./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/recursive/MultCommutative-2.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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 06:21:49,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 06:21:49,344 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 06:21:49,386 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 06:21:49,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 06:21:49,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 06:21:49,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 06:21:49,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 06:21:49,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 06:21:49,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 06:21:49,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 06:21:49,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 06:21:49,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 06:21:49,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 06:21:49,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 06:21:49,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 06:21:49,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 06:21:49,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 06:21:49,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 06:21:49,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 06:21:49,410 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 06:21:49,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 06:21:49,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 06:21:49,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 06:21:49,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 06:21:49,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 06:21:49,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 06:21:49,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 06:21:49,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 06:21:49,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 06:21:49,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 06:21:49,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 06:21:49,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 06:21:49,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 06:21:49,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 06:21:49,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 06:21:49,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 06:21:49,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 06:21:49,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 06:21:49,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 06:21:49,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 06:21:49,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 06:21:49,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 06:21:49,452 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 06:21:49,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 06:21:49,453 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 06:21:49,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 06:21:49,454 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 06:21:49,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 06:21:49,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 06:21:49,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 06:21:49,455 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 06:21:49,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 06:21:49,456 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 06:21:49,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 06:21:49,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 06:21:49,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 06:21:49,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 06:21:49,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 06:21:49,456 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 06:21:49,456 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 06:21:49,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 06:21:49,457 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 06:21:49,457 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 06:21:49,457 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 06:21:49,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 06:21:49,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 06:21:49,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:21:49,458 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 06:21:49,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 06:21:49,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 06:21:49,459 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 06:21:49,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 06:21:49,459 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 06:21:49,459 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 06:21:49,459 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 06:21:49,460 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2022-07-12 06:21:49,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 06:21:49,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 06:21:49,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 06:21:49,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 06:21:49,644 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 06:21:49,645 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2022-07-12 06:21:49,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9df0b5376/b8894e2ffaeb4686b1ab6fc3ce059cfa/FLAGce952a5b7 [2022-07-12 06:21:50,032 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 06:21:50,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2022-07-12 06:21:50,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9df0b5376/b8894e2ffaeb4686b1ab6fc3ce059cfa/FLAGce952a5b7 [2022-07-12 06:21:50,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9df0b5376/b8894e2ffaeb4686b1ab6fc3ce059cfa [2022-07-12 06:21:50,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 06:21:50,485 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 06:21:50,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 06:21:50,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 06:21:50,489 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 06:21:50,490 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ae9a7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50, skipping insertion in model container [2022-07-12 06:21:50,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 06:21:50,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 06:21:50,671 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2022-07-12 06:21:50,675 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:21:50,681 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 06:21:50,698 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2022-07-12 06:21:50,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 06:21:50,715 INFO L208 MainTranslator]: Completed translation [2022-07-12 06:21:50,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50 WrapperNode [2022-07-12 06:21:50,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 06:21:50,717 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 06:21:50,717 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 06:21:50,717 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 06:21:50,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,738 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-07-12 06:21:50,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 06:21:50,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 06:21:50,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 06:21:50,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 06:21:50,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,752 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 06:21:50,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 06:21:50,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 06:21:50,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 06:21:50,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (1/1) ... [2022-07-12 06:21:50,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 06:21:50,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:21:50,877 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) [2022-07-12 06:21:50,929 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 [2022-07-12 06:21:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 06:21:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-07-12 06:21:50,942 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-07-12 06:21:50,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 06:21:50,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 06:21:50,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 06:21:50,986 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 06:21:50,987 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 06:21:51,118 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 06:21:51,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 06:21:51,122 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 06:21:51,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:21:51 BoogieIcfgContainer [2022-07-12 06:21:51,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 06:21:51,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 06:21:51,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 06:21:51,138 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 06:21:51,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:21:50" (1/3) ... [2022-07-12 06:21:51,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef23611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:21:51, skipping insertion in model container [2022-07-12 06:21:51,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:21:50" (2/3) ... [2022-07-12 06:21:51,139 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef23611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:21:51, skipping insertion in model container [2022-07-12 06:21:51,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:21:51" (3/3) ... [2022-07-12 06:21:51,140 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2022-07-12 06:21:51,149 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 06:21:51,163 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 06:21:51,209 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 06:21:51,216 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2a12000b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1edca579 [2022-07-12 06:21:51,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 06:21:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-12 06:21:51,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 06:21:51,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:51,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:51,232 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:51,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2022-07-12 06:21:51,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:51,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553730138] [2022-07-12 06:21:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:51,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:21:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:51,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 06:21:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-12 06:21:51,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553730138] [2022-07-12 06:21:51,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553730138] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:21:51,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:21:51,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 06:21:51,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492590739] [2022-07-12 06:21:51,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:21:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 06:21:51,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:51,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 06:21:51,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-12 06:21:51,557 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:21:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:51,646 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2022-07-12 06:21:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:21:51,648 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-12 06:21:51,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:51,655 INFO L225 Difference]: With dead ends: 44 [2022-07-12 06:21:51,655 INFO L226 Difference]: Without dead ends: 28 [2022-07-12 06:21:51,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-12 06:21:51,660 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:21:51,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:21:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-12 06:21:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-12 06:21:51,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-12 06:21:51,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-07-12 06:21:51,687 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2022-07-12 06:21:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:51,688 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-07-12 06:21:51,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-12 06:21:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-07-12 06:21:51,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 06:21:51,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:51,690 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:51,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 06:21:51,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:51,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:51,691 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2022-07-12 06:21:51,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:51,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256836666] [2022-07-12 06:21:51,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:51,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:21:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:51,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-12 06:21:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:51,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:21:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 06:21:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256836666] [2022-07-12 06:21:51,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256836666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:21:51,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329660440] [2022-07-12 06:21:51,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:51,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:21:51,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:21:51,834 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) [2022-07-12 06:21:51,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 06:21:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:51,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 06:21:51,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:21:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:21:51,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:21:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 