./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 f4b24e32 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-?-f4b24e3 [2022-07-13 18:01:46,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 18:01:46,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 18:01:46,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 18:01:46,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 18:01:46,340 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 18:01:46,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 18:01:46,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 18:01:46,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 18:01:46,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 18:01:46,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 18:01:46,362 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 18:01:46,362 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 18:01:46,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 18:01:46,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 18:01:46,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 18:01:46,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 18:01:46,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 18:01:46,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 18:01:46,376 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 18:01:46,380 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 18:01:46,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 18:01:46,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 18:01:46,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 18:01:46,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 18:01:46,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 18:01:46,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 18:01:46,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 18:01:46,390 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 18:01:46,391 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 18:01:46,392 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 18:01:46,392 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 18:01:46,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 18:01:46,394 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 18:01:46,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 18:01:46,395 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 18:01:46,395 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 18:01:46,396 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 18:01:46,396 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 18:01:46,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 18:01:46,397 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 18:01:46,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 18:01:46,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 18:01:46,423 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 18:01:46,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 18:01:46,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 18:01:46,424 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 18:01:46,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 18:01:46,425 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 18:01:46,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 18:01:46,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 18:01:46,426 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 18:01:46,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 18:01:46,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 18:01:46,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 18:01:46,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 18:01:46,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 18:01:46,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 18:01:46,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 18:01:46,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 18:01:46,428 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 18:01:46,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 18:01:46,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 18:01:46,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 18:01:46,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 18:01:46,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 18:01:46,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 18:01:46,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:01:46,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 18:01:46,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 18:01:46,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 18:01:46,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 18:01:46,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 18:01:46,431 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 18:01:46,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 18:01:46,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 18:01:46,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2022-07-13 18:01:46,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 18:01:46,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 18:01:46,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 18:01:46,665 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 18:01:46,666 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 18:01:46,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2022-07-13 18:01:46,761 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f85c594/9b2f9d7aac074b40824e9ca8bfc06aa9/FLAG121970b00 [2022-07-13 18:01:47,065 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 18:01:47,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2022-07-13 18:01:47,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f85c594/9b2f9d7aac074b40824e9ca8bfc06aa9/FLAG121970b00 [2022-07-13 18:01:47,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1f85c594/9b2f9d7aac074b40824e9ca8bfc06aa9 [2022-07-13 18:01:47,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 18:01:47,517 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 18:01:47,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 18:01:47,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 18:01:47,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 18:01:47,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5333e09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47, skipping insertion in model container [2022-07-13 18:01:47,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 18:01:47,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 18:01:47,687 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] [2022-07-13 18:01:47,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:01:47,700 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 18:01:47,719 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] [2022-07-13 18:01:47,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 18:01:47,735 INFO L208 MainTranslator]: Completed translation [2022-07-13 18:01:47,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47 WrapperNode [2022-07-13 18:01:47,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 18:01:47,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 18:01:47,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 18:01:47,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 18:01:47,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,759 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-07-13 18:01:47,760 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 18:01:47,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 18:01:47,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 18:01:47,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 18:01:47,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 18:01:47,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 18:01:47,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 18:01:47,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 18:01:47,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (1/1) ... [2022-07-13 18:01:47,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 18:01:47,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:01:47,816 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) [2022-07-13 18:01:47,821 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 [2022-07-13 18:01:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 18:01:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-07-13 18:01:47,852 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-07-13 18:01:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 18:01:47,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 18:01:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 18:01:47,898 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 18:01:47,900 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 18:01:48,029 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 18:01:48,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 18:01:48,033 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 18:01:48,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:01:48 BoogieIcfgContainer [2022-07-13 18:01:48,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 18:01:48,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 18:01:48,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 18:01:48,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 18:01:48,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:01:47" (1/3) ... [2022-07-13 18:01:48,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34724f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:01:48, skipping insertion in model container [2022-07-13 18:01:48,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:01:47" (2/3) ... [2022-07-13 18:01:48,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34724f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:01:48, skipping insertion in model container [2022-07-13 18:01:48,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:01:48" (3/3) ... [2022-07-13 18:01:48,041 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2022-07-13 18:01:48,050 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 18:01:48,051 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 18:01:48,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 18:01:48,085 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@124e7a0c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4cc8feb1 [2022-07-13 18:01:48,085 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 18:01:48,088 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) [2022-07-13 18:01:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 18:01:48,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:48,094 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 18:01:48,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2022-07-13 18:01:48,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:48,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140022337] [2022-07-13 18:01:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:48,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:48,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:01:48,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:48,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 18:01:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 18:01:48,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140022337] [2022-07-13 18:01:48,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140022337] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:01:48,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:01:48,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 18:01:48,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63007621] [2022-07-13 18:01:48,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:01:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 18:01:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 18:01:48,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 18:01:48,406 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) [2022-07-13 18:01:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:48,532 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2022-07-13 18:01:48,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:01:48,535 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 [2022-07-13 18:01:48,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:48,540 INFO L225 Difference]: With dead ends: 44 [2022-07-13 18:01:48,540 INFO L226 Difference]: Without dead ends: 28 [2022-07-13 18:01:48,542 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 [2022-07-13 18:01:48,545 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:01:48,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 18:01:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-13 18:01:48,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-13 18:01:48,588 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) [2022-07-13 18:01:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-07-13 