [2023-02-14 01:35:09,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 01:35:09,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:09,631 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:09,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:09,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:09,838 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2023-02-14 01:35:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:09,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578898212] [2023-02-14 01:35:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:09,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:10,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:10,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:10,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:10,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:10,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:35:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:11,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:11,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:11,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:11,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 01:35:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:11,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578898212] [2023-02-14 01:35:11,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578898212] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:11,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005353662] [2023-02-14 01:35:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:11,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:11,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:11,273 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) [2023-02-14 01:35:11,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 01:35:11,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:11,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-14 01:35:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:11,942 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 17 [2023-02-14 01:35:11,944 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2023-02-14 01:35:12,098 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-02-14 01:35:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 01:35:12,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:35:12,681 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 01:35:12,681 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 30 [2023-02-14 01:35:12,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005353662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:12,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:35:12,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22] total 45 [2023-02-14 01:35:12,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560342556] [2023-02-14 01:35:12,881 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:35:12,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-14 01:35:12,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:35:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-14 01:35:12,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2719, Unknown=0, NotChecked=0, Total=2862 [2023-02-14 01:35:12,883 INFO L87 Difference]: Start difference. First operand 159 states and 260 transitions. Second operand has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 01:35:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:17,715 INFO L93 Difference]: Finished difference Result 324 states and 630 transitions. [2023-02-14 01:35:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-14 01:35:17,717 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2023-02-14 01:35:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:17,720 INFO L225 Difference]: With dead ends: 324 [2023-02-14 01:35:17,720 INFO L226 Difference]: Without dead ends: 322 [2023-02-14 01:35:17,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=891, Invalid=11099, Unknown=0, NotChecked=0, Total=11990 [2023-02-14 01:35:17,724 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 198 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:17,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 368 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-14 01:35:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-02-14 01:35:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 175. [2023-02-14 01:35:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 122 states have (on average 1.2459016393442623) internal successors, (152), 130 states have internal predecessors, (152), 26 states have call successors, (26), 14 states have call predecessors, (26), 26 states have return successors, (126), 30 states have call predecessors, (126), 18 states have call successors, (126) [2023-02-14 01:35:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 304 transitions. [2023-02-14 01:35:17,760 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 304 transitions. Word has length 71 [2023-02-14 01:35:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:17,761 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 304 transitions. [2023-02-14 01:35:17,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 32 states have internal predecessors, (66), 16 states have call successors, (22), 6 states have call predecessors, (22), 8 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 01:35:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 304 transitions. [2023-02-14 01:35:17,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 01:35:17,763 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:17,763 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:17,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:17,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:17,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:17,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:17,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2023-02-14 01:35:17,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:17,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183786682] [2023-02-14 01:35:17,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:17,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:35:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 01:35:18,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:18,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183786682] [2023-02-14 01:35:18,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183786682] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:18,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118178175] [2023-02-14 01:35:18,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:35:18,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:18,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:18,271 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) [2023-02-14 01:35:18,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 01:35:18,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:35:18,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:35:18,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 01:35:18,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 01:35:18,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:35:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 01:35:18,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118178175] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:35:18,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:35:18,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2023-02-14 01:35:18,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007683289] [2023-02-14 01:35:18,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:35:18,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 01:35:18,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:35:18,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 01:35:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2023-02-14 01:35:18,936 INFO L87 Difference]: Start difference. First operand 175 states and 304 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 01:35:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:19,881 INFO L93 Difference]: Finished difference Result 377 states and 809 transitions. [2023-02-14 01:35:19,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-14 01:35:19,882 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2023-02-14 01:35:19,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:19,885 INFO L225 Difference]: With dead ends: 377 [2023-02-14 01:35:19,885 INFO L226 Difference]: Without dead ends: 243 [2023-02-14 01:35:19,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 152 SyntacticMatches, 11 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2023-02-14 01:35:19,887 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 113 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:19,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 200 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 01:35:19,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-02-14 01:35:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 202. [2023-02-14 01:35:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 148 states have internal predecessors, (171), 28 states have call successors, (28), 14 states have call predecessors, (28), 30 states have return successors, (156), 39 states have call predecessors, (156), 20 states have call successors, (156) [2023-02-14 01:35:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 355 transitions. [2023-02-14 01:35:19,923 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 355 transitions. Word has length 71 [2023-02-14 01:35:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:19,924 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 355 transitions. [2023-02-14 01:35:19,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-14 01:35:19,925 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 355 transitions. [2023-02-14 01:35:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 01:35:19,930 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:19,931 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:19,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:20,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 