06:21:52,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329660440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:21:52,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:21:52,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-07-12 06:21:52,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314755666] [2022-07-12 06:21:52,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:21:52,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 06:21:52,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:52,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 06:21:52,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-12 06:21:52,037 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 06:21:52,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:52,171 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2022-07-12 06:21:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 06:21:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2022-07-12 06:21:52,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:52,173 INFO L225 Difference]: With dead ends: 52 [2022-07-12 06:21:52,173 INFO L226 Difference]: Without dead ends: 27 [2022-07-12 06:21:52,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-07-12 06:21:52,175 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:21:52,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 06:21:52,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-12 06:21:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-12 06:21:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-12 06:21:52,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-12 06:21:52,180 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 26 [2022-07-12 06:21:52,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:52,181 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-12 06:21:52,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-12 06:21:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-07-12 06:21:52,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 06:21:52,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:52,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:52,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 06:21:52,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:21:52,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 1 times [2022-07-12 06:21:52,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:52,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458103079] [2022-07-12 06:21:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:52,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:21:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 06:21:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-12 06:21:52,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:52,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458103079] [2022-07-12 06:21:52,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458103079] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 06:21:52,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 06:21:52,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 06:21:52,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901936523] [2022-07-12 06:21:52,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 06:21:52,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 06:21:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:52,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 06:21:52,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 06:21:52,459 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 06:21:52,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:52,486 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-07-12 06:21:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 06:21:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-12 06:21:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:52,488 INFO L225 Difference]: With dead ends: 31 [2022-07-12 06:21:52,488 INFO L226 Difference]: Without dead ends: 27 [2022-07-12 06:21:52,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 06:21:52,489 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:21:52,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:21:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-12 06:21:52,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-12 06:21:52,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-12 06:21:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-12 06:21:52,493 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 27 [2022-07-12 06:21:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:52,494 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-12 06:21:52,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 06:21:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-12 06:21:52,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-12 06:21:52,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:52,498 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:52,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 06:21:52,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:52,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 2 times [2022-07-12 06:21:52,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:52,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061881530] [2022-07-12 06:21:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:52,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:21:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 06:21:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:52,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 06:21:52,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:52,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061881530] [2022-07-12 06:21:52,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061881530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:21:52,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339024232] [2022-07-12 06:21:52,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:21:52,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:21:52,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:21:52,776 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) [2022-07-12 06:21:52,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 06:21:52,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:21:52,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:21:52,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-12 06:21:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:21:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-12 06:21:53,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:21:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 06:21:53,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339024232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:21:53,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:21:53,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 35 [2022-07-12 06:21:53,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846617914] [2022-07-12 06:21:53,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:21:53,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-12 06:21:53,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:53,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-12 06:21:53,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-07-12 06:21:53,808 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-12 06:21:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:54,166 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-07-12 06:21:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 06:21:54,166 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2022-07-12 06:21:54,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:54,168 INFO L225 Difference]: With dead ends: 40 [2022-07-12 06:21:54,168 INFO L226 Difference]: Without dead ends: 36 [2022-07-12 06:21:54,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-07-12 06:21:54,169 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 06:21:54,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 188 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 06:21:54,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-12 06:21:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-12 06:21:54,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-12 06:21:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-07-12 06:21:54,176 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 34 [2022-07-12 06:21:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:54,176 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-07-12 06:21:54,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-12 06:21:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-07-12 06:21:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-12 06:21:54,178 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:54,178 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:54,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 06:21:54,394 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 [2022-07-12 06:21:54,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:54,395 INFO L85 PathProgramCache]: Analyzing trace with hash -757286924, now seen corresponding path program 1 times [2022-07-12 06:21:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:54,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748057379] [2022-07-12 06:21:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:54,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:54,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:21:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:54,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:54,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 06:21:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:54,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:54,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 06:21:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:54,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:54,471 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 06:21:54,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:54,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748057379] [2022-07-12 06:21:54,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748057379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:21:54,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829303235] [2022-07-12 06:21:54,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:54,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:21:54,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:21:54,496 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) [2022-07-12 06:21:54,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 06:21:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:54,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 06:21:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:21:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-12 06:21:54,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:21:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-12 06:21:54,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829303235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:21:54,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:21:54,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-07-12 06:21:54,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293028970] [2022-07-12 06:21:54,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:21:54,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 06:21:54,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 06:21:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-07-12 06:21:54,687 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-12 06:21:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:54,758 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-07-12 06:21:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 06:21:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 47 [2022-07-12 06:21:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:54,760 INFO L225 Difference]: With dead ends: 54 [2022-07-12 06:21:54,760 INFO L226 Difference]: Without dead ends: 25 [2022-07-12 06:21:54,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-12 06:21:54,761 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:21:54,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 78 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 06:21:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-12 06:21:54,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-12 06:21:54,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-12 06:21:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-12 06:21:54,766 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 47 [2022-07-12 06:21:54,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:54,766 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-12 06:21:54,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-12 06:21:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-12 06:21:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-12 06:21:54,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:54,767 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:54,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 06:21:54,984 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 [2022-07-12 06:21:54,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 3 times [2022-07-12 06:21:54,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:54,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908571082] [2022-07-12 06:21:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:54,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:55,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:21:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:55,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:55,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 06:21:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:55,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:55,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-12 06:21:55,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:55,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908571082] [2022-07-12 06:21:55,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908571082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:21:55,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488316016] [2022-07-12 06:21:55,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:21:55,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:21:55,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:21:55,340 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) [2022-07-12 06:21:55,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 06:21:55,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-12 06:21:55,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:21:55,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-12 06:21:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:21:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-12 06:21:55,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:21:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 06:21:57,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488316016] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:21:57,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:21:57,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 