18:01:48,597 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2022-07-13 18:01:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:48,597 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-07-13 18:01:48,597 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) [2022-07-13 18:01:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-07-13 18:01:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 18:01:48,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:48,599 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] [2022-07-13 18:01:48,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 18:01:48,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:48,600 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2022-07-13 18:01:48,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:48,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52716629] [2022-07-13 18:01:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:48,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:48,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:01:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:48,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 18:01:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:48,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:01:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 18:01:48,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52716629] [2022-07-13 18:01:48,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52716629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:01:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817314632] [2022-07-13 18:01:48,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:48,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:01:48,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:01:48,765 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) [2022-07-13 18:01:48,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 18:01:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 18:01:48,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:01:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:01:48,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:01:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 18:01:48,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817314632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:01:48,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:01:48,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-07-13 18:01:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858931980] [2022-07-13 18:01:48,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:01:48,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 18:01:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 18:01:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-13 18:01:48,957 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) [2022-07-13 18:01:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:49,102 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2022-07-13 18:01:49,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 18:01:49,105 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 [2022-07-13 18:01:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:49,105 INFO L225 Difference]: With dead ends: 52 [2022-07-13 18:01:49,105 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 18:01:49,107 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 [2022-07-13 18:01:49,107 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 [2022-07-13 18:01:49,108 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] [2022-07-13 18:01:49,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 18:01:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-13 18:01:49,112 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) [2022-07-13 18:01:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-13 18:01:49,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 26 [2022-07-13 18:01:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:49,114 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-13 18:01:49,114 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) [2022-07-13 18:01:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-07-13 18:01:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-13 18:01:49,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:49,115 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] [2022-07-13 18:01:49,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 18:01:49,332 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 [2022-07-13 18:01:49,333 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:49,334 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 1 times [2022-07-13 18:01:49,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:49,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215511401] [2022-07-13 18:01:49,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:49,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:01:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 18:01:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,404 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-13 18:01:49,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:49,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215511401] [2022-07-13 18:01:49,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215511401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 18:01:49,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 18:01:49,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 18:01:49,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746286730] [2022-07-13 18:01:49,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 18:01:49,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 18:01:49,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:49,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 18:01:49,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 18:01:49,410 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) [2022-07-13 18:01:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:49,448 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-07-13 18:01:49,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 18:01:49,448 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 [2022-07-13 18:01:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:49,449 INFO L225 Difference]: With dead ends: 31 [2022-07-13 18:01:49,449 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 18:01:49,450 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 [2022-07-13 18:01:49,450 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 [2022-07-13 18:01:49,451 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] [2022-07-13 18:01:49,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 18:01:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 18:01:49,455 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) [2022-07-13 18:01:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-13 18:01:49,455 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 27 [2022-07-13 18:01:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:49,456 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-13 18:01:49,456 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) [2022-07-13 18:01:49,456 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-13 18:01:49,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-13 18:01:49,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:49,457 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] [2022-07-13 18:01:49,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 18:01:49,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:49,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 2 times [2022-07-13 18:01:49,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:49,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158272324] [2022-07-13 18:01:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:49,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:01:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 18:01:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 18:01:49,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158272324] [2022-07-13 18:01:49,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158272324] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:01:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270510738] [2022-07-13 18:01:49,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:01:49,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:01:49,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:01:49,786 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) [2022-07-13 18:01:49,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 18:01:49,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:01:49,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:01:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-13 18:01:49,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:01:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-13 18:01:50,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:01:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 18:01:50,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270510738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:01:50,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:01:50,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 35 [2022-07-13 18:01:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623093152] [2022-07-13 18:01:50,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:01:50,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 18:01:50,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:50,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 18:01:50,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 18:01:50,863 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) [2022-07-13 18:01:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:51,241 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-07-13 18:01:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 18:01:51,242 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 [2022-07-13 18:01:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:51,243 INFO L225 Difference]: With dead ends: 40 [2022-07-13 18:01:51,243 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 18:01:51,244 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 [2022-07-13 18:01:51,244 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:01:51,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 174 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 18:01:51,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 18:01:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-13 18:01:51,250 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) [2022-07-13 18:01:51,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-07-13 18:01:51,251 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 34 [2022-07-13 18:01:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:51,251 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-07-13 18:01:51,251 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) [2022-07-13 18:01:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-07-13 18:01:51,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-13 18:01:51,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:51,252 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] [2022-07-13 18:01:51,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 18:01:51,467 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 [2022-07-13 18:01:51,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:51,468 INFO L85 PathProgramCache]: Analyzing trace with hash -757286924, now seen corresponding path program 1 times [2022-07-13 18:01:51,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:51,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639754106] [2022-07-13 18:01:51,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:51,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:51,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:01:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:51,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:51,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 18:01:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:51,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:51,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 18:01:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:51,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 18:01:51,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639754106] [2022-07-13 18:01:51,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639754106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:01:51,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648457212] [2022-07-13 18:01:51,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:51,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:01:51,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:01:51,573 