01:35:20,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:20,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:20,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2023-02-14 01:35:20,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:20,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751622339] [2023-02-14 01:35:20,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:20,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:20,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:20,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:20,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:21,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:35:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 01:35:21,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751622339] [2023-02-14 01:35:21,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751622339] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996585389] [2023-02-14 01:35:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:21,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:21,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:21,598 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) [2023-02-14 01:35:21,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 01:35:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:21,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-14 01:35:21,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:22,526 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 17 [2023-02-14 01:35:22,528 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2023-02-14 01:35:22,681 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-02-14 01:35:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 01:35:22,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:35:23,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:35:23,646 INFO L350 Elim1Store]: Elim1 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 35 treesize of output 38 [2023-02-14 01:35:24,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996585389] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:24,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:35:24,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2023-02-14 01:35:24,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666740477] [2023-02-14 01:35:24,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:35:24,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 01:35:24,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:35:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 01:35:24,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2023-02-14 01:35:24,330 INFO L87 Difference]: Start difference. First operand 202 states and 355 transitions. Second operand has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 01:35:27,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:27,671 INFO L93 Difference]: Finished difference Result 254 states and 446 transitions. [2023-02-14 01:35:27,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-14 01:35:27,672 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 72 [2023-02-14 01:35:27,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:27,674 INFO L225 Difference]: With dead ends: 254 [2023-02-14 01:35:27,675 INFO L226 Difference]: Without dead ends: 252 [2023-02-14 01:35:27,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=739, Invalid=10181, Unknown=0, NotChecked=0, Total=10920 [2023-02-14 01:35:27,678 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 180 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:27,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 358 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-14 01:35:27,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-14 01:35:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 197. [2023-02-14 01:35:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 139 states have (on average 1.1942446043165467) internal successors, (166), 144 states have internal predecessors, (166), 28 states have call successors, (28), 14 states have call predecessors, (28), 29 states have return successors, (150), 38 states have call predecessors, (150), 20 states have call successors, (150) [2023-02-14 01:35:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 344 transitions. [2023-02-14 01:35:27,703 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 344 transitions. Word has length 72 [2023-02-14 01:35:27,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:27,703 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 344 transitions. [2023-02-14 01:35:27,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2023-02-14 01:35:27,704 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 344 transitions. [2023-02-14 01:35:27,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 01:35:27,705 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:27,706 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:27,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:27,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:27,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:27,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:27,912 INFO L85 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2023-02-14 01:35:27,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:27,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949225674] [2023-02-14 01:35:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:27,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:28,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:28,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:28,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:28,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:28,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:35:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:29,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:29,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:29,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:29,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:29,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 01:35:29,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:29,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949225674] [2023-02-14 01:35:29,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949225674] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:29,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931240539] [2023-02-14 01:35:29,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:29,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:29,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:29,293 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) [2023-02-14 01:35:29,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 01:35:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:29,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-14 01:35:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:29,479 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:35:29,481 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:35:29,881 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 15 [2023-02-14 01:35:29,883 INFO L350 Elim1Store]: Elim1 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 11 [2023-02-14 01:35:29,961 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 01:35:29,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:35:30,423 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 01:35:30,423 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2023-02-14 01:35:30,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931240539] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:30,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:35:30,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 43 [2023-02-14 01:35:30,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676037080] [2023-02-14 01:35:30,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:35:30,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 01:35:30,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:35:30,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 01:35:30,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 01:35:30,586 INFO L87 Difference]: Start difference. First operand 197 states and 344 transitions. Second operand has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-14 01:35:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:32,031 INFO L93 Difference]: Finished difference Result 242 states and 408 transitions. [2023-02-14 01:35:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-14 01:35:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2023-02-14 01:35:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:32,035 INFO L225 Difference]: With dead ends: 242 [2023-02-14 01:35:32,035 INFO L226 Difference]: Without dead ends: 240 [2023-02-14 01:35:32,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=361, Invalid=4469, Unknown=0, NotChecked=0, Total=4830 [2023-02-14 01:35:32,037 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:32,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 298 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1672 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-14 01:35:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-02-14 01:35:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 184. [2023-02-14 01:35:32,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 130 states have (on average 1.2076923076923076) internal successors, (157), 133 states have internal predecessors, (157), 27 states have call successors, (27), 13 states have call predecessors, (27), 26 states have return successors, (132), 37 states have call predecessors, (132), 20 states have call successors, (132) [2023-02-14 01:35:32,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 316 transitions. [2023-02-14 01:35:32,061 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 316 transitions. Word has length 72 [2023-02-14 01:35:32,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:32,061 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 316 transitions. [2023-02-14 01:35:32,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2023-02-14 01:35:32,062 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 316 transitions. [2023-02-14 01:35:32,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 01:35:32,064 