49 [2022-07-12 06:21:57,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5943833] [2022-07-12 06:21:57,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:21:57,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 06:21:57,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:21:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 06:21:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 06:21:57,089 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-12 06:21:58,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:21:58,121 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-07-12 06:21:58,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 06:21:58,122 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) Word has length 41 [2022-07-12 06:21:58,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:21:58,122 INFO L225 Difference]: With dead ends: 58 [2022-07-12 06:21:58,123 INFO L226 Difference]: Without dead ends: 52 [2022-07-12 06:21:58,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=469, Invalid=3821, Unknown=0, NotChecked=0, Total=4290 [2022-07-12 06:21:58,124 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:21:58,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 403 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:21:58,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-12 06:21:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-07-12 06:21:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-12 06:21:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-07-12 06:21:58,131 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 41 [2022-07-12 06:21:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:21:58,131 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-07-12 06:21:58,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-12 06:21:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-07-12 06:21:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 06:21:58,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:21:58,133 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:21:58,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 06:21:58,350 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 [2022-07-12 06:21:58,350 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:21:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:21:58,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 4 times [2022-07-12 06:21:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:21:58,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854566342] [2022-07-12 06:21:58,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:21:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:21:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:21:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:58,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 06:21:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:21:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:21:58,787 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-12 06:21:58,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:21:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854566342] [2022-07-12 06:21:58,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854566342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:21:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664489690] [2022-07-12 06:21:58,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:21:58,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:21:58,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:21:58,789 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) [2022-07-12 06:21:58,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 06:21:58,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:21:58,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:21:58,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-12 06:21:58,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:21:59,416 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-12 06:21:59,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:03,260 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| Int) (v_mult_~n_BEFORE_CALL_20 Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_20_66| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111| Int)) (let ((.cse4 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| 3))) (let ((.cse3 (div (+ (* 2 v_mult_~n_BEFORE_CALL_20) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| (- 6))) (- 3))) (.cse2 (+ .cse4 |c_mult_#res|)) (.cse1 (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111| 3)) (.cse0 (div (+ (* (- 2) v_mult_~n_BEFORE_CALL_20) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| 6) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153|)) 3))) (or (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| 0) (<= .cse0 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111|) (<= (+ 3 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| .cse1) .cse2) (< .cse3 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153|) (< .cse4 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| (* |aux_div_v_mult_#in~n_BEFORE_CALL_20_66| 3))) (< .cse0 .cse3) (< .cse2 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| .cse1)) (< |aux_div_v_mult_#in~n_BEFORE_CALL_20_66| .cse0))))) (<= |c_mult_#in~m| 0) (forall ((v_mult_~n_BEFORE_CALL_20 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_20_66| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| Int)) (let ((.cse5 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|) (* (- 2) v_mult_~n_BEFORE_CALL_20) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| 6)) 3)) (.cse6 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| (- 6)) (* 2 v_mult_~n_BEFORE_CALL_20) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|)) (- 3))) (.cse8 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139| 3) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|)) (.cse7 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| 3))) (or (< |aux_div_v_mult_#in~n_BEFORE_CALL_20_66| .cse5) (<= |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139| .cse6) (<= (+ .cse7 3 |c_mult_#res|) .cse8) (< .cse6 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|) (< .cse7 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| (* |aux_div_v_mult_#in~n_BEFORE_CALL_20_66| 3))) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| 0) (< .cse5 .cse6) (< .cse8 (+ .cse7 |c_mult_#res|))))) (not (< |c_mult_#in~m| 0))) is different from false [2022-07-12 06:22:03,448 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 12 not checked. [2022-07-12 06:22:03,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664489690] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:03,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:03,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 51 [2022-07-12 06:22:03,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137767113] [2022-07-12 06:22:03,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:03,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 06:22:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:03,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 06:22:03,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2269, Unknown=1, NotChecked=96, Total=2550 [2022-07-12 06:22:03,451 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-12 06:22:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:04,549 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-07-12 06:22:04,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 06:22:04,550 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) Word has length 55 [2022-07-12 06:22:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:04,551 INFO L225 Difference]: With dead ends: 66 [2022-07-12 06:22:04,551 INFO L226 Difference]: Without dead ends: 58 [2022-07-12 06:22:04,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=437, Invalid=4258, Unknown=1, NotChecked=134, Total=4830 [2022-07-12 06:22:04,553 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:04,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 337 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1136 Invalid, 0 Unknown, 42 Unchecked, 0.5s Time] [2022-07-12 06:22:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-12 06:22:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-07-12 06:22:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (21), 11 states have call predecessors, (21), 7 states have call successors, (21) [2022-07-12 06:22:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-12 06:22:04,558 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 55 [2022-07-12 06:22:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:04,559 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-12 06:22:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-12 06:22:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-12 06:22:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-12 06:22:04,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:04,565 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:22:04,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:04,766 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 [2022-07-12 06:22:04,766 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:04,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1278690222, now seen corresponding path program 5 times [2022-07-12 06:22:04,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:04,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006778271] [2022-07-12 06:22:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:04,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:04,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:05,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 06:22:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:05,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-12 06:22:05,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006778271] [2022-07-12 06:22:05,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006778271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:05,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103229704] [2022-07-12 06:22:05,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:22:05,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:05,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:05,092 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) [2022-07-12 06:22:05,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 06:22:05,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-12 06:22:05,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:05,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-12 06:22:05,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 06:22:05,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 06:22:06,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103229704] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:06,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:06,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 23] total 53 [2022-07-12 06:22:06,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539071504] [2022-07-12 06:22:06,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-12 06:22:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-12 06:22:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2022-07-12 06:22:06,559 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 53 states, 49 states have (on average 1.469387755102041) internal successors, (72), 35 states have internal predecessors, (72), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (18), 18 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-12 06:22:07,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:07,293 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-12 06:22:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 06:22:07,294 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 1.469387755102041) internal successors, (72), 35 states have internal predecessors, (72), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (18), 18 states have call predecessors, (18), 10 states have call successors, (18) Word has length 48 [2022-07-12 06:22:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:07,299 INFO L225 Difference]: With dead ends: 72 [2022-07-12 06:22:07,300 INFO L226 Difference]: Without dead ends: 64 [2022-07-12 06:22:07,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=491, Invalid=4621, Unknown=0, NotChecked=0, Total=5112 [2022-07-12 06:22:07,302 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:07,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 259 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:22:07,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-12 06:22:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-12 06:22:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (20), 11 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-12 06:22:07,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-07-12 06:22:07,325 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 48 [2022-07-12 06:22:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:07,325 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-07-12 06:22:07,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 1.469387755102041) internal successors, (72), 35 states have internal predecessors, (72), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (18), 18 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-12 06:22:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-07-12 06:22:07,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 06:22:07,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:07,327 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:22:07,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:07,544 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 [2022-07-12 06:22:07,544 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:07,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:07,545 INFO L85 PathProgramCache]: Analyzing trace with hash 230391048, now seen corresponding path program 6 times [2022-07-12 06:22:07,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:07,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897004906] [2022-07-12 06:22:07,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:07,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 06:22:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:07,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:07,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:08,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-12 06:22:08,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897004906] [2022-07-12 06:22:08,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897004906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:08,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703984712] [2022-07-12 06:22:08,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:22:08,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:08,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:08,092 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) [2022-07-12 06:22:08,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 06:22:08,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-12 06:22:08,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:08,217 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-12 