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) [2022-07-13 18:01:51,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 18:01:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 18:01:51,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:01:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-13 18:01:51,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:01:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-13 18:01:51,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648457212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:01:51,756 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:01:51,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-07-13 18:01:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103121784] [2022-07-13 18:01:51,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:01:51,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 18:01:51,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 18:01:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-07-13 18:01:51,758 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) [2022-07-13 18:01:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:51,811 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-07-13 18:01:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 18:01:51,812 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 [2022-07-13 18:01:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:51,812 INFO L225 Difference]: With dead ends: 54 [2022-07-13 18:01:51,812 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 18:01:51,813 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 [2022-07-13 18:01:51,814 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 [2022-07-13 18:01:51,814 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] [2022-07-13 18:01:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 18:01:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-13 18:01:51,817 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) [2022-07-13 18:01:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-13 18:01:51,817 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 47 [2022-07-13 18:01:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:51,817 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-13 18:01:51,817 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) [2022-07-13 18:01:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-13 18:01:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 18:01:51,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:51,818 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] [2022-07-13 18:01:51,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 18:01:52,035 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 [2022-07-13 18:01:52,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:52,036 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 3 times [2022-07-13 18:01:52,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:52,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001354049] [2022-07-13 18:01:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:52,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:52,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:01:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:52,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:52,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 18:01:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:52,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:52,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-13 18:01:52,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:52,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001354049] [2022-07-13 18:01:52,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001354049] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:01:52,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182126370] [2022-07-13 18:01:52,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:01:52,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:01:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:01:52,292 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) [2022-07-13 18:01:52,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 18:01:52,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-13 18:01:52,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:01:52,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-13 18:01:52,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:01:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 18:01:52,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:01:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-13 18:01:53,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182126370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:01:53,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:01:53,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 49 [2022-07-13 18:01:53,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103612453] [2022-07-13 18:01:53,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:01:53,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 18:01:53,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 18:01:53,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 18:01:53,977 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) [2022-07-13 18:01:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:01:54,997 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-07-13 18:01:54,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 18:01:54,999 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 [2022-07-13 18:01:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:01:55,001 INFO L225 Difference]: With dead ends: 58 [2022-07-13 18:01:55,003 INFO L226 Difference]: Without dead ends: 52 [2022-07-13 18:01:55,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=469, Invalid=3821, Unknown=0, NotChecked=0, Total=4290 [2022-07-13 18:01:55,005 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:01:55,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 349 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:01:55,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-13 18:01:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-07-13 18:01:55,014 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) [2022-07-13 18:01:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-07-13 18:01:55,017 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 41 [2022-07-13 18:01:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:01:55,017 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-07-13 18:01:55,018 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) [2022-07-13 18:01:55,018 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-07-13 18:01:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 18:01:55,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:01:55,022 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] [2022-07-13 18:01:55,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 18:01:55,235 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 [2022-07-13 18:01:55,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:01:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:01:55,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 4 times [2022-07-13 18:01:55,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:01:55,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955532982] [2022-07-13 18:01:55,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:01:55,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:01:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:55,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:01:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:55,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:55,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:55,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 18:01:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:55,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:55,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:01:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:01:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-13 18:01:55,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:01:55,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955532982] [2022-07-13 18:01:55,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955532982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:01:55,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693318513] [2022-07-13 18:01:55,649 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:01:55,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:01:55,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:01:55,650 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) [2022-07-13 18:01:55,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 18:01:55,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:01:55,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:01:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-13 18:01:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:01:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-13 18:01:56,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:01:59,710 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 [2022-07-13 18:01:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 12 not checked. [2022-07-13 18:01:59,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693318513] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:01:59,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:01:59,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 51 [2022-07-13 18:01:59,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658902664] [2022-07-13 18:01:59,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:01:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-13 18:01:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:01:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-13 18:01:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2269, Unknown=1, NotChecked=96, Total=2550 [2022-07-13 18:01:59,958 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) [2022-07-13 18:02:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:01,146 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-07-13 18:02:01,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 18:02:01,146 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 [2022-07-13 18:02:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:01,147 INFO L225 Difference]: With dead ends: 66 [2022-07-13 18:02:01,147 INFO L226 Difference]: Without dead ends: 58 [2022-07-13 18:02:01,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=437, Invalid=4258, Unknown=1, NotChecked=134, Total=4830 [2022-07-13 18:02:01,149 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:01,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 337 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1133 Invalid, 0 Unknown, 42 Unchecked, 0.6s Time] [2022-07-13 18:02:01,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-13 18:02:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-07-13 18:02:01,158 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) [2022-07-13 18:02:01,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-13 18:02:01,161 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 55 [2022-07-13 18:02:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:01,161 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-13 18:02:01,161 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) [2022-07-13 18:02:01,161 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-13 18:02:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-13 18:02:01,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:01,164 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] [2022-07-13 18:02:01,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:01,375 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 [2022-07-13 18:02:01,376 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:01,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:01,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1278690222, now seen corresponding path program 5 times [2022-07-13 18:02:01,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:01,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029212084] [2022-07-13 18:02:01,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 18:02:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-13 18:02:01,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029212084] [2022-07-13 18:02:01,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029212084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:01,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207845033] [2022-07-13 18:02:01,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:02:01,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:01,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:01,698 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) [2022-07-13 18:02:01,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 18:02:01,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-13 18:02:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:01,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-13 18:02:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:02,178 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-13 18:02:02,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 18:02:03,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207845033] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:03,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:03,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 23] total 53 [2022-07-13 18:02:03,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274169692] [2022-07-13 18:02:03,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:03,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 18:02:03,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 18:02:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2022-07-13 18:02:03,336 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) [2022-07-13 18:02:04,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:04,253 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-13 18:02:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 18:02:04,254 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 [2022-07-13 18:02:04,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:04,255 INFO L225 Difference]: With dead ends: 72 [2022-07-13 18:02:04,255 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 18:02:04,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=491, Invalid=4621, Unknown=0, NotChecked=0, Total=5112 [2022-07-13 18:02:04,257 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:04,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 220 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:02:04,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 18:02:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-13 18:02:04,271 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) [2022-07-13 18:02:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-07-13 18:02:04,274 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 48 [2022-07-13 18:02:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:04,274 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-07-13 18:02:04,275 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) [2022-07-13 18:02:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-07-13 18:02:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 18:02:04,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:04,276 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] [2022-07-13 18:02:04,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:04,492 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 [2022-07-13 18:02:04,493 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash 230391048, now seen corresponding path program 6 times [2022-07-13 18:02:04,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:04,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74568956] [2022-07-13 18:02:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:04,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:04,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 18:02:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 18:02:04,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74568956] [2022-07-13 18:02:04,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74568956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914263339] [2022-07-13 18:02:04,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:02:04,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:04,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:04,975 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) [2022-07-13 18:02:04,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 18:02:05,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-13 18:02:05,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:05,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-13 18:02:05,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-13 18:02:05,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 18:02:08,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914263339] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:08,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:08,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 30] total 62 [2022-07-13 18:02:08,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873100199] [2022-07-13 18:02:08,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:08,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-13 18:02:08,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-13 18:02:08,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3556, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 18:02:08,187 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) [2022-07-13 18:02:09,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:09,720 INFO L93 Difference]: Finished difference Result 84 states and 113 transitions. [2022-07-13 18:02:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 18:02:09,720 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 [2022-07-13 18:02:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:09,721 INFO L225 Difference]: With dead ends: 84 [2022-07-13 18:02:09,721 INFO L226 Difference]: Without dead ends: 76 [2022-07-13 18:02:09,723 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 [2022-07-13 18:02:09,724 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:09,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 617 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 18:02:09,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-13 18:02:09,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-07-13 18:02:09,736 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) [2022-07-13 18:02:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2022-07-13 18:02:09,737 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 69 [2022-07-13 18:02:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:09,738 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2022-07-13 18:02:09,738 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) [2022-07-13 18:02:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2022-07-13 18:02:09,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-13 18:02:09,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:09,739 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] [2022-07-13 18:02:09,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:09,940 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 [2022-07-13 18:02:09,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:09,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 7 times [2022-07-13 18:02:09,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:09,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869304376] [2022-07-13 18:02:09,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:09,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:09,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 18:02:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-13 18:02:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869304376] [2022-07-13 18:02:10,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869304376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:10,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532309272] [2022-07-13 18:02:10,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:02:10,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:10,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:10,556 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) [2022-07-13 18:02:10,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 18:02:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:10,611 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-13 18:02:10,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-13 18:02:11,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:16,132 WARN L833 $PredicateComparison]: unable to prove that (and (<= |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)))) (not (< |c_mult_#in~m| 0)) (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 [2022-07-13 18:02:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 187 refuted. 0 times theorem prover too weak. 47 trivial. 18 not checked. [2022-07-13 18:02:16,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532309272] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:16,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:16,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 34] total 69 [2022-07-13 18:02:16,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479921818] [2022-07-13 18:02:16,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:16,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-13 18:02:16,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:16,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-13 18:02:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=4309, Unknown=1, NotChecked=132, Total=4692 [2022-07-13 18:02:16,331 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand has 69 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 42 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) [2022-07-13 18:02:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:17,960 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2022-07-13 18:02:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 18:02:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 42 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 [2022-07-13 18:02:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:17,961 INFO L225 Difference]: With dead ends: 88 [2022-07-13 18:02:17,962 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 18:02:17,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=653, Invalid=7540, Unknown=1, NotChecked=178, Total=8372 [2022-07-13 18:02:17,964 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:17,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 575 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1788 Invalid, 0 Unknown, 57 Unchecked, 0.8s Time] [2022-07-13 18:02:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 18:02:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-13 18:02:17,971 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) [2022-07-13 18:02:17,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2022-07-13 18:02:17,971 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 76 [2022-07-13 18:02:17,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:17,972 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2022-07-13 18:02:17,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 42 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) [2022-07-13 18:02:17,972 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2022-07-13 18:02:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-13 18:02:17,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:17,973 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] [2022-07-13 18:02:17,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:18,189 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 [2022-07-13 18:02:18,190 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:18,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1821652060, now seen corresponding path program 8 times [2022-07-13 18:02:18,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:18,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368647036] [2022-07-13 18:02:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:18,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:18,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 18:02:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-13 18:02:18,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:18,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368647036] [2022-07-13 18:02:18,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368647036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:18,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057768308] [2022-07-13 18:02:18,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:02:18,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:18,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:18,676 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) [2022-07-13 18:02:18,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 18:02:18,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:02:18,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:18,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-13 18:02:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-07-13 18:02:19,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:02:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 18:02:20,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057768308] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:02:20,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:02:20,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 21] total 51 [2022-07-13 18:02:20,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496442288] [2022-07-13 18:02:20,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:02:20,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-13 18:02:20,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:02:20,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-13 18:02:20,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2369, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 18:02:20,714 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) [2022-07-13 18:02:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:02:21,946 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2022-07-13 18:02:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 18:02:21,946 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 [2022-07-13 18:02:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:02:21,947 INFO L225 Difference]: With dead ends: 96 [2022-07-13 18:02:21,947 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 18:02:21,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 103 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=457, Invalid=4655, Unknown=0, NotChecked=0, Total=5112 [2022-07-13 18:02:21,949 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 18:02:21,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 473 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 18:02:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 18:02:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2022-07-13 18:02:21,956 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) [2022-07-13 18:02:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2022-07-13 18:02:21,957 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 62 [2022-07-13 18:02:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:02:21,957 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2022-07-13 18:02:21,957 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) [2022-07-13 18:02:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2022-07-13 18:02:21,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 18:02:21,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:02:21,960 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] [2022-07-13 18:02:21,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 18:02:22,176 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 [2022-07-13 18:02:22,176 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:02:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:02:22,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 9 times [2022-07-13 18:02:22,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:02:22,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659564613] [2022-07-13 18:02:22,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:02:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:02:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:02:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 18:02:22,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:02:22,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:02:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-13 18:02:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:02:22,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659564613] [2022-07-13 18:02:22,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659564613] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:02:22,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210127923] [2022-07-13 18:02:22,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:02:22,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:02:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:02:22,908 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) [2022-07-13 18:02:22,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 18:02:23,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-13 18:02:23,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:02:23,011 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-13 18:02:23,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:02:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 20 proven. 174 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-13 18:02:24,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 33 proven. 259 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-13 18:03:41,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210127923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:03:41,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:03:41,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 40] total 80 [2022-07-13 18:03:41,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821935685] [2022-07-13 18:03:41,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:41,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-13 18:03:41,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:41,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-13 18:03:41,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=5985, Unknown=23, NotChecked=0, Total=6320 [2022-07-13 18:03:41,173 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) [2022-07-13 18:03:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:03:42,890 INFO L93 Difference]: Finished difference Result 100 states and 134 transitions. [2022-07-13 18:03:42,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 18:03:42,890 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 [2022-07-13 18:03:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:03:42,891 INFO L225 Difference]: With dead ends: 100 [2022-07-13 18:03:42,891 INFO L226 Difference]: Without dead ends: 94 [2022-07-13 18:03:42,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 76.9s TimeCoverageRelationStatistics Valid=853, Invalid=10044, Unknown=23, NotChecked=0, Total=10920 [2022-07-13 18:03:42,893 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 2063 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 18:03:42,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 706 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2063 Invalid, 0 Unknown, 42 Unchecked, 0.9s Time] [2022-07-13 18:03:42,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-13 18:03:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2022-07-13 18:03:42,901 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) [2022-07-13 18:03:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2022-07-13 18:03:42,901 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 83 [2022-07-13 18:03:42,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:03:42,902 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2022-07-13 18:03:42,902 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) [2022-07-13 18:03:42,902 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2022-07-13 18:03:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 18:03:42,903 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:03:42,903 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] [2022-07-13 18:03:42,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 18:03:43,115 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 [2022-07-13 18:03:43,116 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:03:43,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:03:43,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1108033402, now seen corresponding path program 10 times [2022-07-13 18:03:43,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:03:43,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3703790] [2022-07-13 18:03:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:03:43,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:03:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:03:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 18:03:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:03:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:03:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-13 18:03:43,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:03:43,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3703790] [2022-07-13 18:03:43,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3703790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:43,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317173087] [2022-07-13 18:03:43,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:03:43,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:03:43,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:03:43,772 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) [2022-07-13 18:03:43,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 18:03:43,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:03:43,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:03:43,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-13 18:03:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:03:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-13 18:03:44,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:03:59,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317173087] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:03:59,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:03:59,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 46 [2022-07-13 18:03:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426383189] [2022-07-13 18:03:59,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:03:59,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 18:03:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:03:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 18:03:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=4169, Unknown=6, NotChecked=0, Total=4422 [2022-07-13 18:03:59,822 INFO L87 Difference]: Start difference. First operand 80 states and 105 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) [2022-07-13 18:04:00,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:00,643 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2022-07-13 18:04:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 18:04:00,643 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 [2022-07-13 18:04:00,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:00,644 INFO L225 Difference]: With dead ends: 90 [2022-07-13 18:04:00,644 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 18:04:00,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 109 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=486, Invalid=5828, Unknown=6, NotChecked=0, Total=6320 [2022-07-13 18:04:00,645 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 18:04:00,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 427 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 18:04:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 18:04:00,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-07-13 18:04:00,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 16 states have return successors, (39), 21 states have call predecessors, (39), 10 states have call successors, (39) [2022-07-13 18:04:00,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2022-07-13 18:04:00,653 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 83 [2022-07-13 18:04:00,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:00,653 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2022-07-13 18:04:00,653 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) [2022-07-13 18:04:00,653 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2022-07-13 18:04:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-13 18:04:00,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:00,654 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] [2022-07-13 18:04:00,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:00,867 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 [2022-07-13 18:04:00,867 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:00,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1356577930, now seen corresponding path program 11 times [2022-07-13 18:04:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:00,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500456359] [2022-07-13 18:04:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:00,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:00,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:00,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:00,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:01,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-13 18:04:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:01,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:01,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:01,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:01,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-13 18:04:01,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:01,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500456359] [2022-07-13 18:04:01,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500456359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:01,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267225032] [2022-07-13 18:04:01,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:04:01,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:01,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:01,345 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) [2022-07-13 18:04:01,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 18:04:01,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-13 18:04:01,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:04:01,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-13 18:04:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-13 18:04:02,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:15,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267225032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:15,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:04:15,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 40 [2022-07-13 18:04:15,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324642691] [2022-07-13 18:04:15,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:15,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 18:04:15,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:15,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 18:04:15,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3429, Unknown=5, NotChecked=0, Total=3660 [2022-07-13 18:04:15,471 INFO L87 Difference]: Start difference. First operand 82 states and 108 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) [2022-07-13 18:04:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:16,136 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-07-13 18:04:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 18:04:16,136 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 [2022-07-13 18:04:16,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:16,137 INFO L225 Difference]: With dead ends: 90 [2022-07-13 18:04:16,137 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 18:04:16,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 95 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=425, Invalid=4682, Unknown=5, NotChecked=0, Total=5112 [2022-07-13 18:04:16,138 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 18:04:16,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 334 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 18:04:16,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 18:04:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-07-13 18:04:16,144 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) [2022-07-13 18:04:16,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2022-07-13 18:04:16,145 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 69 [2022-07-13 18:04:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:16,145 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2022-07-13 18:04:16,145 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) [2022-07-13 18:04:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2022-07-13 18:04:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-13 18:04:16,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:16,146 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] [2022-07-13 18:04:16,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:16,359 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 [2022-07-13 18:04:16,359 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:16,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:16,360 INFO L85 PathProgramCache]: Analyzing trace with hash -43543002, now seen corresponding path program 12 times [2022-07-13 18:04:16,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:16,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667432389] [2022-07-13 18:04:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:16,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 18:04:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:17,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:17,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:17,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:17,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:17,331 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-13 18:04:17,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667432389] [2022-07-13 18:04:17,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667432389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:17,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911894389] [2022-07-13 18:04:17,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:04:17,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:17,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:17,333 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) [2022-07-13 18:04:17,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 18:04:17,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-13 18:04:17,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:04:17,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2022-07-13 18:04:17,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-07-13 18:04:18,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:34,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911894389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:34,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:04:34,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2022-07-13 18:04:34,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483023633] [2022-07-13 18:04:34,366 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:34,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-13 18:04:34,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-13 18:04:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=7496, Unknown=6, NotChecked=0, Total=7832 [2022-07-13 18:04:34,368 INFO L87 Difference]: Start difference. First operand 76 states and 96 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) [2022-07-13 18:04:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:35,865 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-07-13 18:04:35,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 18:04:35,865 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 [2022-07-13 18:04:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:35,866 INFO L225 Difference]: With dead ends: 90 [2022-07-13 18:04:35,866 INFO L226 Difference]: Without dead ends: 86 [2022-07-13 18:04:35,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 156 SyntacticMatches, 14 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=757, Invalid=10793, Unknown=6, NotChecked=0, Total=11556 [2022-07-13 18:04:35,868 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 18:04:35,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 744 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 18:04:35,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-13 18:04:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-07-13 18:04:35,873 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, (39), 21 states have call predecessors, (39), 8 states have call successors, (39) [2022-07-13 18:04:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2022-07-13 18:04:35,874 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 111 [2022-07-13 18:04:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:35,874 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2022-07-13 18:04:35,874 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) [2022-07-13 18:04:35,875 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2022-07-13 18:04:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:04:35,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:35,876 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] [2022-07-13 18:04:35,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:36,091 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 [2022-07-13 18:04:36,091 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 13 times [2022-07-13 18:04:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:36,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047199911] [2022-07-13 18:04:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:36,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 18:04:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-13 18:04:36,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047199911] [2022-07-13 18:04:36,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047199911] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:36,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631489730] [2022-07-13 18:04:36,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 18:04:36,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:36,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:36,796 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) [2022-07-13 18:04:36,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 18:04:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:36,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-13 18:04:36,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:37,918 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 201 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-07-13 18:04:37,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:43,743 WARN L833 $PredicateComparison]: unable to prove that (and (<= |c_mult_#in~m| 0) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_159_92| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111| Int) (v_mult_~n_BEFORE_CALL_159 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165| Int)) (let ((.cse2 (div (+ (* (- 2) |c_mult_#res|) (* v_mult_~n_BEFORE_CALL_159 (- 2)) (* 16 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165|) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165|)) 8)) (.cse0 (* 8 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165|)) (.cse1 (div (+ (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165| 2) (* 2 |c_mult_#res|) (* (- 16) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165|) (* v_mult_~n_BEFORE_CALL_159 2)) (- 8)))) (or (<= 8 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165|) (< .cse0 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165| (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111| 8) |c_mult_#res|)) (< .cse1 |aux_div_v_mult_#in~n_BEFORE_CALL_159_92|) (< .cse2 .cse1) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111| .cse2) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165| 0) (< (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165| |c_mult_#res| (* 8 |aux_div_v_mult_#in~n_BEFORE_CALL_159_92|)) .cse0) (<= |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_165| .cse1)))) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_159_92| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137| Int) (v_mult_~n_BEFORE_CALL_159 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137| Int)) (let ((.cse4 (div (+ (* (- 16) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137|) (* 2 |c_mult_#res|) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137|) (* v_mult_~n_BEFORE_CALL_159 2)) (- 8))) (.cse3 (div (+ (* (- 2) |c_mult_#res|) (* v_mult_~n_BEFORE_CALL_159 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137| 2) (* 16 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137|)) 8)) (.cse5 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137| (* 8 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137|)))) (or (<= 8 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137|) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111| .cse3) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137| 0) (< .cse3 .cse4) (< (+ |c_mult_#res| (* 8 |aux_div_v_mult_#in~n_BEFORE_CALL_159_92|)) .cse5) (< .cse4 |aux_div_v_mult_#in~n_BEFORE_CALL_159_92|) (<= .cse3 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111_137|) (< .cse5 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_159_92_111| 8) |c_mult_#res|))))) (not (< |c_mult_#in~m| 0))) is different from false [2022-07-13 18:04:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 35 proven. 295 refuted. 0 times theorem prover too weak. 68 trivial. 22 not checked. [2022-07-13 18:04:43,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631489730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:04:43,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:04:43,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 40] total 81 [2022-07-13 18:04:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846128536] [2022-07-13 18:04:43,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:43,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-13 18:04:43,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-13 18:04:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=6029, Unknown=1, NotChecked=156, Total=6480 [2022-07-13 18:04:43,938 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 81 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 48 states have internal predecessors, (109), 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) [2022-07-13 18:04:46,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:46,083 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2022-07-13 18:04:46,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 18:04:46,084 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 48 states have internal predecessors, (109), 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 [2022-07-13 18:04:46,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:46,085 INFO L225 Difference]: With dead ends: 102 [2022-07-13 18:04:46,085 INFO L226 Difference]: Without dead ends: 96 [2022-07-13 18:04:46,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 141 SyntacticMatches, 14 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=829, Invalid=10516, Unknown=1, NotChecked=210, Total=11556 [2022-07-13 18:04:46,086 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 2807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 18:04:46,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 883 Invalid, 2807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2614 Invalid, 0 Unknown, 58 Unchecked, 1.2s Time] [2022-07-13 18:04:46,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-13 18:04:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2022-07-13 18:04:46,108 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, (37), 22 states have call predecessors, (37), 8 states have call successors, (37) [2022-07-13 18:04:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 103 transitions. [2022-07-13 18:04:46,108 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 103 transitions. Word has length 90 [2022-07-13 18:04:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:46,109 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 103 transitions. [2022-07-13 18:04:46,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 77 states have (on average 1.4155844155844155) internal successors, (109), 48 states have internal predecessors, (109), 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) [2022-07-13 18:04:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 103 transitions. [2022-07-13 18:04:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 18:04:46,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:46,110 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] [2022-07-13 18:04:46,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:46,324 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 [2022-07-13 18:04:46,324 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:46,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1179471462, now seen corresponding path program 14 times [2022-07-13 18:04:46,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:46,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247368539] [2022-07-13 18:04:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:46,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:46,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:46,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:46,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 18:04:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:46,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:46,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:46,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:46,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 18 proven. 62 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 18:04:46,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:46,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247368539] [2022-07-13 18:04:46,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247368539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:46,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578181291] [2022-07-13 18:04:46,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 18:04:46,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:46,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:46,684 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) [2022-07-13 18:04:46,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 18:04:46,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 18:04:46,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:04:46,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-13 18:04:46,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 18:04:47,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:04:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 96 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 18:04:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578181291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:04:49,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:04:49,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 26] total 63 [2022-07-13 18:04:49,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892925061] [2022-07-13 18:04:49,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:04:49,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-13 18:04:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:04:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-13 18:04:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3657, Unknown=0, NotChecked=0, Total=3906 [2022-07-13 18:04:49,057 INFO L87 Difference]: Start difference. First operand 82 states and 103 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) [2022-07-13 18:04:50,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:04:50,438 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2022-07-13 18:04:50,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 18:04:50,439 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 [2022-07-13 18:04:50,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:04:50,440 INFO L225 Difference]: With dead ends: 94 [2022-07-13 18:04:50,440 INFO L226 Difference]: Without dead ends: 90 [2022-07-13 18:04:50,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=711, Invalid=6429, Unknown=0, NotChecked=0, Total=7140 [2022-07-13 18:04:50,441 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 54 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 18:04:50,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 529 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 18:04:50,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-13 18:04:50,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-13 18:04:50,446 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) [2022-07-13 18:04:50,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2022-07-13 18:04:50,447 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 55 [2022-07-13 18:04:50,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:04:50,447 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2022-07-13 18:04:50,449 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) [2022-07-13 18:04:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2022-07-13 18:04:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-13 18:04:50,450 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:04:50,450 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] [2022-07-13 18:04:50,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 18:04:50,666 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 [2022-07-13 18:04:50,666 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:04:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:04:50,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1533046684, now seen corresponding path program 15 times [2022-07-13 18:04:50,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:04:50,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997210276] [2022-07-13 18:04:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:04:50,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:04:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:50,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:04:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:50,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:50,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:50,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:50,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:51,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:51,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 18:04:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:51,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:51,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:51,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:04:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:04:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-13 18:04:51,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:04:51,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997210276] [2022-07-13 18:04:51,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997210276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:04:51,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180479412] [2022-07-13 18:04:51,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 18:04:51,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:04:51,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:04:51,408 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) [2022-07-13 18:04:51,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 18:04:51,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-13 18:04:51,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:04:51,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-13 18:04:51,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:04:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 9 proven. 195 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2022-07-13 18:04:52,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:05:10,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180479412] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:05:10,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:05:10,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2022-07-13 18:05:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237167727] [2022-07-13 18:05:10,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:05:10,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 18:05:10,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:05:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 18:05:10,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4704, Unknown=7, NotChecked=0, Total=4970 [2022-07-13 18:05:10,709 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) [2022-07-13 18:05:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:05:11,626 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-07-13 18:05:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 18:05:11,627 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 [2022-07-13 18:05:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:05:11,627 INFO L225 Difference]: With dead ends: 92 [2022-07-13 18:05:11,628 INFO L226 Difference]: Without dead ends: 88 [2022-07-13 18:05:11,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 116 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1547 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=536, Invalid=6767, Unknown=7, NotChecked=0, Total=7310 [2022-07-13 18:05:11,629 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 18:05:11,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 635 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 18:05:11,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-13 18:05:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-07-13 18:05:11,634 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) [2022-07-13 18:05:11,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2022-07-13 18:05:11,634 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 90 [2022-07-13 18:05:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:05:11,635 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2022-07-13 18:05:11,635 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) [2022-07-13 18:05:11,635 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2022-07-13 18:05:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-13 18:05:11,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:05:11,636 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] [2022-07-13 18:05:11,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 18:05:11,843 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 [2022-07-13 18:05:11,843 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:05:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:05:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash -401646488, now seen corresponding path program 16 times [2022-07-13 18:05:11,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:05:11,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736839625] [2022-07-13 18:05:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:05:11,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:05:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:11,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:05:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:11,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:11,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 18:05:12,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-13 18:05:12,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:05:12,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736839625] [2022-07-13 18:05:12,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736839625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:05:12,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051912556] [2022-07-13 18:05:12,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 18:05:12,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:05:12,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:05:12,645 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) [2022-07-13 18:05:12,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 18:05:12,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 18:05:12,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:05:12,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 157 conjunts are in the unsatisfiable core [2022-07-13 18:05:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:05:13,895 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 9 proven. 238 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-07-13 18:05:13,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:05:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-13 18:05:18,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051912556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 18:05:18,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 18:05:18,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28, 42] total 86 [2022-07-13 18:05:18,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43871031] [2022-07-13 18:05:18,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 18:05:18,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-13 18:05:18,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:05:18,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-13 18:05:18,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=6996, Unknown=0, NotChecked=0, Total=7310 [2022-07-13 18:05:18,239 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 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) [2022-07-13 18:05:20,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:05:20,405 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2022-07-13 18:05:20,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-13 18:05:20,405 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 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 [2022-07-13 18:05:20,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:05:20,406 INFO L225 Difference]: With dead ends: 108 [2022-07-13 18:05:20,406 INFO L226 Difference]: Without dead ends: 102 [2022-07-13 18:05:20,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 154 SyntacticMatches, 14 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3144 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=921, Invalid=12189, Unknown=0, NotChecked=0, Total=13110 [2022-07-13 18:05:20,407 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2539 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 18:05:20,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 824 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2539 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 18:05:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-13 18:05:20,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2022-07-13 18:05:20,417 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) [2022-07-13 18:05:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-07-13 18:05:20,417 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 97 [2022-07-13 18:05:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:05:20,418 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-07-13 18:05:20,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 82 states have (on average 1.4024390243902438) internal successors, (115), 50 states have internal predecessors, (115), 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) [2022-07-13 18:05:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-07-13 18:05:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-13 18:05:20,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:05:20,419 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] [2022-07-13 18:05:20,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 18:05:20,631 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 [2022-07-13 18:05:20,631 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:05:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:05:20,632 INFO L85 PathProgramCache]: Analyzing trace with hash -14301802, now seen corresponding path program 17 times [2022-07-13 18:05:20,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:05:20,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930676787] [2022-07-13 18:05:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:05:20,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:05:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:20,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:05:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:20,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:20,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:20,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:20,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:20,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:20,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:21,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:21,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 18:05:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:21,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:21,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:21,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:21,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 253 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-13 18:05:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:05:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930676787] [2022-07-13 18:05:21,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930676787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:05:21,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505462126] [2022-07-13 18:05:21,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 18:05:21,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:05:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:05:21,444 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) [2022-07-13 18:05:21,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 18:05:21,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-13 18:05:21,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:05:21,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 156 conjunts are in the unsatisfiable core [2022-07-13 18:05:21,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:05:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 24 proven. 241 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-07-13 18:05:22,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 18:05:40,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505462126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:05:40,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 18:05:40,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 28] total 56 [2022-07-13 18:05:40,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361898735] [2022-07-13 18:05:40,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 18:05:40,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 18:05:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 18:05:40,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 18:05:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=5562, Unknown=7, NotChecked=0, Total=5852 [2022-07-13 18:05:40,630 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 56 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 22 states have call predecessors, (23), 5 states have call successors, (23) [2022-07-13 18:05:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 18:05:41,870 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-07-13 18:05:41,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 18:05:41,870 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 22 states have call predecessors, (23), 5 states have call successors, (23) Word has length 97 [2022-07-13 18:05:41,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 18:05:41,871 INFO L225 Difference]: With dead ends: 98 [2022-07-13 18:05:41,871 INFO L226 Difference]: Without dead ends: 94 [2022-07-13 18:05:41,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 118 SyntacticMatches, 14 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1913 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=614, Invalid=8121, Unknown=7, NotChecked=0, Total=8742 [2022-07-13 18:05:41,872 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 18:05:41,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 575 Invalid, 1450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 18:05:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-13 18:05:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2022-07-13 18:05:41,878 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) [2022-07-13 18:05:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-07-13 18:05:41,879 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 97 [2022-07-13 18:05:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 18:05:41,879 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-07-13 18:05:41,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 1.2264150943396226) internal successors, (65), 34 states have internal predecessors, (65), 5 states have call successors, (5), 1 states have call predecessors, (5), 22 states have return successors, (23), 22 states have call predecessors, (23), 5 states have call successors, (23) [2022-07-13 18:05:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-07-13 18:05:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-13 18:05:41,880 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 18:05:41,881 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] [2022-07-13 18:05:41,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-13 18:05:42,096 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 [2022-07-13 18:05:42,096 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 18:05:42,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 18:05:42,096 INFO L85 PathProgramCache]: Analyzing trace with hash 246789366, now seen corresponding path program 18 times [2022-07-13 18:05:42,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 18:05:42,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313055733] [2022-07-13 18:05:42,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 18:05:42,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 18:05:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 18:05:42,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-13 18:05:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:42,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:43,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:43,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:43,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 18:05:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 18:05:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-07-13 18:05:43,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 18:05:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313055733] [2022-07-13 18:05:43,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313055733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 18:05:43,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835964324] [2022-07-13 18:05:43,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 18:05:43,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 18:05:43,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 18:05:43,301 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) [2022-07-13 18:05:43,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 18:05:43,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-07-13 18:05:43,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 18:05:43,438 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2022-07-13 18:05:43,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 18:05:45,081 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 410 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-13 18:05:45,081 INFO L328 TraceCheckSpWp]: Computing backward predicates...