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:32,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:32,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:32,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 01:35:32,270 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 4 times [2023-02-14 01:35:32,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:32,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097137049] [2023-02-14 01:35:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:32,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:32,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:32,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:32,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:32,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:32,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 01:35:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:32,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:35:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:33,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:33,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:33,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:33,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:33,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 01:35:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-02-14 01:35:33,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:33,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097137049] [2023-02-14 01:35:33,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097137049] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539762796] [2023-02-14 01:35:33,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 01:35:33,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:33,161 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) [2023-02-14 01:35:33,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 01:35:33,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 01:35:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:35:33,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-14 01:35:33,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:33,541 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 15 [2023-02-14 01:35:33,543 INFO L350 Elim1Store]: Elim1 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 11 [2023-02-14 01:35:33,555 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-14 01:35:33,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:35:33,952 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 01:35:33,952 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 25 [2023-02-14 01:35:34,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539762796] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:34,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:35:34,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 30 [2023-02-14 01:35:34,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979755771] [2023-02-14 01:35:34,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:35:34,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 01:35:34,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:35:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 01:35:34,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 01:35:34,100 INFO L87 Difference]: Start difference. First operand 184 states and 316 transitions. Second operand has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2023-02-14 01:35:35,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:35,096 INFO L93 Difference]: Finished difference Result 230 states and 391 transitions. [2023-02-14 01:35:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 01:35:35,097 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 70 [2023-02-14 01:35:35,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:35,099 INFO L225 Difference]: With dead ends: 230 [2023-02-14 01:35:35,099 INFO L226 Difference]: Without dead ends: 228 [2023-02-14 01:35:35,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 99 SyntacticMatches, 8 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 01:35:35,100 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:35,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 228 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-14 01:35:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-14 01:35:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 199. [2023-02-14 01:35:35,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 142 states have (on average 1.1971830985915493) internal successors, (170), 144 states have internal predecessors, (170), 30 states have call successors, (30), 15 states have call predecessors, (30), 26 states have return successors, (132), 39 states have call predecessors, (132), 20 states have call successors, (132) [2023-02-14 01:35:35,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 332 transitions. [2023-02-14 01:35:35,124 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 332 transitions. Word has length 70 [2023-02-14 01:35:35,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:35,125 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 332 transitions. [2023-02-14 01:35:35,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.04) internal successors, (51), 23 states have internal predecessors, (51), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2023-02-14 01:35:35,125 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 332 transitions. [2023-02-14 01:35:35,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 01:35:35,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:35,127 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:35,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:35,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 01:35:35,334 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:35,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:35,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2023-02-14 01:35:35,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:35,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871162803] [2023-02-14 01:35:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:35,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:35,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:35,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:35,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:35,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:35,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 01:35:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:35,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:35:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:36,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:36,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:36,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:36,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 01:35:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 01:35:36,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:36,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871162803] [2023-02-14 01:35:36,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871162803] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:36,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508278633] [2023-02-14 01:35:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:36,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:36,340 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) [2023-02-14 01:35:36,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 01:35:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:36,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-14 01:35:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:36,503 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:35:36,505 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:35:37,071 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 17 [2023-02-14 01:35:37,074 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2023-02-14 01:35:37,190 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-02-14 01:35:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 27 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 01:35:37,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:35:37,654 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 01:35:37,654 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 30 [2023-02-14 01:35:37,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508278633] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:37,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:35:37,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23] total 43 [2023-02-14 01:35:37,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202093155] [2023-02-14 01:35:37,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:35:37,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-14 01:35:37,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:35:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-14 01:35:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2023-02-14 01:35:37,813 INFO L87 Difference]: Start difference. First operand 199 states and 332 transitions. Second operand has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 01:35:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:44,416 INFO L93 Difference]: Finished difference Result 603 states and 1298 transitions. [2023-02-14 01:35:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-02-14 01:35:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2023-02-14 01:35:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:44,423 INFO L225 Difference]: With dead ends: 603 [2023-02-14 01:35:44,423 INFO L226 Difference]: Without dead ends: 601 [2023-02-14 01:35:44,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4523 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1394, Invalid=17238, Unknown=0, NotChecked=0, Total=18632 [2023-02-14 01:35:44,425 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 308 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 3722 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 4023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 3722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:44,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 381 Invalid, 4023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 3722 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-14 