06:22:08,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-12 06:22:08,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 06:22:11,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703984712] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:11,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:11,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 30] total 62 [2022-07-12 06:22:11,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112069326] [2022-07-12 06:22:11,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:11,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-12 06:22:11,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:11,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-12 06:22:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3556, Unknown=0, NotChecked=0, Total=3782 [2022-07-12 06:22:11,093 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 62 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 38 states have internal predecessors, (83), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2022-07-12 06:22:12,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:12,498 INFO L93 Difference]: Finished difference Result 84 states and 113 transitions. [2022-07-12 06:22:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 06:22:12,498 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 38 states have internal predecessors, (83), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 69 [2022-07-12 06:22:12,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:12,499 INFO L225 Difference]: With dead ends: 84 [2022-07-12 06:22:12,499 INFO L226 Difference]: Without dead ends: 76 [2022-07-12 06:22:12,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=587, Invalid=6553, Unknown=0, NotChecked=0, Total=7140 [2022-07-12 06:22:12,502 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1653 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:12,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 499 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1653 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 06:22:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-12 06:22:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-07-12 06:22:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (33), 16 states have call predecessors, (33), 9 states have call successors, (33) [2022-07-12 06:22:12,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2022-07-12 06:22:12,519 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 69 [2022-07-12 06:22:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:12,520 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2022-07-12 06:22:12,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 38 states have internal predecessors, (83), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2022-07-12 06:22:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2022-07-12 06:22:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-12 06:22:12,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:12,522 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:22:12,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:12,739 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 [2022-07-12 06:22:12,740 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:12,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:12,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 7 times [2022-07-12 06:22:12,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:12,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883603998] [2022-07-12 06:22:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:12,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:12,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:12,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:12,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 06:22:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:12,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:13,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:13,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:13,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-12 06:22:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883603998] [2022-07-12 06:22:13,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883603998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957254191] [2022-07-12 06:22:13,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:22:13,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:13,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:13,429 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) [2022-07-12 06:22:13,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 06:22:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:13,492 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-12 06:22:13,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-12 06:22:14,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:18,704 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (<= |c_mult_#in~m| 0)) (.cse1 (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_58_112| Int) (|aux_mod_v_mult_#in~n_BEFORE_CALL_58_112| Int) (v_mult_~n_BEFORE_CALL_58 Int)) (let ((.cse12 (div (+ (* 2 |aux_mod_v_mult_#in~n_BEFORE_CALL_58_112|) (* 2 v_mult_~n_BEFORE_CALL_58) (* (- 12) |aux_div_v_mult_#in~n_BEFORE_CALL_58_112|) (* 2 |c_mult_#res|)) (- 6)))) (or (>= |aux_mod_v_mult_#in~n_BEFORE_CALL_58_112| 6) (> 0 |aux_mod_v_mult_#in~n_BEFORE_CALL_58_112|) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_58_112| .cse12) (< (div (+ (* (- 2) |c_mult_#res|) (* (- 2) |aux_mod_v_mult_#in~n_BEFORE_CALL_58_112|) (* 12 |aux_div_v_mult_#in~n_BEFORE_CALL_58_112|) (* (- 2) v_mult_~n_BEFORE_CALL_58)) 6) .cse12))))) (.cse6 (not (< |c_mult_#in~m| 0)))) (and .cse0 (or .cse1 .cse0) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_58_112| Int) (v_mult_~n_BEFORE_CALL_58 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| Int)) (let ((.cse2 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| (- 12)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 2) (* 2 v_mult_~n_BEFORE_CALL_58)) (- 6))) (.cse4 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 6)) (.cse3 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| (* 6 |aux_div_v_mult_#in~n_BEFORE_CALL_58_112|))) (.cse5 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 12) (* (- 2) v_mult_~n_BEFORE_CALL_58) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|)) 6))) (or (< .cse2 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_58_112| .cse2) (< .cse3 (+ .cse4 |c_mult_#res|)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 0) (< .cse4 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| 6) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|)) (< .cse5 .cse2) (<= (+ .cse4 6 |c_mult_#res|) .cse3) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| .cse5)))) .cse6 (or .cse1 .cse6) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_58_78| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| Int) (v_mult_~n_BEFORE_CALL_58 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| Int)) (let ((.cse7 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 6))) (let ((.cse9 (+ .cse7 |c_mult_#res|)) (.cse8 (* |aux_div_v_mult_#in~n_BEFORE_CALL_58_78| 6)) (.cse10 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) (* (- 2) v_mult_~n_BEFORE_CALL_58) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 12)) 6)) (.cse11 (div (+ (* 2 v_mult_~n_BEFORE_CALL_58) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| (- 12))) (- 6)))) (or (< .cse7 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| 6) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|)) (<= (+ .cse8 6 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) .cse9) (< .cse9 (+ .cse8 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 0) (< .cse10 .cse11) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| .cse10) (<= .cse10 |aux_div_v_mult_#in~n_BEFORE_CALL_58_78|) (< .cse11 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|))))))) is different from false [2022-07-12 06:22:20,769 WARN L833 $PredicateComparison]: unable to prove that (and (<= 0 |c_mult_#in~m|) (<= |c_mult_#in~m| 0) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_58_112| Int) (v_mult_~n_BEFORE_CALL_58 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| Int)) (let ((.cse0 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| (- 12)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 2) (* 2 v_mult_~n_BEFORE_CALL_58)) (- 6))) (.cse2 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 6)) (.cse1 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| (* 6 |aux_div_v_mult_#in~n_BEFORE_CALL_58_112|))) (.cse3 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 12) (* (- 2) v_mult_~n_BEFORE_CALL_58) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|)) 6))) (or (< .cse0 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_58_112| .cse0) (< .cse1 (+ .cse2 |c_mult_#res|)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 0) (< .cse2 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| 6) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|)) (< .cse3 .cse0) (<= (+ .cse2 6 |c_mult_#res|) .cse1) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| .cse3)))) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_58_78| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| Int) (v_mult_~n_BEFORE_CALL_58 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| Int)) (let ((.cse4 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 6))) (let ((.cse6 (+ .cse4 |c_mult_#res|)) (.cse5 (* |aux_div_v_mult_#in~n_BEFORE_CALL_58_78| 6)) (.cse7 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) (* (- 2) v_mult_~n_BEFORE_CALL_58) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 12)) 6)) (.cse8 (div (+ (* 2 v_mult_~n_BEFORE_CALL_58) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| (- 12))) (- 6)))) (or (< .cse4 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| 6) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|)) (<= (+ .cse5 6 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) .cse6) (< .cse6 (+ .cse5 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 0) (< .cse7 .cse8) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| .cse7) (<= .cse7 |aux_div_v_mult_#in~n_BEFORE_CALL_58_78|) (< .cse8 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|)))))) is different from false [2022-07-12 06:22:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 187 refuted. 0 times theorem prover too weak. 47 trivial. 18 not checked. [2022-07-12 06:22:20,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957254191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:20,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:20,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 35] total 70 [2022-07-12 06:22:20,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410273651] [2022-07-12 06:22:20,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:20,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-12 06:22:20,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:20,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-12 06:22:20,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=4310, Unknown=2, NotChecked=266, Total=4830 [2022-07-12 06:22:20,905 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand has 70 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 43 states have internal predecessors, (93), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-12 06:22:22,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:22,566 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2022-07-12 06:22:22,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-12 06:22:22,566 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 43 states have internal predecessors, (93), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) Word has length 76 [2022-07-12 06:22:22,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:22,568 INFO L225 Difference]: With dead ends: 88 [2022-07-12 06:22:22,568 INFO L226 Difference]: Without dead ends: 82 [2022-07-12 06:22:22,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 120 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=655, Invalid=7541, Unknown=2, NotChecked=358, Total=8556 [2022-07-12 06:22:22,570 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:22,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 662 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1875 Invalid, 0 Unknown, 119 Unchecked, 0.8s Time] [2022-07-12 06:22:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-12 06:22:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-12 06:22:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (36), 18 states have call predecessors, (36), 9 states have call successors, (36) [2022-07-12 06:22:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2022-07-12 06:22:22,578 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 76 [2022-07-12 06:22:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:22,578 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2022-07-12 06:22:22,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 43 states have internal predecessors, (93), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-12 06:22:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2022-07-12 06:22:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-12 06:22:22,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:22,579 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:22:22,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 06:22:22,796 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 [2022-07-12 06:22:22,797 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:22,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1821652060, now seen corresponding path program 8 times [2022-07-12 06:22:22,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:22,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077587735] [2022-07-12 06:22:22,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:22,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:22,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:22,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:22,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:22,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:22,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:23,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:23,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-12 06:22:23,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:23,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:23,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-12 06:22:23,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:23,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077587735] [2022-07-12 06:22:23,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077587735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:23,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629422378] [2022-07-12 06:22:23,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:22:23,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:23,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:23,225 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) [2022-07-12 06:22:23,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 06:22:23,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:22:23,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-12 06:22:23,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-07-12 06:22:23,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:22:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 06:22:25,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629422378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:22:25,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:22:25,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 21] total 51 [2022-07-12 06:22:25,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533215899] [2022-07-12 06:22:25,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:22:25,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-12 06:22:25,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:22:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-12 06:22:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2369, Unknown=0, NotChecked=0, Total=2550 [2022-07-12 06:22:25,090 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand has 51 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 06:22:26,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:22:26,124 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2022-07-12 06:22:26,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 06:22:26,125 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) Word has length 62 [2022-07-12 06:22:26,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:22:26,126 INFO L225 Difference]: With dead ends: 96 [2022-07-12 06:22:26,126 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 06:22:26,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 103 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=457, Invalid=4655, Unknown=0, NotChecked=0, Total=5112 [2022-07-12 06:22:26,130 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:22:26,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 331 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:22:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 06:22:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2022-07-12 06:22:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (35), 18 states have call predecessors, (35), 9 states have call successors, (35) [2022-07-12 06:22:26,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2022-07-12 06:22:26,150 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 62 [2022-07-12 06:22:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:22:26,150 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2022-07-12 06:22:26,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-12 06:22:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2022-07-12 06:22:26,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 06:22:26,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:22:26,153 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:22:26,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 06:22:26,369 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 [2022-07-12 06:22:26,370 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:22:26,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:22:26,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 9 times [2022-07-12 06:22:26,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:22:26,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917157103] [2022-07-12 06:22:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:22:26,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:22:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:22:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 06:22:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:26,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:27,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:27,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:22:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:22:27,195 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-12 06:22:27,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:22:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917157103] [2022-07-12 06:22:27,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917157103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:22:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056018127] [2022-07-12 06:22:27,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:22:27,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:22:27,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:22:27,216 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) [2022-07-12 06:22:27,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 06:22:27,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-12 06:22:27,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:22:27,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-12 06:22:27,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:22:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 20 proven. 174 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-12 06:22:28,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:17,093 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 68 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 06:23:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 33 proven. 259 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-12 06:23:17,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056018127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:23:17,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:23:17,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 40] total 80 [2022-07-12 06:23:17,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12903221] [2022-07-12 06:23:17,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:17,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-12 06:23:17,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:17,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-12 06:23:17,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=5994, Unknown=14, NotChecked=0, Total=6320 [2022-07-12 06:23:17,427 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 50 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (32), 30 states have call predecessors, (32), 15 states have call successors, (32) [2022-07-12 06:23:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:19,221 INFO L93 Difference]: Finished difference Result 100 states and 134 transitions. [2022-07-12 06:23:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-12 06:23:19,221 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 50 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (32), 30 states have call predecessors, (32), 15 states have call successors, (32) Word has length 83 [2022-07-12 06:23:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:19,222 INFO L225 Difference]: With dead ends: 100 [2022-07-12 06:23:19,222 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 06:23:19,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 49.4s TimeCoverageRelationStatistics Valid=853, Invalid=10053, Unknown=14, NotChecked=0, Total=10920 [2022-07-12 06:23:19,224 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 97 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 1850 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:19,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 607 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1850 Invalid, 0 Unknown, 23 Unchecked, 0.9s Time] [2022-07-12 06:23:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 06:23:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2022-07-12 06:23:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 9 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (38), 20 states have call predecessors, (38), 9 states have call successors, (38) [2022-07-12 06:23:19,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2022-07-12 06:23:19,237 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 83 [2022-07-12 06:23:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:19,237 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2022-07-12 06:23:19,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 50 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (32), 30 states have call predecessors, (32), 15 states have call successors, (32) [2022-07-12 06:23:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2022-07-12 06:23:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-12 06:23:19,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:19,240 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:23:19,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:19,457 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 [2022-07-12 06:23:19,457 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1356577930, now seen corresponding path program 10 times [2022-07-12 06:23:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410868338] [2022-07-12 06:23:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:19,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-12 06:23:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:19,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-12 06:23:19,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410868338] [2022-07-12 06:23:19,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410868338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:19,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785492932] [2022-07-12 06:23:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:23:19,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:19,964 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) [2022-07-12 06:23:19,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 06:23:20,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:23:20,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:20,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-12 06:23:20,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-12 06:23:20,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:33,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785492932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:33,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:33,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 40 [2022-07-12 06:23:33,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082574576] [2022-07-12 06:23:33,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:33,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 06:23:33,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:33,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 06:23:33,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3427, Unknown=7, NotChecked=0, Total=3660 [2022-07-12 06:23:33,078 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-12 06:23:33,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:33,803 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2022-07-12 06:23:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-12 06:23:33,803 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) Word has length 69 [2022-07-12 06:23:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:33,804 INFO L225 Difference]: With dead ends: 88 [2022-07-12 06:23:33,804 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 06:23:33,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 94 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=425, Invalid=4680, Unknown=7, NotChecked=0, Total=5112 [2022-07-12 06:23:33,805 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:33,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 408 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 06:23:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 06:23:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2022-07-12 06:23:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 7 states have call successors, (7), 3 states have call predecessors, (7), 16 states have return successors, (33), 19 states have call predecessors, (33), 7 states have call successors, (33) [2022-07-12 06:23:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2022-07-12 06:23:33,812 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 69 [2022-07-12 06:23:33,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:33,813 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2022-07-12 06:23:33,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-12 06:23:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2022-07-12 06:23:33,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 06:23:33,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:33,814 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:23:33,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-12 06:23:34,022 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 [2022-07-12 06:23:34,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:34,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:34,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1108033402, now seen corresponding path program 11 times [2022-07-12 06:23:34,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:34,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996920514] [2022-07-12 06:23:34,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:34,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 06:23:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-12 06:23:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:34,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996920514] [2022-07-12 06:23:34,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996920514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:34,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138281219] [2022-07-12 06:23:34,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:23:34,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:34,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:34,649 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) [2022-07-12 06:23:34,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 06:23:34,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-12 06:23:34,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:34,798 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-12 06:23:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-12 06:23:35,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:52,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138281219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:52,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:23:52,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 46 [2022-07-12 06:23:52,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311925344] [2022-07-12 06:23:52,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:52,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-12 06:23:52,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:52,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-12 06:23:52,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=4169, Unknown=6, NotChecked=0, Total=4422 [2022-07-12 06:23:52,448 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-12 06:23:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:53,284 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2022-07-12 06:23:53,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-12 06:23:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) Word has length 83 [2022-07-12 06:23:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:53,285 INFO L225 Difference]: With dead ends: 84 [2022-07-12 06:23:53,286 INFO L226 Difference]: Without dead ends: 80 [2022-07-12 06:23:53,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 111 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=486, Invalid=5828, Unknown=6, NotChecked=0, Total=6320 [2022-07-12 06:23:53,287 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:53,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 386 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 921 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:23:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-12 06:23:53,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-12 06:23:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2022-07-12 06:23:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2022-07-12 06:23:53,292 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 83 [2022-07-12 06:23:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:53,293 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2022-07-12 06:23:53,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-12 06:23:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2022-07-12 06:23:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 06:23:53,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:53,294 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:23:53,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-12 06:23:53,507 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 [2022-07-12 06:23:53,507 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1179471462, now seen corresponding path program 12 times [2022-07-12 06:23:53,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:53,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807653357] [2022-07-12 06:23:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:53,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:53,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:53,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:53,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:53,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-12 06:23:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:53,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:53,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:53,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:53,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 18 proven. 62 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-12 06:23:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:53,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807653357] [2022-07-12 06:23:53,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807653357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:53,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497150825] [2022-07-12 06:23:53,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:23:53,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:53,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:53,876 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) [2022-07-12 06:23:53,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 06:23:53,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-12 06:23:53,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:23:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-12 06:23:53,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:23:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-12 06:23:54,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:23:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 96 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 06:23:56,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497150825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:23:56,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:23:56,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 26] total 63 [2022-07-12 06:23:56,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221371936] [2022-07-12 06:23:56,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:23:56,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-12 06:23:56,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:23:56,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-12 06:23:56,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3657, Unknown=0, NotChecked=0, Total=3906 [2022-07-12 06:23:56,280 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 63 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 42 states have internal predecessors, (86), 12 states have call successors, (12), 1 states have call predecessors, (12), 19 states have return successors, (21), 21 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-12 06:23:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:23:57,481 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2022-07-12 06:23:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-12 06:23:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 42 states have internal predecessors, (86), 12 states have call successors, (12), 1 states have call predecessors, (12), 19 states have return successors, (21), 21 states have call predecessors, (21), 12 states have call successors, (21) Word has length 55 [2022-07-12 06:23:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:23:57,482 INFO L225 Difference]: With dead ends: 88 [2022-07-12 06:23:57,482 INFO L226 Difference]: Without dead ends: 84 [2022-07-12 06:23:57,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=711, Invalid=6429, Unknown=0, NotChecked=0, Total=7140 [2022-07-12 06:23:57,485 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 06:23:57,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 501 Invalid, 1514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 06:23:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-12 06:23:57,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-07-12 06:23:57,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (33), 20 states have call predecessors, (33), 8 states have call successors, (33) [2022-07-12 06:23:57,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2022-07-12 06:23:57,494 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 55 [2022-07-12 06:23:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:23:57,494 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2022-07-12 06:23:57,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 42 states have internal predecessors, (86), 12 states have call successors, (12), 1 states have call predecessors, (12), 19 states have return successors, (21), 21 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-12 06:23:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2022-07-12 06:23:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-12 06:23:57,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:23:57,499 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:23:57,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 06:23:57,715 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 [2022-07-12 06:23:57,716 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:23:57,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:23:57,716 INFO L85 PathProgramCache]: Analyzing trace with hash -43543002, now seen corresponding path program 13 times [2022-07-12 06:23:57,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:23:57,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227563069] [2022-07-12 06:23:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:23:57,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:23:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:57,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:23:57,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:57,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:57,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:57,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:57,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 06:23:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:23:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-12 06:23:58,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:23:58,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227563069] [2022-07-12 06:23:58,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227563069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:23:58,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26797005] [2022-07-12 06:23:58,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:23:58,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:23:58,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:23:58,760 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) [2022-07-12 06:23:58,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 06:23:58,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:23:58,856 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2022-07-12 06:23:58,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-07-12 06:24:00,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:18,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26797005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:18,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:24:18,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2022-07-12 06:24:18,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093949720] [2022-07-12 06:24:18,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:18,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-12 06:24:18,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:18,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-12 06:24:18,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=7496, Unknown=6, NotChecked=0, Total=7832 [2022-07-12 06:24:18,047 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) [2022-07-12 06:24:19,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:19,602 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2022-07-12 06:24:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 06:24:19,602 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) Word has length 111 [2022-07-12 06:24:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:19,604 INFO L225 Difference]: With dead ends: 90 [2022-07-12 06:24:19,604 INFO L226 Difference]: Without dead ends: 86 [2022-07-12 06:24:19,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 155 SyntacticMatches, 15 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=757, Invalid=10793, Unknown=6, NotChecked=0, Total=11556 [2022-07-12 06:24:19,606 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:19,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 645 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 06:24:19,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-12 06:24:19,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-07-12 06:24:19,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 17 states have return successors, (38), 21 states have call predecessors, (38), 8 states have call successors, (38) [2022-07-12 06:24:19,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-07-12 06:24:19,614 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 111 [2022-07-12 06:24:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:19,614 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-07-12 06:24:19,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 35 states have internal predecessors, (67), 5 states have call successors, (5), 1 states have call predecessors, (5), 24 states have return successors, (25), 25 states have call predecessors, (25), 5 states have call successors, (25) [2022-07-12 06:24:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-07-12 06:24:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 06:24:19,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:19,617 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:24:19,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:19,831 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 [2022-07-12 06:24:19,832 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 14 times [2022-07-12 06:24:19,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:19,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685201780] [2022-07-12 06:24:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:19,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:19,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:19,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:19,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 06:24:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-12 06:24:20,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:20,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685201780] [2022-07-12 06:24:20,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685201780] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:20,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323547839] [2022-07-12 06:24:20,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:24:20,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:20,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:20,652 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) [2022-07-12 06:24:20,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 06:24:20,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:24:20,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:20,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-12 06:24:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 201 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-07-12 06:24:21,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:29,039 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-12 06:24:29,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323547839] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:24:29,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:24:29,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 40] total 81 [2022-07-12 06:24:29,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246573359] [2022-07-12 06:24:29,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:29,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-12 06:24:29,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-12 06:24:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=6179, Unknown=1, NotChecked=0, Total=6480 [2022-07-12 06:24:29,041 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 81 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 48 states have internal predecessors, (108), 16 states have call successors, (16), 1 states have call predecessors, (16), 24 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2022-07-12 06:24:30,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:30,802 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2022-07-12 06:24:30,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-12 06:24:30,802 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 48 states have internal predecessors, (108), 16 states have call successors, (16), 1 states have call predecessors, (16), 24 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) Word has length 90 [2022-07-12 06:24:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:30,803 INFO L225 Difference]: With dead ends: 102 [2022-07-12 06:24:30,803 INFO L226 Difference]: Without dead ends: 96 [2022-07-12 06:24:30,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 144 SyntacticMatches, 12 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=836, Invalid=10719, Unknown=1, NotChecked=0, Total=11556 [2022-07-12 06:24:30,806 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2027 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:30,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 715 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2027 Invalid, 0 Unknown, 2 Unchecked, 0.9s Time] [2022-07-12 06:24:30,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-12 06:24:30,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2022-07-12 06:24:30,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (36), 22 states have call predecessors, (36), 8 states have call successors, (36) [2022-07-12 06:24:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2022-07-12 06:24:30,812 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 90 [2022-07-12 06:24:30,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:30,813 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2022-07-12 06:24:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 76 states have (on average 1.4210526315789473) internal successors, (108), 48 states have internal predecessors, (108), 16 states have call successors, (16), 1 states have call predecessors, (16), 24 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2022-07-12 06:24:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2022-07-12 06:24:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-12 06:24:30,815 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:30,815 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:24:30,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:31,034 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 [2022-07-12 06:24:31,034 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:31,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1533046684, now seen corresponding path program 15 times [2022-07-12 06:24:31,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:31,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334224245] [2022-07-12 06:24:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:31,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-12 06:24:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-12 06:24:31,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334224245] [2022-07-12 06:24:31,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334224245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:31,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616452107] [2022-07-12 06:24:31,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 06:24:31,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:31,887 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) [2022-07-12 06:24:31,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 06:24:31,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-12 06:24:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:31,990 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-12 06:24:31,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 9 proven. 195 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-07-12 06:24:32,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:24:51,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616452107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:51,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:24:51,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2022-07-12 06:24:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939898634] [2022-07-12 06:24:51,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:24:51,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-12 06:24:51,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:24:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-12 06:24:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4704, Unknown=7, NotChecked=0, Total=4970 [2022-07-12 06:24:51,670 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 50 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2022-07-12 06:24:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:24:52,463 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-07-12 06:24:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-12 06:24:52,463 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) Word has length 90 [2022-07-12 06:24:52,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:24:52,464 INFO L225 Difference]: With dead ends: 92 [2022-07-12 06:24:52,464 INFO L226 Difference]: Without dead ends: 88 [2022-07-12 06:24:52,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 116 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=536, Invalid=6767, Unknown=7, NotChecked=0, Total=7310 [2022-07-12 06:24:52,466 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 06:24:52,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 543 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 06:24:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-12 06:24:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-07-12 06:24:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (36), 22 states have call predecessors, (36), 8 states have call successors, (36) [2022-07-12 06:24:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2022-07-12 06:24:52,473 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 90 [2022-07-12 06:24:52,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:24:52,474 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2022-07-12 06:24:52,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2022-07-12 06:24:52,474 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2022-07-12 06:24:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-12 06:24:52,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:24:52,475 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:24:52,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 06:24:52,691 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 [2022-07-12 06:24:52,692 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:24:52,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:24:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash 960528734, now seen corresponding path program 16 times [2022-07-12 06:24:52,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:24:52,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546667385] [2022-07-12 06:24:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:24:52,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:24:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:52,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:24:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:52,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:52,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:52,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:52,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 06:24:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:24:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:24:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-12 06:24:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:24:53,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546667385] [2022-07-12 06:24:53,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546667385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:24:53,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653743205] [2022-07-12 06:24:53,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 06:24:53,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:24:53,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:24:53,916 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) [2022-07-12 06:24:53,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 06:24:54,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 06:24:54,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:24:54,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 193 conjunts are in the unsatisfiable core [2022-07-12 06:24:54,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:24:55,638 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-07-12 06:24:55,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:25:15,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653743205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:15,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:25:15,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 28] total 64 [2022-07-12 06:25:15,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400612316] [2022-07-12 06:25:15,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:25:15,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-12 06:25:15,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:25:15,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-12 06:25:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=8571, Unknown=7, NotChecked=0, Total=8930 [2022-07-12 06:25:15,829 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 64 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 37 states have internal predecessors, (71), 5 states have call successors, (5), 1 states have call predecessors, (5), 26 states have return successors, (27), 27 states have call predecessors, (27), 5 states have call successors, (27) [2022-07-12 06:25:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:25:17,749 INFO L93 Difference]: Finished difference Result 98 states and 124 transitions. [2022-07-12 06:25:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 06:25:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 37 states have internal predecessors, (71), 5 states have call successors, (5), 1 states have call predecessors, (5), 26 states have return successors, (27), 27 states have call predecessors, (27), 5 states have call successors, (27) Word has length 118 [2022-07-12 06:25:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:25:17,751 INFO L225 Difference]: With dead ends: 98 [2022-07-12 06:25:17,751 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 06:25:17,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 168 SyntacticMatches, 14 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2914 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=845, Invalid=12488, Unknown=7, NotChecked=0, Total=13340 [2022-07-12 06:25:17,752 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 06:25:17,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 744 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 06:25:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 06:25:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2022-07-12 06:25:17,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 9 states have call successors, (9), 3 states have call predecessors, (9), 19 states have return successors, (43), 24 states have call predecessors, (43), 9 states have call successors, (43) [2022-07-12 06:25:17,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 113 transitions. [2022-07-12 06:25:17,759 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 113 transitions. Word has length 118 [2022-07-12 06:25:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:25:17,759 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 113 transitions. [2022-07-12 06:25:17,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 37 states have internal predecessors, (71), 5 states have call successors, (5), 1 states have call predecessors, (5), 26 states have return successors, (27), 27 states have call predecessors, (27), 5 states have call successors, (27) [2022-07-12 06:25:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 113 transitions. [2022-07-12 06:25:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-12 06:25:17,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:25:17,761 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:25:17,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 06:25:17,975 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 [2022-07-12 06:25:17,975 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:25:17,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:25:17,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1089292936, now seen corresponding path program 17 times [2022-07-12 06:25:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:25:17,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924124108] [2022-07-12 06:25:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:25:17,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:25:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-12 06:25:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:18,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:19,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-07-12 06:25:19,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:25:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924124108] [2022-07-12 06:25:19,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924124108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:19,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114762074] [2022-07-12 06:25:19,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 06:25:19,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:25:19,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:25:19,085 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) [2022-07-12 06:25:19,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 06:25:19,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-12 06:25:19,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:25:19,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2022-07-12 06:25:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:25:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 9 proven. 408 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-07-12 06:25:20,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:25:42,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114762074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:42,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:25:42,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 28] total 66 [2022-07-12 06:25:42,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134756978] [2022-07-12 06:25:42,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:25:42,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-12 06:25:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:25:42,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-12 06:25:42,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=8945, Unknown=7, NotChecked=0, Total=9312 [2022-07-12 06:25:42,625 INFO L87 Difference]: Start difference. First operand 87 states and 113 transitions. Second operand has 66 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 38 states have internal predecessors, (73), 5 states have call successors, (5), 1 states have call predecessors, (5), 27 states have return successors, (28), 28 states have call predecessors, (28), 5 states have call successors, (28) [2022-07-12 06:25:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:25:44,511 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2022-07-12 06:25:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-12 06:25:44,512 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 38 states have internal predecessors, (73), 5 states have call successors, (5), 1 states have call predecessors, (5), 27 states have return successors, (28), 28 states have call predecessors, (28), 5 states have call successors, (28) Word has length 125 [2022-07-12 06:25:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:25:44,512 INFO L225 Difference]: With dead ends: 98 [2022-07-12 06:25:44,512 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 06:25:44,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 171 SyntacticMatches, 20 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3040 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=855, Invalid=12944, Unknown=7, NotChecked=0, Total=13806 [2022-07-12 06:25:44,514 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 31 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1940 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 06:25:44,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 890 Invalid, 1970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1940 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 06:25:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 06:25:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-07-12 06:25:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 8 states have call successors, (8), 3 states have call predecessors, (8), 19 states have return successors, (41), 23 states have call predecessors, (41), 8 states have call successors, (41) [2022-07-12 06:25:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2022-07-12 06:25:44,528 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 125 [2022-07-12 06:25:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:25:44,528 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2022-07-12 06:25:44,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 38 states have internal predecessors, (73), 5 states have call successors, (5), 1 states have call predecessors, (5), 27 states have return successors, (28), 28 states have call predecessors, (28), 5 states have call successors, (28) [2022-07-12 06:25:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2022-07-12 06:25:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-12 06:25:44,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:25:44,530 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:25:44,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 06:25:44,730 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 [2022-07-12 06:25:44,730 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:25:44,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:25:44,731 INFO L85 PathProgramCache]: Analyzing trace with hash -401646488, now seen corresponding path program 18 times [2022-07-12 06:25:44,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:25:44,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311146476] [2022-07-12 06:25:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:25:44,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:25:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:44,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:44,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:44,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-12 06:25:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:44,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:45,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-12 06:25:45,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:25:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311146476] [2022-07-12 06:25:45,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311146476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:45,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735471796] [2022-07-12 06:25:45,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 06:25:45,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:25:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:25:45,544 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) [2022-07-12 06:25:45,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 06:25:45,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-12 06:25:45,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:25:45,672 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 157 conjunts are in the unsatisfiable core [2022-07-12 06:25:45,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:25:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 18 proven. 229 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-12 06:25:46,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:25:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-12 06:25:49,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735471796] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 06:25:49,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 06:25:49,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 27, 41] total 84 [2022-07-12 06:25:49,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047482442] [2022-07-12 06:25:49,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 06:25:49,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-12 06:25:49,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:25:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-12 06:25:49,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6671, Unknown=0, NotChecked=0, Total=6972 [2022-07-12 06:25:49,963 INFO L87 Difference]: Start difference. First operand 85 states and 109 transitions. Second operand has 84 states, 80 states have (on average 1.425) internal successors, (114), 48 states have internal predecessors, (114), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2022-07-12 06:25:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:25:51,973 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2022-07-12 06:25:51,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-12 06:25:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 80 states have (on average 1.425) internal successors, (114), 48 states have internal predecessors, (114), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) Word has length 97 [2022-07-12 06:25:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:25:51,974 INFO L225 Difference]: With dead ends: 108 [2022-07-12 06:25:51,975 INFO L226 Difference]: Without dead ends: 102 [2022-07-12 06:25:51,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 156 SyntacticMatches, 14 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=864, Invalid=11792, Unknown=0, NotChecked=0, Total=12656 [2022-07-12 06:25:51,976 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 2245 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 2451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 06:25:51,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 739 Invalid, 2451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2245 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 06:25:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-12 06:25:51,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2022-07-12 06:25:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (39), 24 states have call predecessors, (39), 8 states have call successors, (39) [2022-07-12 06:25:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-07-12 06:25:51,982 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 97 [2022-07-12 06:25:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:25:51,982 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-07-12 06:25:51,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 80 states have (on average 1.425) internal successors, (114), 48 states have internal predecessors, (114), 17 states have call successors, (17), 1 states have call predecessors, (17), 25 states have return successors, (37), 36 states have call predecessors, (37), 17 states have call successors, (37) [2022-07-12 06:25:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-07-12 06:25:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-12 06:25:51,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:25:51,983 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:25:52,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 06:25:52,183 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 [2022-07-12 06:25:52,183 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:25:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:25:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash -14301802, now seen corresponding path program 19 times [2022-07-12 06:25:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:25:52,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589482692] [2022-07-12 06:25:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:25:52,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:25:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:25:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-12 06:25:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:25:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 253 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-12 06:25:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:25:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589482692] [2022-07-12 06:25:52,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589482692] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:25:52,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288600051] [2022-07-12 06:25:52,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 06:25:52,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:25:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:25:52,988 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:25:52,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 06:25:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:25:53,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 157 conjunts are in the unsatisfiable core [2022-07-12 06:25:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:25:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 4 proven. 237 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-07-12 06:25:53,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 06:26:17,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288600051] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:17,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-12 06:26:17,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24] total 54 [2022-07-12 06:26:17,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695699903] [2022-07-12 06:26:17,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-12 06:26:17,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-12 06:26:17,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 06:26:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-12 06:26:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5272, Unknown=7, NotChecked=0, Total=5550 [2022-07-12 06:26:17,771 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 54 states, 51 states have (on average 1.196078431372549) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 1 states have call predecessors, (5), 21 states have return successors, (22), 22 states have call predecessors, (22), 5 states have call successors, (22) [2022-07-12 06:26:19,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 06:26:19,148 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-07-12 06:26:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 06:26:19,148 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.196078431372549) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 1 states have call predecessors, (5), 21 states have return successors, (22), 22 states have call predecessors, (22), 5 states have call successors, (22) Word has length 97 [2022-07-12 06:26:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 06:26:19,149 INFO L225 Difference]: With dead ends: 98 [2022-07-12 06:26:19,149 INFO L226 Difference]: Without dead ends: 94 [2022-07-12 06:26:19,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=586, Invalid=7779, Unknown=7, NotChecked=0, Total=8372 [2022-07-12 06:26:19,149 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 06:26:19,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 597 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 06:26:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-12 06:26:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2022-07-12 06:26:19,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (39), 24 states have call predecessors, (39), 8 states have call successors, (39) [2022-07-12 06:26:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-07-12 06:26:19,155 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 97 [2022-07-12 06:26:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 06:26:19,155 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-07-12 06:26:19,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.196078431372549) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 1 states have call predecessors, (5), 21 states have return successors, (22), 22 states have call predecessors, (22), 5 states have call successors, (22) [2022-07-12 06:26:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-07-12 06:26:19,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-12 06:26:19,156 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 06:26:19,156 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 06:26:19,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 06:26:19,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-12 06:26:19,371 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 06:26:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 06:26:19,372 INFO L85 PathProgramCache]: Analyzing trace with hash 246789366, now seen corresponding path program 20 times [2022-07-12 06:26:19,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 06:26:19,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517209436] [2022-07-12 06:26:19,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 06:26:19,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 06:26:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-12 06:26:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-12 06:26:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:19,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:20,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:20,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:20,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:20,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:20,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:20,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:20,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-12 06:26:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 06:26:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-07-12 06:26:20,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 06:26:20,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517209436] [2022-07-12 06:26:20,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517209436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 06:26:20,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977897880] [2022-07-12 06:26:20,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 06:26:20,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 06:26:20,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 06:26:20,688 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 06:26:20,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 06:26:20,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 06:26:20,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 06:26:20,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2022-07-12 06:26:20,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 06:26:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 410 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-12 06:26:22,713 INFO L328 TraceCheckSpWp]: Computing backward predicates...