01:35:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2023-02-14 01:35:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 338. [2023-02-14 01:35:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 241 states have (on average 1.2116182572614107) internal successors, (292), 249 states have internal predecessors, (292), 44 states have call successors, (44), 19 states have call predecessors, (44), 52 states have return successors, (393), 69 states have call predecessors, (393), 33 states have call successors, (393) [2023-02-14 01:35:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 729 transitions. [2023-02-14 01:35:44,485 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 729 transitions. Word has length 71 [2023-02-14 01:35:44,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:44,485 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 729 transitions. [2023-02-14 01:35:44,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 32 states have internal predecessors, (66), 15 states have call successors, (23), 7 states have call predecessors, (23), 8 states have return successors, (15), 12 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 01:35:44,485 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 729 transitions. [2023-02-14 01:35:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 01:35:44,489 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:44,489 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:44,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:44,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-14 01:35:44,695 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:44,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:44,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2023-02-14 01:35:44,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:44,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794608528] [2023-02-14 01:35:44,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:44,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:35:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 01:35:45,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794608528] [2023-02-14 01:35:45,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794608528] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434291175] [2023-02-14 01:35:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:45,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:45,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:45,952 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) [2023-02-14 01:35:45,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 01:35:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-14 01:35:46,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:46,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-14 01:35:46,248 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:46,251 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:46,345 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 18 [2023-02-14 01:35:46,355 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 18 [2023-02-14 01:35:46,421 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-14 01:35:46,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-14 01:35:46,472 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 18 [2023-02-14 01:35:46,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-14 01:35:47,341 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:35:47,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:35:47,344 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:35:47,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2023-02-14 01:35:47,350 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-14 01:35:47,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2023-02-14 01:35:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-14 01:35:47,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:35:50,181 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 4 |c_nondet_tree_#res.offset|))) (and (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (store |c_#memory_$Pointer$.base| 0 (store (select |c_#memory_$Pointer$.base| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| 0 (store (select |c_#memory_$Pointer$.offset| 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (or (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 4) 0) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (or (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_11) 0))) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (or (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse0) 0)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_11) 0))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse0) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 4) 0))))) is different from false [2023-02-14 01:35:52,242 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base)) (.cse1 (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base)) (.cse2 (+ 8 c_nondet_tree_~n~0.offset)) (.cse3 (+ 4 c_nondet_tree_~n~0.offset))) (and (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int) (v_ArrVal_1594 Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1594)))) (store .cse0 0 (store (select .cse0 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)) (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int) (v_ArrVal_1595 Int)) (or (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1595)))) (store .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select .cse4 v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_11) 0))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int) (v_ArrVal_1594 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (= (select (select (let ((.cse6 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1594)))) (store .cse6 v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select .cse6 v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 4) 0))) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int) (v_ArrVal_1595 Int)) (= (select (select (let ((.cse7 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1595)))) (store .cse7 0 (store (select .cse7 0) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)) (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int) (v_ArrVal_1595 Int)) (or (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store .cse5 .cse2 v_ArrVal_1595)))) (store .cse8 v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select .cse8 v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 4) 0))) (forall ((v_ArrVal_1594 Int) (v_nondet_tree_~n~0.base_BEFORE_CALL_11 Int)) (or (forall ((v_nondet_tree_~n~0.offset_BEFORE_CALL_28 Int)) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store .cse1 .cse2 v_ArrVal_1594)))) (store .cse9 v_nondet_tree_~n~0.base_BEFORE_CALL_11 (store (select .cse9 v_nondet_tree_~n~0.base_BEFORE_CALL_11) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_28 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) .cse3) 0)) (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_11) 0))))) is different from false [2023-02-14 01:35:52,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434291175] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:52,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:35:52,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2023-02-14 01:35:52,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945874135] [2023-02-14 01:35:52,292 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:35:52,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-14 01:35:52,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:35:52,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-14 01:35:52,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2910, Unknown=2, NotChecked=218, Total=3306 [2023-02-14 01:35:52,294 INFO L87 Difference]: Start difference. First operand 338 states and 729 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2023-02-14 01:35:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:35:56,768 INFO L93 Difference]: Finished difference Result 857 states and 2160 transitions. [2023-02-14 01:35:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-14 01:35:56,773 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) Word has length 76 [2023-02-14 01:35:56,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:35:56,783 INFO L225 Difference]: With dead ends: 857 [2023-02-14 01:35:56,784 INFO L226 Difference]: Without dead ends: 815 [2023-02-14 01:35:56,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=889, Invalid=11999, Unknown=2, NotChecked=450, Total=13340 [2023-02-14 01:35:56,790 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 230 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 3262 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 3446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-14 01:35:56,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 329 Invalid, 3446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3262 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-14 01:35:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2023-02-14 01:35:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 643. [2023-02-14 01:35:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 467 states have (on average 1.222698072805139) internal successors, (571), 483 states have internal predecessors, (571), 69 states have call successors, (69), 30 states have call predecessors, (69), 106 states have return successors, (1009), 129 states have call predecessors, (1009), 51 states have call successors, (1009) [2023-02-14 01:35:56,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1649 transitions. [2023-02-14 01:35:56,910 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1649 transitions. Word has length 76 [2023-02-14 01:35:56,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:35:56,911 INFO L495 AbstractCegarLoop]: Abstraction has 643 states and 1649 transitions. [2023-02-14 01:35:56,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2023-02-14 01:35:56,911 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1649 transitions. [2023-02-14 01:35:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 01:35:56,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:35:56,917 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:35:56,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-14 01:35:57,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 01:35:57,124 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:35:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:35:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1595709832, now seen corresponding path program 3 times [2023-02-14 01:35:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:35:57,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492708671] [2023-02-14 01:35:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:35:57,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:35:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:58,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:35:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:35:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:35:58,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:35:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:35:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:35:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-14 01:35:58,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:35:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492708671] [2023-02-14 01:35:58,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492708671] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:35:58,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641178787] [2023-02-14 01:35:58,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 01:35:58,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:35:58,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:35:58,497 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) [2023-02-14 01:35:58,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 01:35:58,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 01:35:58,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:35:58,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-14 01:35:58,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:35:58,741 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:58,743 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:35:58,810 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-02-14 01:35:58,811 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 22 [2023-02-14 01:35:58,820 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2023-02-14 01:35:58,820 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 22 [2023-02-14 01:36:00,046 INFO L321 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2023-02-14 01:36:00,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 103 [2023-02-14 01:36:00,090 INFO L321 Elim1Store]: treesize reduction 28, result has 54.1 percent of original size [2023-02-14 01:36:00,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 80 [2023-02-14 01:36:00,564 INFO L321 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2023-02-14 01:36:00,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 33 [2023-02-14 01:36:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-14 01:36:00,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:36:01,218 INFO L321 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2023-02-14 01:36:01,218 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 49 [2023-02-14 01:36:01,519 INFO L321 Elim1Store]: treesize reduction 4, result has 91.5 percent of original size [2023-02-14 01:36:01,519 INFO L350 Elim1Store]: Elim1 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 49 treesize of output 49 [2023-02-14 01:36:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-02-14 01:36:03,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641178787] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 01:36:03,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 01:36:03,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 23] total 64 [2023-02-14 01:36:03,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089498416] [2023-02-14 01:36:03,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 01:36:03,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-14 01:36:03,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:36:03,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-14 01:36:03,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3830, Unknown=0, NotChecked=0, Total=4032 [2023-02-14 01:36:03,637 INFO L87 Difference]: Start difference. First operand 643 states and 1649 transitions. Second operand has 64 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 43 states have internal predecessors, (102), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-14 01:36:11,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:36:11,097 INFO L93 Difference]: Finished difference Result 1095 states and 2604 transitions. [2023-02-14 01:36:11,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-14 01:36:11,097 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 43 states have internal predecessors, (102), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) Word has length 76 [2023-02-14 01:36:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:36:11,114 INFO L225 Difference]: With dead ends: 1095 [2023-02-14 01:36:11,114 INFO L226 Difference]: Without dead ends: 1064 [2023-02-14 01:36:11,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=920, Invalid=13600, Unknown=0, NotChecked=0, Total=14520 [2023-02-14 01:36:11,117 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 234 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 4269 mSolverCounterSat, 82 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 4356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 4269 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-14 01:36:11,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 668 Invalid, 4356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 4269 Invalid, 5 Unknown, 0 Unchecked, 2.7s Time] [2023-02-14 01:36:11,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2023-02-14 01:36:11,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 963. [2023-02-14 01:36:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 710 states have (on average 1.2154929577464788) internal successors, (863), 727 states have internal predecessors, (863), 104 states have call successors, (104), 54 states have call predecessors, (104), 148 states have return successors, (1311), 181 states have call predecessors, (1311), 62 states have call successors, (1311) [2023-02-14 01:36:11,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2278 transitions. [2023-02-14 01:36:11,313 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2278 transitions. Word has length 76 [2023-02-14 01:36:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:36:11,313 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 2278 transitions. [2023-02-14 01:36:11,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 43 states have internal predecessors, (102), 18 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (24), 19 states have call predecessors, (24), 10 states have call successors, (24) [2023-02-14 01:36:11,313 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2278 transitions. [2023-02-14 01:36:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-14 01:36:11,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:36:11,321 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:36:11,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 01:36:11,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:36:11,527 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:36:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:36:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 1 times [2023-02-14 01:36:11,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:36:11,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908283085] [2023-02-14 01:36:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:36:11,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:36:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:36:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:36:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:36:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 01:36:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:36:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:36:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 01:36:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 01:36:12,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:36:12,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908283085] [2023-02-14 01:36:12,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908283085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:36:12,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008887961] [2023-02-14 01:36:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:36:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:36:12,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:36:12,581 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:36:12,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 01:36:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:12,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-14 01:36:12,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:36:13,590 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 17 [2023-02-14 01:36:13,593 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 13 [2023-02-14 01:36:13,734 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-02-14 01:36:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 01:36:13,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:36:14,846 INFO L321 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-02-14 01:36:14,847 INFO L350 Elim1Store]: Elim1 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 47 treesize of output 30 [2023-02-14 01:36:15,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008887961] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:36:15,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:36:15,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 51 [2023-02-14 01:36:15,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736462327] [2023-02-14 01:36:15,459 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:36:15,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-14 01:36:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:36:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-14 01:36:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4618, Unknown=0, NotChecked=0, Total=4830 [2023-02-14 01:36:15,461 INFO L87 Difference]: Start difference. First operand 963 states and 2278 transitions. Second operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 01:36:20,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:36:20,255 INFO L93 Difference]: Finished difference Result 1402 states and 4443 transitions. [2023-02-14 01:36:20,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-14 01:36:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2023-02-14 01:36:20,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:36:20,278 INFO L225 Difference]: With dead ends: 1402 [2023-02-14 01:36:20,278 INFO L226 Difference]: Without dead ends: 1400 [2023-02-14 01:36:20,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3440 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1095, Invalid=14405, Unknown=0, NotChecked=0, Total=15500 [2023-02-14 01:36:20,281 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 181 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 4070 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 4194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 4070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-14 01:36:20,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 441 Invalid, 4194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 4070 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-14 01:36:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2023-02-14 01:36:20,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 948. [2023-02-14 01:36:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 701 states have (on average 1.216833095577746) internal successors, (853), 717 states have internal predecessors, (853), 100 states have call successors, (100), 54 states have call predecessors, (100), 146 states have return successors, (1262), 176 states have call predecessors, (1262), 58 states have call successors, (1262) [2023-02-14 01:36:20,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2215 transitions. [2023-02-14 01:36:20,515 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2215 transitions. Word has length 72 [2023-02-14 01:36:20,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:36:20,516 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 2215 transitions. [2023-02-14 01:36:20,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2023-02-14 01:36:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2215 transitions. [2023-02-14 01:36:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-14 01:36:20,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:36:20,529 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:36:20,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-14 01:36:20,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 01:36:20,744 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:36:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:36:20,744 INFO L85 PathProgramCache]: Analyzing trace with hash -700730293, now seen corresponding path program 4 times [2023-02-14 01:36:20,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:36:20,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745081787] [2023-02-14 01:36:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:36:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:36:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:21,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:21,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:36:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:21,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:36:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:21,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:36:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:21,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:36:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:21,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:36:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:21,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:36:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:21,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 01:36:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:22,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:22,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:36:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:22,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:22,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:36:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-14 01:36:22,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:36:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745081787] [2023-02-14 01:36:22,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745081787] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:36:22,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022799015] [2023-02-14 01:36:22,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 01:36:22,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:36:22,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:36:22,145 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:36:22,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 01:36:22,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 01:36:22,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:36:22,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 99 conjunts are in the unsatisfiable core [2023-02-14 01:36:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:36:22,472 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:36:22,475 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:36:22,998 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:36:23,010 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-02-14 01:36:23,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2023-02-14 01:36:23,021 INFO L321 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2023-02-14 01:36:23,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-02-14 01:36:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-02-14 01:36:23,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:36:35,579 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:36:45,714 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:36:45,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022799015] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:36:45,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:36:45,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 33 [2023-02-14 01:36:45,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863931830] [2023-02-14 01:36:45,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:36:45,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-14 01:36:45,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:36:45,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-14 01:36:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1674, Unknown=1, NotChecked=0, Total=1806 [2023-02-14 01:36:45,716 INFO L87 Difference]: Start difference. First operand 948 states and 2215 transitions. Second operand has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-14 01:36:47,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:36:47,339 INFO L93 Difference]: Finished difference Result 1681 states and 4043 transitions. [2023-02-14 01:36:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 01:36:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 86 [2023-02-14 01:36:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:36:47,354 INFO L225 Difference]: With dead ends: 1681 [2023-02-14 01:36:47,354 INFO L226 Difference]: Without dead ends: 1639 [2023-02-14 01:36:47,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=349, Invalid=3940, Unknown=1, NotChecked=0, Total=4290 [2023-02-14 01:36:47,356 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 145 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-14 01:36:47,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 270 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-14 01:36:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2023-02-14 01:36:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1224. [2023-02-14 01:36:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 907 states have (on average 1.2326350606394707) internal successors, (1118), 944 states have internal predecessors, (1118), 101 states have call successors, (101), 55 states have call predecessors, (101), 215 states have return successors, (1863), 224 states have call predecessors, (1863), 59 states have call successors, (1863) [2023-02-14 01:36:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 3082 transitions. [2023-02-14 01:36:47,596 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 3082 transitions. Word has length 86 [2023-02-14 01:36:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:36:47,596 INFO L495 AbstractCegarLoop]: Abstraction has 1224 states and 3082 transitions. [2023-02-14 01:36:47,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 11 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2023-02-14 01:36:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 3082 transitions. [2023-02-14 01:36:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 01:36:47,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:36:47,608 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:36:47,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-14 01:36:47,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 01:36:47,816 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:36:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:36:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 5 times [2023-02-14 01:36:47,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:36:47,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256009699] [2023-02-14 01:36:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:36:47,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:36:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:48,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:36:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:36:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:36:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 01:36:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:36:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:36:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:36:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 01:36:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:36:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 01:36:49,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:36:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256009699] [2023-02-14 01:36:49,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256009699] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:36:49,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486870775] [2023-02-14 01:36:49,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 01:36:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:36:49,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:36:49,737 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:36:49,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 01:36:49,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-14 01:36:49,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:36:49,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-14 01:36:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:36:50,039 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:36:50,108 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 18 [2023-02-14 01:36:50,112 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:36:51,058 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:36:51,067 INFO L321 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2023-02-14 01:36:51,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2023-02-14 01:36:51,078 INFO L321 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2023-02-14 01:36:51,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-02-14 01:36:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 01:36:51,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:37:07,716 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:37:07,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486870775] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:37:07,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:37:07,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 27] total 54 [2023-02-14 01:37:07,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458601999] [2023-02-14 01:37:07,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:37:07,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-14 01:37:07,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:37:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-14 01:37:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3681, Unknown=2, NotChecked=0, Total=3906 [2023-02-14 01:37:07,750 INFO L87 Difference]: Start difference. First operand 1224 states and 3082 transitions. Second operand has 54 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 20 states have call successors, (22), 10 states have call predecessors, (22), 17 states have return successors, (20), 16 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-14 01:37:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:37:16,724 INFO L93 Difference]: Finished difference Result 2190 states and 7546 transitions. [2023-02-14 01:37:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-14 01:37:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 20 states have call successors, (22), 10 states have call predecessors, (22), 17 states have return successors, (20), 16 states have call predecessors, (20), 16 states have call successors, (20) Word has length 76 [2023-02-14 01:37:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:37:16,759 INFO L225 Difference]: With dead ends: 2190 [2023-02-14 01:37:16,759 INFO L226 Difference]: Without dead ends: 2178 [2023-02-14 01:37:16,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4079 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=1394, Invalid=15374, Unknown=2, NotChecked=0, Total=16770 [2023-02-14 01:37:16,763 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 414 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 4905 mSolverCounterSat, 489 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 5396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 4905 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-02-14 01:37:16,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 466 Invalid, 5396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 4905 Invalid, 2 Unknown, 0 Unchecked, 2.9s Time] [2023-02-14 01:37:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2178 states. [2023-02-14 01:37:17,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2178 to 1386. [2023-02-14 01:37:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1028 states have (on average 1.2344357976653697) internal successors, (1269), 1066 states have internal predecessors, (1269), 116 states have call successors, (116), 61 states have call predecessors, (116), 241 states have return successors, (2252), 258 states have call predecessors, (2252), 72 states have call successors, (2252) [2023-02-14 01:37:17,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 3637 transitions. [2023-02-14 01:37:17,138 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 3637 transitions. Word has length 76 [2023-02-14 01:37:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:37:17,139 INFO L495 AbstractCegarLoop]: Abstraction has 1386 states and 3637 transitions. [2023-02-14 01:37:17,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 41 states have internal predecessors, (87), 20 states have call successors, (22), 10 states have call predecessors, (22), 17 states have return successors, (20), 16 states have call predecessors, (20), 16 states have call successors, (20) [2023-02-14 01:37:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 3637 transitions. [2023-02-14 01:37:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 01:37:17,152 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:37:17,153 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:37:17,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-14 01:37:17,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:37:17,360 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:37:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:37:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2023-02-14 01:37:17,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:37:17,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781570785] [2023-02-14 01:37:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:37:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:37:17,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:37:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:37:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:37:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:37:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 01:37:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 01:37:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:37:18,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:37:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:37:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 01:37:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-02-14 01:37:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:37:18,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781570785] [2023-02-14 01:37:18,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781570785] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:37:18,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995383477] [2023-02-14 01:37:18,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 01:37:18,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:37:18,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:37:18,633 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:37:18,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 01:37:18,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 01:37:18,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:37:18,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 102 conjunts are in the unsatisfiable core [2023-02-14 01:37:18,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:37:18,911 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:37:18,956 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 18 [2023-02-14 01:37:18,960 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:37:19,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 01:37:19,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 01:37:19,734 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:37:19,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 33 [2023-02-14 01:37:19,744 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-02-14 01:37:19,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2023-02-14 01:37:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 39 proven. 33 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 01:37:19,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:37:30,269 WARN L233 SmtUtils]: Spent 10.01s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:37:40,382 WARN L233 SmtUtils]: Spent 10.02s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 01:37:40,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995383477] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:37:40,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:37:40,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27] total 41 [2023-02-14 01:37:40,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839818578] [2023-02-14 01:37:40,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:37:40,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-14 01:37:40,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:37:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-14 01:37:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2381, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 01:37:40,384 INFO L87 Difference]: Start difference. First operand 1386 states and 3637 transitions. Second operand has 41 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) [2023-02-14 01:37:48,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-14 01:37:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:37:49,317 INFO L93 Difference]: Finished difference Result 3642 states and 14084 transitions. [2023-02-14 01:37:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-14 01:37:49,317 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) Word has length 76 [2023-02-14 01:37:49,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:37:49,416 INFO L225 Difference]: With dead ends: 3642 [2023-02-14 01:37:49,417 INFO L226 Difference]: Without dead ends: 3422 [2023-02-14 01:37:49,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=929, Invalid=11061, Unknown=0, NotChecked=0, Total=11990 [2023-02-14 01:37:49,423 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 222 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 182 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-02-14 01:37:49,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 348 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2543 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-02-14 01:37:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3422 states. [2023-02-14 01:37:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3422 to 1624. [2023-02-14 01:37:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1203 states have (on average 1.2352452202826267) internal successors, (1486), 1237 states have internal predecessors, (1486), 143 states have call successors, (143), 71 states have call predecessors, (143), 277 states have return successors, (2548), 315 states have call predecessors, (2548), 97 states have call successors, (2548) [2023-02-14 01:37:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 4177 transitions. [2023-02-14 01:37:50,027 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 4177 transitions. Word has length 76 [2023-02-14 01:37:50,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:37:50,027 INFO L495 AbstractCegarLoop]: Abstraction has 1624 states and 4177 transitions. [2023-02-14 01:37:50,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 15 states have call successors, (21), 9 states have call predecessors, (21), 13 states have return successors, (18), 14 states have call predecessors, (18), 12 states have call successors, (18) [2023-02-14 01:37:50,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 4177 transitions. [2023-02-14 01:37:50,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-14 01:37:50,043 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:37:50,044 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:37:50,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 01:37:50,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:37:50,251 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:37:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:37:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -560347655, now seen corresponding path program 5 times [2023-02-14 01:37:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:37:50,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577167194] [2023-02-14 01:37:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:37:50,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:37:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:37:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:37:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:37:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:37:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:37:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 01:37:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2023-02-14 01:37:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-14 01:37:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:37:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:37:51,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:37:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:37:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 01:37:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-14 01:37:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 01:37:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 50 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-02-14 01:37:51,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 01:37:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577167194] [2023-02-14 01:37:51,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577167194] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:37:51,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158771028] [2023-02-14 01:37:51,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 01:37:51,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:37:51,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 01:37:51,941 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 01:37:51,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 01:37:52,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-14 01:37:52,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 01:37:52,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 113 conjunts are in the unsatisfiable core [2023-02-14 01:37:52,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 01:37:52,315 INFO L350 Elim1Store]: Elim1 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 [2023-02-14 01:37:52,316 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 5 [2023-02-14 01:37:53,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:37:53,251 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 55 [2023-02-14 01:37:53,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:37:53,257 INFO L350 Elim1Store]: Elim1 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 42 [2023-02-14 01:37:53,395 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-02-14 01:37:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-14 01:37:53,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 01:37:54,279 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:37:54,279 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 70 [2023-02-14 01:37:54,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 01:37:54,759 INFO L350 Elim1Store]: Elim1 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 53 treesize of output 56 [2023-02-14 01:37:55,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158771028] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 01:37:55,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 01:37:55,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 57 [2023-02-14 01:37:55,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96844720] [2023-02-14 01:37:55,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 01:37:55,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-14 01:37:55,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 01:37:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-14 01:37:55,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=4768, Unknown=0, NotChecked=0, Total=4970 [2023-02-14 01:37:55,122 INFO L87 Difference]: Start difference. First operand 1624 states and 4177 transitions. Second operand has 57 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 41 states have internal predecessors, (84), 19 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) [2023-02-14 01:38:00,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 01:38:00,005 INFO L93 Difference]: Finished difference Result 2757 states and 8336 transitions. [2023-02-14 01:38:00,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-14 01:38:00,005 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 41 states have internal predecessors, (84), 19 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) Word has length 99 [2023-02-14 01:38:00,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 01:38:00,035 INFO L225 Difference]: With dead ends: 2757 [2023-02-14 01:38:00,035 INFO L226 Difference]: Without dead ends: 2755 [2023-02-14 01:38:00,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3188 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1108, Invalid=14642, Unknown=0, NotChecked=0, Total=15750 [2023-02-14 01:38:00,038 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 177 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 3583 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 3673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 3583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-14 01:38:00,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 445 Invalid, 3673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 3583 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-14 01:38:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2755 states. [2023-02-14 01:38:00,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2755 to 1756. [2023-02-14 01:38:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1296 states have (on average 1.2376543209876543) internal successors, (1604), 1350 states have internal predecessors, (1604), 143 states have call successors, (143), 71 states have call predecessors, (143), 316 states have return successors, (2932), 334 states have call predecessors, (2932), 97 states have call successors, (2932) [2023-02-14 01:38:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 4679 transitions. [2023-02-14 01:38:00,488 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 4679 transitions. Word has length 99 [2023-02-14 01:38:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 01:38:00,488 INFO L495 AbstractCegarLoop]: Abstraction has 1756 states and 4679 transitions. [2023-02-14 01:38:00,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 41 states have internal predecessors, (84), 19 states have call successors, (28), 8 states have call predecessors, (28), 11 states have return successors, (20), 17 states have call predecessors, (20), 13 states have call successors, (20) [2023-02-14 01:38:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 4679 transitions. [2023-02-14 01:38:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-14 01:38:00,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 01:38:00,505 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 01:38:00,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 01:38:00,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 01:38:00,713 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 01:38:00,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 01:38:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash -285986040, now seen corresponding path program 3 times [2023-02-14 01:38:00,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 01:38:00,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370875718] [2023-02-14 01:38:00,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 01:38:00,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 01:38:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat