./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 791161d1 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-?-791161d [2022-07-22 17:40:43,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 17:40:43,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 17:40:43,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 17:40:43,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 17:40:43,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 17:40:43,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 17:40:43,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 17:40:43,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 17:40:43,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 17:40:43,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 17:40:43,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 17:40:43,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 17:40:43,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 17:40:43,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 17:40:43,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 17:40:43,279 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 17:40:43,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 17:40:43,282 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 17:40:43,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 17:40:43,287 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 17:40:43,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 17:40:43,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 17:40:43,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 17:40:43,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 17:40:43,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 17:40:43,294 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 17:40:43,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 17:40:43,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 17:40:43,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 17:40:43,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 17:40:43,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 17:40:43,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 17:40:43,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 17:40:43,299 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 17:40:43,299 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 17:40:43,299 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 17:40:43,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 17:40:43,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 17:40:43,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 17:40:43,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 17:40:43,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 17:40:43,303 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 17:40:43,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 17:40:43,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 17:40:43,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 17:40:43,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 17:40:43,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 17:40:43,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 17:40:43,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 17:40:43,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 17:40:43,329 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 17:40:43,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 17:40:43,330 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 17:40:43,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 17:40:43,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 17:40:43,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 17:40:43,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 17:40:43,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 17:40:43,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 17:40:43,331 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 17:40:43,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 17:40:43,332 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 17:40:43,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 17:40:43,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 17:40:43,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 17:40:43,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 17:40:43,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 17:40:43,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 17:40:43,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 17:40:43,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 17:40:43,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 17:40:43,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 17:40:43,334 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 17:40:43,334 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 17:40:43,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 17:40:43,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2022-07-22 17:40:43,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 17:40:43,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 17:40:43,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 17:40:43,533 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 17:40:43,534 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 17:40:43,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2022-07-22 17:40:43,580 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78cf2c40/dd4e6dfcf0684834986f62350879e4a4/FLAG207599530 [2022-07-22 17:40:43,917 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 17:40:43,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2022-07-22 17:40:43,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78cf2c40/dd4e6dfcf0684834986f62350879e4a4/FLAG207599530 [2022-07-22 17:40:43,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78cf2c40/dd4e6dfcf0684834986f62350879e4a4 [2022-07-22 17:40:43,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 17:40:43,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 17:40:43,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 17:40:43,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 17:40:43,939 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 17:40:43,940 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 05:40:43" (1/1) ... [2022-07-22 17:40:43,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c283835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:43, skipping insertion in model container [2022-07-22 17:40:43,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 05:40:43" (1/1) ... [2022-07-22 17:40:43,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 17:40:43,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 17:40:44,069 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] [2022-07-22 17:40:44,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 17:40:44,075 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 17:40:44,086 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] [2022-07-22 17:40:44,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 17:40:44,094 INFO L208 MainTranslator]: Completed translation [2022-07-22 17:40:44,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44 WrapperNode [2022-07-22 17:40:44,095 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 17:40:44,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 17:40:44,095 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 17:40:44,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 17:40:44,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,104 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,113 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-07-22 17:40:44,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 17:40:44,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 17:40:44,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 17:40:44,114 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 17:40:44,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,122 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 17:40:44,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 17:40:44,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 17:40:44,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 17:40:44,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (1/1) ... [2022-07-22 17:40:44,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 17:40:44,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:44,146 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) [2022-07-22 17:40:44,156 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 [2022-07-22 17:40:44,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 17:40:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-07-22 17:40:44,179 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-07-22 17:40:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 17:40:44,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 17:40:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 17:40:44,222 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 17:40:44,223 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 17:40:44,296 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 17:40:44,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 17:40:44,300 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 17:40:44,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 05:40:44 BoogieIcfgContainer [2022-07-22 17:40:44,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 17:40:44,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 17:40:44,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 17:40:44,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 17:40:44,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 05:40:43" (1/3) ... [2022-07-22 17:40:44,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc14692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 05:40:44, skipping insertion in model container [2022-07-22 17:40:44,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:44" (2/3) ... [2022-07-22 17:40:44,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc14692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 05:40:44, skipping insertion in model container [2022-07-22 17:40:44,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 05:40:44" (3/3) ... [2022-07-22 17:40:44,310 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2022-07-22 17:40:44,320 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 17:40:44,320 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 17:40:44,363 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 17:40:44,371 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@45929cbf, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4d07bc62 [2022-07-22 17:40:44,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 17:40:44,375 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) [2022-07-22 17:40:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 17:40:44,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:44,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:44,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:44,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2022-07-22 17:40:44,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:44,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136264627] [2022-07-22 17:40:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:44,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:44,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:40:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:44,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 17:40:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 17:40:44,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:44,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136264627] [2022-07-22 17:40:44,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136264627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:40:44,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:40:44,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:40:44,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721531867] [2022-07-22 17:40:44,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:40:44,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:40:44,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:40:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:40:44,763 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) [2022-07-22 17:40:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:44,858 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2022-07-22 17:40:44,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 17:40:44,860 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 [2022-07-22 17:40:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:44,866 INFO L225 Difference]: With dead ends: 44 [2022-07-22 17:40:44,866 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 17:40:44,869 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 [2022-07-22 17:40:44,871 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:44,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 17:40:44,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 17:40:44,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-22 17:40:44,904 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) [2022-07-22 17:40:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-07-22 17:40:44,905 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2022-07-22 17:40:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:44,906 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-07-22 17:40:44,906 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) [2022-07-22 17:40:44,906 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-07-22 17:40:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 17:40:44,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:44,908 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] [2022-07-22 17:40:44,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 17:40:44,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:44,910 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2022-07-22 17:40:44,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:44,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399170178] [2022-07-22 17:40:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:44,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:44,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:40:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:44,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 17:40:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:40:45,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 17:40:45,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:45,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399170178] [2022-07-22 17:40:45,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399170178] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:45,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234236142] [2022-07-22 17:40:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:45,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:45,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:45,031 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) [2022-07-22 17:40:45,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 17:40:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 17:40:45,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 17:40:45,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:45,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 17:40:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234236142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:45,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:45,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-07-22 17:40:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217767323] [2022-07-22 17:40:45,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:45,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 17:40:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:45,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 17:40:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-22 17:40:45,198 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) [2022-07-22 17:40:45,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:45,352 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2022-07-22 17:40:45,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 17:40:45,353 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 [2022-07-22 17:40:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:45,355 INFO L225 Difference]: With dead ends: 52 [2022-07-22 17:40:45,359 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 17:40:45,362 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 [2022-07-22 17:40:45,363 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 [2022-07-22 17:40:45,364 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] [2022-07-22 17:40:45,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 17:40:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-22 17:40:45,374 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) [2022-07-22 17:40:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-22 17:40:45,376 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 26 [2022-07-22 17:40:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:45,376 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-22 17:40:45,377 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) [2022-07-22 17:40:45,377 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-07-22 17:40:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 17:40:45,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:45,380 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] [2022-07-22 17:40:45,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:45,591 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 [2022-07-22 17:40:45,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:45,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:45,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 1 times [2022-07-22 17:40:45,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:45,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458752540] [2022-07-22 17:40:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:45,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:40:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:40:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 17:40:45,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:45,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458752540] [2022-07-22 17:40:45,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458752540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:40:45,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:40:45,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 17:40:45,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250583779] [2022-07-22 17:40:45,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:40:45,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 17:40:45,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:45,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 17:40:45,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 17:40:45,660 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) [2022-07-22 17:40:45,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:45,696 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-07-22 17:40:45,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 17:40:45,696 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 [2022-07-22 17:40:45,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:45,697 INFO L225 Difference]: With dead ends: 31 [2022-07-22 17:40:45,698 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 17:40:45,699 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 [2022-07-22 17:40:45,700 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 [2022-07-22 17:40:45,701 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] [2022-07-22 17:40:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 17:40:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-22 17:40:45,706 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) [2022-07-22 17:40:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-22 17:40:45,707 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 27 [2022-07-22 17:40:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:45,708 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-22 17:40:45,708 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) [2022-07-22 17:40:45,708 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-22 17:40:45,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 17:40:45,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:45,711 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] [2022-07-22 17:40:45,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 17:40:45,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:45,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 2 times [2022-07-22 17:40:45,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:45,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481671977] [2022-07-22 17:40:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:45,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:40:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:40:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 17:40:45,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:45,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481671977] [2022-07-22 17:40:45,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481671977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069710360] [2022-07-22 17:40:45,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:40:45,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:45,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:45,988 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) [2022-07-22 17:40:45,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 17:40:46,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:40:46,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 17:40:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 17:40:46,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:46,981 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 17:40:46,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069710360] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:46,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:46,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 35 [2022-07-22 17:40:46,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640495603] [2022-07-22 17:40:46,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:46,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 17:40:46,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:46,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 17:40:46,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 17:40:46,986 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) [2022-07-22 17:40:47,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:47,351 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-07-22 17:40:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 17:40:47,352 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 [2022-07-22 17:40:47,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:47,353 INFO L225 Difference]: With dead ends: 40 [2022-07-22 17:40:47,353 INFO L226 Difference]: Without dead ends: 36 [2022-07-22 17:40:47,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 17:40:47,354 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:47,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 188 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 17:40:47,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-22 17:40:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-22 17:40:47,359 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) [2022-07-22 17:40:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-07-22 17:40:47,360 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 34 [2022-07-22 17:40:47,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:47,360 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-07-22 17:40:47,360 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) [2022-07-22 17:40:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-07-22 17:40:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 17:40:47,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:47,362 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] [2022-07-22 17:40:47,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:47,575 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 [2022-07-22 17:40:47,575 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash -757286924, now seen corresponding path program 1 times [2022-07-22 17:40:47,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:47,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815779912] [2022-07-22 17:40:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:47,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:40:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:47,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:47,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:40:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:47,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:47,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 17:40:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:47,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 17:40:47,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:47,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815779912] [2022-07-22 17:40:47,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815779912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:47,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566800289] [2022-07-22 17:40:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:47,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:47,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:47,688 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) [2022-07-22 17:40:47,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 17:40:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:47,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 17:40:47,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 17:40:47,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-22 17:40:47,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566800289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:47,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:47,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-07-22 17:40:47,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062849327] [2022-07-22 17:40:47,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 17:40:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 17:40:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-07-22 17:40:47,874 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) [2022-07-22 17:40:47,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:47,934 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-07-22 17:40:47,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 17:40:47,935 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 [2022-07-22 17:40:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:47,936 INFO L225 Difference]: With dead ends: 54 [2022-07-22 17:40:47,936 INFO L226 Difference]: Without dead ends: 25 [2022-07-22 17:40:47,937 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 [2022-07-22 17:40:47,938 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 [2022-07-22 17:40:47,938 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] [2022-07-22 17:40:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-22 17:40:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-22 17:40:47,944 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) [2022-07-22 17:40:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-22 17:40:47,947 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 47 [2022-07-22 17:40:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:47,948 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-22 17:40:47,948 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) [2022-07-22 17:40:47,949 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-22 17:40:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 17:40:47,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:47,950 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] [2022-07-22 17:40:47,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:48,167 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 [2022-07-22 17:40:48,168 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:48,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:48,168 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 3 times [2022-07-22 17:40:48,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:48,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545923515] [2022-07-22 17:40:48,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:48,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:40:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-22 17:40:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 17:40:48,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545923515] [2022-07-22 17:40:48,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545923515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:48,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201172600] [2022-07-22 17:40:48,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:40:48,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:48,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:48,443 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) [2022-07-22 17:40:48,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 17:40:48,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 17:40:48,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:48,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-22 17:40:48,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 17:40:48,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 17:40:49,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201172600] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:49,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:49,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 49 [2022-07-22 17:40:49,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080859972] [2022-07-22 17:40:49,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:49,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 17:40:49,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:49,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 17:40:49,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 17:40:49,901 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) [2022-07-22 17:40:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:50,848 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-07-22 17:40:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 17:40:50,848 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 [2022-07-22 17:40:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:50,849 INFO L225 Difference]: With dead ends: 58 [2022-07-22 17:40:50,849 INFO L226 Difference]: Without dead ends: 52 [2022-07-22 17:40:50,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=469, Invalid=3821, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 17:40:50,851 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:50,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 403 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 17:40:50,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-22 17:40:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-07-22 17:40:50,856 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) [2022-07-22 17:40:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-07-22 17:40:50,857 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 41 [2022-07-22 17:40:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:50,857 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-07-22 17:40:50,857 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) [2022-07-22 17:40:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-07-22 17:40:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 17:40:50,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:50,859 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] [2022-07-22 17:40:50,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:51,065 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 [2022-07-22 17:40:51,066 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:51,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 4 times [2022-07-22 17:40:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:51,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832865977] [2022-07-22 17:40:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:40:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 17:40:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-22 17:40:51,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:51,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832865977] [2022-07-22 17:40:51,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832865977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:51,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756057644] [2022-07-22 17:40:51,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 17:40:51,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:51,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:51,465 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) [2022-07-22 17:40:51,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 17:40:51,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 17:40:51,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:51,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-22 17:40:51,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-22 17:40:51,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:55,423 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 (<= .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) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153|) (< .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))) (< .cse5 .cse6) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|) (< .cse8 (+ .cse7 |c_mult_#res|))))) (not (< |c_mult_#in~m| 0))) is different from false [2022-07-22 17:40:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 12 not checked. [2022-07-22 17:40:55,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756057644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:55,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:55,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 51 [2022-07-22 17:40:55,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800861720] [2022-07-22 17:40:55,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:55,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-22 17:40:55,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-22 17:40:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2269, Unknown=1, NotChecked=96, Total=2550 [2022-07-22 17:40:55,681 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) [2022-07-22 17:40:56,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:56,865 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-07-22 17:40:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 17:40:56,866 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 [2022-07-22 17:40:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:56,867 INFO L225 Difference]: With dead ends: 66 [2022-07-22 17:40:56,867 INFO L226 Difference]: Without dead ends: 58 [2022-07-22 17:40:56,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=437, Invalid=4258, Unknown=1, NotChecked=134, Total=4830 [2022-07-22 17:40:56,868 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:56,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 402 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1262 Invalid, 0 Unknown, 48 Unchecked, 0.6s Time] [2022-07-22 17:40:56,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-22 17:40:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-07-22 17:40:56,874 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) [2022-07-22 17:40:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-22 17:40:56,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 55 [2022-07-22 17:40:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:56,875 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-22 17:40:56,875 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) [2022-07-22 17:40:56,875 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-22 17:40:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 17:40:56,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:56,876 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] [2022-07-22 17:40:56,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:57,091 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 [2022-07-22 17:40:57,091 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:57,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:57,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1278690222, now seen corresponding path program 5 times [2022-07-22 17:40:57,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:57,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850594028] [2022-07-22 17:40:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:57,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:57,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:40:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:57,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:57,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:57,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:57,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:57,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-22 17:40:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:57,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-22 17:40:57,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:57,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850594028] [2022-07-22 17:40:57,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850594028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:57,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111084890] [2022-07-22 17:40:57,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 17:40:57,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:57,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:57,375 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) [2022-07-22 17:40:57,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 17:40:57,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 17:40:57,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-22 17:40:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 17:40:57,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 17:40:58,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111084890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:58,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:58,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 23] total 53 [2022-07-22 17:40:58,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150929335] [2022-07-22 17:40:58,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:58,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 17:40:58,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:58,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 17:40:58,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 17:40:58,920 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) [2022-07-22 17:40:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:59,716 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-22 17:40:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 17:40:59,716 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 [2022-07-22 17:40:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:59,718 INFO L225 Difference]: With dead ends: 72 [2022-07-22 17:40:59,718 INFO L226 Difference]: Without dead ends: 64 [2022-07-22 17:40:59,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=491, Invalid=4621, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 17:40:59,720 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:59,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 259 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 17:40:59,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-22 17:40:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-22 17:40:59,726 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) [2022-07-22 17:40:59,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-07-22 17:40:59,726 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 48 [2022-07-22 17:40:59,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:59,727 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-07-22 17:40:59,727 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) [2022-07-22 17:40:59,727 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-07-22 17:40:59,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 17:40:59,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:59,728 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] [2022-07-22 17:40:59,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 17:40:59,944 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 [2022-07-22 17:40:59,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:59,945 INFO L85 PathProgramCache]: Analyzing trace with hash 230391048, now seen corresponding path program 6 times [2022-07-22 17:40:59,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:59,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364803794] [2022-07-22 17:40:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:59,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:59,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:41:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 17:41:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 17:41:00,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364803794] [2022-07-22 17:41:00,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364803794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:00,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885591987] [2022-07-22 17:41:00,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 17:41:00,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:00,478 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) [2022-07-22 17:41:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 17:41:00,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-22 17:41:00,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:00,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-22 17:41:00,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 17:41:01,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:05,313 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_42_78| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129| Int) (v_mult_~n_BEFORE_CALL_42 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133| Int)) (let ((.cse2 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133| 5))) (let ((.cse1 (* |aux_div_v_mult_#in~n_BEFORE_CALL_42_78| 5)) (.cse0 (+ .cse2 |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133|)) (.cse4 (div (+ (* 2 v_mult_~n_BEFORE_CALL_42) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133| (- 10))) (- 5))) (.cse3 (div (+ (* (- 2) v_mult_~n_BEFORE_CALL_42) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133| 10) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133|)) 5))) (or (< .cse0 .cse1) (< (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129| 5) (+ .cse2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133|)) (<= (+ 5 .cse1) .cse0) (<= .cse3 |aux_div_v_mult_#in~n_BEFORE_CALL_42_78|) (< .cse4 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129|) (< .cse3 .cse4) (< |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133| .cse3) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_78_129_133|))))) (<= |c_mult_#in~m| 0) (forall ((v_mult_~n_BEFORE_CALL_42 Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_42_112| Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133| Int)) (let ((.cse6 (* 5 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143|)) (.cse5 (+ (* 5 |aux_div_v_mult_#in~n_BEFORE_CALL_42_112|) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143|)) (.cse8 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143|) (* (- 2) v_mult_~n_BEFORE_CALL_42) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143| 10)) 5)) (.cse7 (div (+ (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143|) (* 2 v_mult_~n_BEFORE_CALL_42) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143| (- 10))) (- 5)))) (or (< .cse5 (+ .cse6 |c_mult_#res|)) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_42_112| .cse7) (< .cse6 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133| 5) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143|)) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133| .cse8) (<= (+ .cse6 5 |c_mult_#res|) .cse5) (< .cse8 .cse7) (< .cse7 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143|) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_42_112_133_143|)))) (not (< |c_mult_#in~m| 0))) is different from false [2022-07-22 17:41:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 142 refuted. 0 times theorem prover too weak. 38 trivial. 16 not checked. [2022-07-22 17:41:05,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885591987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:05,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:05,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 31] total 63 [2022-07-22 17:41:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546453037] [2022-07-22 17:41:05,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:05,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 17:41:05,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 17:41:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3557, Unknown=1, NotChecked=120, Total=3906 [2022-07-22 17:41:05,505 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2022-07-22 17:41:06,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:06,987 INFO L93 Difference]: Finished difference Result 84 states and 113 transitions. [2022-07-22 17:41:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 17:41:06,988 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 69 [2022-07-22 17:41:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:06,990 INFO L225 Difference]: With dead ends: 84 [2022-07-22 17:41:06,990 INFO L226 Difference]: Without dead ends: 76 [2022-07-22 17:41:06,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 109 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=589, Invalid=6554, Unknown=1, NotChecked=166, Total=7310 [2022-07-22 17:41:06,992 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 33 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:06,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 540 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1727 Invalid, 0 Unknown, 53 Unchecked, 0.7s Time] [2022-07-22 17:41:06,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-22 17:41:07,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-07-22 17:41:07,008 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) [2022-07-22 17:41:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2022-07-22 17:41:07,009 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 69 [2022-07-22 17:41:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:07,010 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2022-07-22 17:41:07,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 39 states have internal predecessors, (85), 13 states have call successors, (13), 1 states have call predecessors, (13), 18 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2022-07-22 17:41:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2022-07-22 17:41:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 17:41:07,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:07,011 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] [2022-07-22 17:41:07,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:07,227 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 [2022-07-22 17:41:07,227 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:07,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:07,228 INFO L85 PathProgramCache]: Analyzing trace with hash -529248084, now seen corresponding path program 7 times [2022-07-22 17:41:07,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:07,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012222344] [2022-07-22 17:41:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:07,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:41:07,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 17:41:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:07,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 134 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 17:41:07,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:07,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012222344] [2022-07-22 17:41:07,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012222344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:07,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026138430] [2022-07-22 17:41:07,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 17:41:07,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:07,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:07,639 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) [2022-07-22 17:41:07,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 17:41:07,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:07,701 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-22 17:41:07,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 4 proven. 132 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-22 17:41:08,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 17 proven. 197 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-22 17:41:09,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026138430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:09,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:09,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 24] total 48 [2022-07-22 17:41:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492575301] [2022-07-22 17:41:09,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:09,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 17:41:09,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:09,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 17:41:09,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2080, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 17:41:09,980 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand has 48 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 30 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-22 17:41:10,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:10,755 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-07-22 17:41:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 17:41:10,755 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 30 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) Word has length 76 [2022-07-22 17:41:10,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:10,756 INFO L225 Difference]: With dead ends: 84 [2022-07-22 17:41:10,756 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 17:41:10,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 139 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=436, Invalid=4120, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 17:41:10,758 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:10,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 181 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 17:41:10,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 17:41:10,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2022-07-22 17:41:10,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 7 states have call successors, (7), 3 states have call predecessors, (7), 12 states have return successors, (25), 15 states have call predecessors, (25), 7 states have call successors, (25) [2022-07-22 17:41:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-07-22 17:41:10,765 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 76 [2022-07-22 17:41:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:10,765 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-07-22 17:41:10,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 30 states have internal predecessors, (64), 11 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-22 17:41:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-07-22 17:41:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 17:41:10,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:10,766 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] [2022-07-22 17:41:10,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:10,975 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 [2022-07-22 17:41:10,976 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:10,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:10,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 8 times [2022-07-22 17:41:10,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:10,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522844035] [2022-07-22 17:41:10,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:10,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:41:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 17:41:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-22 17:41:11,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:11,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522844035] [2022-07-22 17:41:11,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522844035] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:11,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544440205] [2022-07-22 17:41:11,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:41:11,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:11,554 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) [2022-07-22 17:41:11,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 17:41:11,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:41:11,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:11,608 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-22 17:41:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 17:41:12,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:16,834 WARN L833 $PredicateComparison]: unable to prove that (and (<= |c_mult_#in~m| 0) (forall ((|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109| Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_74_90| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163| Int) (v_mult_~n_BEFORE_CALL_74 Int)) (let ((.cse1 (div (+ (* (- 2) |c_mult_#res|) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163| 12) (* (- 2) v_mult_~n_BEFORE_CALL_74)) 6)) (.cse0 (div (+ (* 2 |c_mult_#res|) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163| (- 12)) (* 2 v_mult_~n_BEFORE_CALL_74)) (- 6))) (.cse2 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163| 6))) (or (>= |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163| 6) (< .cse0 |aux_div_v_mult_#in~n_BEFORE_CALL_74_90|) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109| .cse1) (< (+ (* |aux_div_v_mult_#in~n_BEFORE_CALL_74_90| 6) |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163|) .cse2) (< .cse1 .cse0) (<= |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163| .cse0) (< .cse2 (+ (* 6 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109|) |c_mult_#res| |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163|)) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_163|)))) (not (< |c_mult_#in~m| 0)) (forall ((|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_74_90| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135| Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135| Int) (v_mult_~n_BEFORE_CALL_74 Int)) (let ((.cse4 (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135| 6) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135|)) (.cse5 (div (+ (* (- 2) |c_mult_#res|) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135| 12) (* (- 2) v_mult_~n_BEFORE_CALL_74)) 6)) (.cse3 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135|) (* 2 |c_mult_#res|) (* 2 v_mult_~n_BEFORE_CALL_74) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135| (- 12))) (- 6)))) (or (< .cse3 |aux_div_v_mult_#in~n_BEFORE_CALL_74_90|) (< .cse4 (+ (* 6 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109|) |c_mult_#res|)) (<= .cse5 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135|) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109| .cse5) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135|) (>= |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_74_90_109_135| 6) (< (+ (* |aux_div_v_mult_#in~n_BEFORE_CALL_74_90| 6) |c_mult_#res|) .cse4) (< .cse5 .cse3))))) is different from false [2022-07-22 17:41:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 187 refuted. 0 times theorem prover too weak. 47 trivial. 18 not checked. [2022-07-22 17:41:17,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544440205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:17,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:17,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 34] total 69 [2022-07-22 17:41:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693779783] [2022-07-22 17:41:17,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:17,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-22 17:41:17,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:17,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-22 17:41:17,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=4309, Unknown=1, NotChecked=132, Total=4692 [2022-07-22 17:41:17,036 INFO L87 Difference]: Start difference. First operand 62 states and 77 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) [2022-07-22 17:41:18,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:18,593 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2022-07-22 17:41:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 17:41:18,593 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 [2022-07-22 17:41:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:18,594 INFO L225 Difference]: With dead ends: 88 [2022-07-22 17:41:18,594 INFO L226 Difference]: Without dead ends: 82 [2022-07-22 17:41:18,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 120 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=653, Invalid=7540, Unknown=1, NotChecked=178, Total=8372 [2022-07-22 17:41:18,596 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:18,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 624 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1672 Invalid, 0 Unknown, 45 Unchecked, 0.8s Time] [2022-07-22 17:41:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-22 17:41:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2022-07-22 17:41:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 14 states have return successors, (28), 17 states have call predecessors, (28), 7 states have call successors, (28) [2022-07-22 17:41:18,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-07-22 17:41:18,613 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 76 [2022-07-22 17:41:18,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:18,614 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-07-22 17:41:18,614 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) [2022-07-22 17:41:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-07-22 17:41:18,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 17:41:18,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:18,615 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] [2022-07-22 17:41:18,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:18,816 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 [2022-07-22 17:41:18,816 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:18,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 9 times [2022-07-22 17:41:18,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:18,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777764651] [2022-07-22 17:41:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:18,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:18,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:18,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:41:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:18,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 17:41:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:19,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:19,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:19,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:19,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:19,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:19,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-22 17:41:19,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:19,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777764651] [2022-07-22 17:41:19,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777764651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:19,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753994021] [2022-07-22 17:41:19,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:41:19,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:19,457 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) [2022-07-22 17:41:19,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 17:41:19,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-22 17:41:19,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:19,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-22 17:41:19,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 20 proven. 174 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-22 17:41:20,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:25,479 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_92_78| Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133| Int) (v_mult_~n_BEFORE_CALL_92 Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133| Int)) (let ((.cse4 (* 7 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133|))) (let ((.cse1 (* |aux_div_v_mult_#in~n_BEFORE_CALL_92_78| 7)) (.cse0 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133| .cse4 |c_mult_#res|)) (.cse3 (div (+ (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133|) (* 14 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133|) (* (- 2) v_mult_~n_BEFORE_CALL_92)) 7)) (.cse2 (div (+ (* (- 14) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133|) (* 2 v_mult_~n_BEFORE_CALL_92) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133|)) (- 7)))) (or (< .cse0 .cse1) (< .cse2 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129|) (<= .cse3 |aux_div_v_mult_#in~n_BEFORE_CALL_92_78|) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133|) (< |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133| .cse3) (< (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129| 7) (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_78_129_133| .cse4)) (<= (+ 7 .cse1) .cse0) (< .cse3 .cse2))))) (<= |c_mult_#in~m| 0) (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143| Int) (v_mult_~n_BEFORE_CALL_92 Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_92_112| Int)) (let ((.cse7 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143|) (* 14 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143|) (* (- 2) v_mult_~n_BEFORE_CALL_92)) 7)) (.cse8 (div (+ (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143| 2) (* (- 14) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143|) (* 2 v_mult_~n_BEFORE_CALL_92)) (- 7))) (.cse6 (* 7 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143|)) (.cse5 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143| (* 7 |aux_div_v_mult_#in~n_BEFORE_CALL_92_112|)))) (or (< .cse5 (+ .cse6 |c_mult_#res|)) (< .cse7 .cse8) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133| .cse7) (< .cse8 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143|) (< .cse6 (+ (* 7 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133|) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143|)) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_92_112| .cse8) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_92_112_133_143|) (<= (+ 7 .cse6 |c_mult_#res|) .cse5))))) is different from false [2022-07-22 17:41:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 31 proven. 241 refuted. 0 times theorem prover too weak. 55 trivial. 20 not checked. [2022-07-22 17:41:25,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753994021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:25,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:25,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 40] total 80 [2022-07-22 17:41:25,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079943426] [2022-07-22 17:41:25,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:25,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-22 17:41:25,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:25,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-22 17:41:25,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=5856, Unknown=1, NotChecked=154, Total=6320 [2022-07-22 17:41:25,824 INFO L87 Difference]: Start difference. First operand 68 states and 84 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) [2022-07-22 17:41:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:27,490 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2022-07-22 17:41:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 17:41:27,490 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 [2022-07-22 17:41:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:27,491 INFO L225 Difference]: With dead ends: 94 [2022-07-22 17:41:27,491 INFO L226 Difference]: Without dead ends: 88 [2022-07-22 17:41:27,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 125 SyntacticMatches, 13 SemanticMatches, 103 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=849, Invalid=9866, Unknown=1, NotChecked=204, Total=10920 [2022-07-22 17:41:27,493 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 2047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:27,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 641 Invalid, 2047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1861 Invalid, 0 Unknown, 57 Unchecked, 0.8s Time] [2022-07-22 17:41:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-22 17:41:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2022-07-22 17:41:27,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 7 states have call successors, (7), 3 states have call predecessors, (7), 16 states have return successors, (31), 19 states have call predecessors, (31), 7 states have call successors, (31) [2022-07-22 17:41:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-07-22 17:41:27,509 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 83 [2022-07-22 17:41:27,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:27,510 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-07-22 17:41:27,510 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) [2022-07-22 17:41:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-07-22 17:41:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 17:41:27,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:27,511 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] [2022-07-22 17:41:27,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:27,727 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 [2022-07-22 17:41:27,728 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1145702838, now seen corresponding path program 10 times [2022-07-22 17:41:27,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107588836] [2022-07-22 17:41:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:41:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:28,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:28,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:41:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:28,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 22 proven. 119 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 17:41:28,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:28,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107588836] [2022-07-22 17:41:28,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107588836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:28,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919030590] [2022-07-22 17:41:28,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 17:41:28,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:28,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:28,226 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) [2022-07-22 17:41:28,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 17:41:28,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 17:41:28,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:28,295 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-22 17:41:28,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 111 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-22 17:41:28,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:45,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919030590] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:45,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 17:41:45,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 42 [2022-07-22 17:41:45,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526362859] [2022-07-22 17:41:45,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:45,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 17:41:45,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 17:41:45,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=3203, Unknown=8, NotChecked=0, Total=3422 [2022-07-22 17:41:45,598 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-22 17:41:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:46,304 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2022-07-22 17:41:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 17:41:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) Word has length 69 [2022-07-22 17:41:46,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:46,305 INFO L225 Difference]: With dead ends: 84 [2022-07-22 17:41:46,305 INFO L226 Difference]: Without dead ends: 80 [2022-07-22 17:41:46,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 85 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=422, Invalid=4682, Unknown=8, NotChecked=0, Total=5112 [2022-07-22 17:41:46,306 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:46,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 307 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 17:41:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-22 17:41:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2022-07-22 17:41:46,311 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, (32), 20 states have call predecessors, (32), 8 states have call successors, (32) [2022-07-22 17:41:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2022-07-22 17:41:46,312 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 69 [2022-07-22 17:41:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:46,312 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2022-07-22 17:41:46,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 26 states have internal predecessors, (49), 5 states have call successors, (5), 1 states have call predecessors, (5), 15 states have return successors, (16), 16 states have call predecessors, (16), 5 states have call successors, (16) [2022-07-22 17:41:46,312 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2022-07-22 17:41:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-22 17:41:46,313 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:46,313 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] [2022-07-22 17:41:46,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:46,528 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 [2022-07-22 17:41:46,528 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:46,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:46,529 INFO L85 PathProgramCache]: Analyzing trace with hash -43543002, now seen corresponding path program 11 times [2022-07-22 17:41:46,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:46,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855642163] [2022-07-22 17:41:46,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:46,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:41:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:46,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:46,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:46,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:46,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:46,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:46,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:46,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:41:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:46,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:47,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:47,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:47,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:47,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:47,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:47,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:47,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-22 17:41:47,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:47,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855642163] [2022-07-22 17:41:47,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855642163] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:47,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955577797] [2022-07-22 17:41:47,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 17:41:47,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:47,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:47,499 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) [2022-07-22 17:41:47,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 17:41:47,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-22 17:41:47,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:47,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2022-07-22 17:41:47,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 8 proven. 315 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2022-07-22 17:41:48,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:10,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955577797] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:10,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 17:42:10,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 26] total 60 [2022-07-22 17:42:10,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68008095] [2022-07-22 17:42:10,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:10,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-22 17:42:10,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:10,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-22 17:42:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=7494, Unknown=8, NotChecked=0, Total=7832 [2022-07-22 17:42:10,484 INFO L87 Difference]: Start difference. First operand 76 states and 94 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) [2022-07-22 17:42:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:42:11,917 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2022-07-22 17:42:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 17:42:11,918 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 [2022-07-22 17:42:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:42:11,918 INFO L225 Difference]: With dead ends: 90 [2022-07-22 17:42:11,918 INFO L226 Difference]: Without dead ends: 86 [2022-07-22 17:42:11,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 156 SyntacticMatches, 14 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=757, Invalid=10791, Unknown=8, NotChecked=0, Total=11556 [2022-07-22 17:42:11,920 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 17:42:11,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 611 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1542 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 17:42:11,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-22 17:42:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2022-07-22 17:42:11,926 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, (37), 21 states have call predecessors, (37), 8 states have call successors, (37) [2022-07-22 17:42:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2022-07-22 17:42:11,926 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 111 [2022-07-22 17:42:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:42:11,927 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2022-07-22 17:42:11,927 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) [2022-07-22 17:42:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2022-07-22 17:42:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 17:42:11,928 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:42:11,928 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] [2022-07-22 17:42:11,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 17:42:12,135 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 [2022-07-22 17:42:12,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:12,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:12,136 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 12 times [2022-07-22 17:42:12,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:12,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324877809] [2022-07-22 17:42:12,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:12,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:42:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 17:42:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-22 17:42:12,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:12,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324877809] [2022-07-22 17:42:12,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324877809] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:12,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632856831] [2022-07-22 17:42:12,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 17:42:12,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:12,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:12,854 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) [2022-07-22 17:42:12,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 17:42:12,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-22 17:42:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:42:12,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-22 17:42:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 17 proven. 193 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-22 17:42:13,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-22 17:42:17,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632856831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:42:17,385 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:42:17,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 39] total 80 [2022-07-22 17:42:17,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025249241] [2022-07-22 17:42:17,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:17,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-22 17:42:17,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:17,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-22 17:42:17,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6028, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 17:42:17,387 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2022-07-22 17:42:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:42:19,251 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2022-07-22 17:42:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 17:42:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) Word has length 90 [2022-07-22 17:42:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:42:19,252 INFO L225 Difference]: With dead ends: 102 [2022-07-22 17:42:19,252 INFO L226 Difference]: Without dead ends: 96 [2022-07-22 17:42:19,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 139 SyntacticMatches, 17 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2788 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=827, Invalid=10515, Unknown=0, NotChecked=0, Total=11342 [2022-07-22 17:42:19,254 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:42:19,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 881 Invalid, 2578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 17:42:19,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-22 17:42:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2022-07-22 17:42:19,259 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, (35), 22 states have call predecessors, (35), 8 states have call successors, (35) [2022-07-22 17:42:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-07-22 17:42:19,259 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 90 [2022-07-22 17:42:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:42:19,260 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-07-22 17:42:19,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 47 states have internal predecessors, (110), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2022-07-22 17:42:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-07-22 17:42:19,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 17:42:19,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:42:19,261 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] [2022-07-22 17:42:19,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 17:42:19,475 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 [2022-07-22 17:42:19,475 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:19,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:19,476 INFO L85 PathProgramCache]: Analyzing trace with hash 838350668, now seen corresponding path program 13 times [2022-07-22 17:42:19,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:19,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885093793] [2022-07-22 17:42:19,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:19,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:42:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:19,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-22 17:42:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:19,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:20,023 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 26 proven. 148 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-22 17:42:20,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:20,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885093793] [2022-07-22 17:42:20,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885093793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:20,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017903534] [2022-07-22 17:42:20,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 17:42:20,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:20,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:20,025 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) [2022-07-22 17:42:20,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 17:42:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:20,106 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-22 17:42:20,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-22 17:42:20,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:23,021 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 8 proven. 212 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-22 17:42:23,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017903534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:42:23,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:42:23,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 27] total 63 [2022-07-22 17:42:23,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989102725] [2022-07-22 17:42:23,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:23,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 17:42:23,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:23,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 17:42:23,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3677, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 17:42:23,023 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 63 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 38 states have internal predecessors, (82), 12 states have call successors, (12), 1 states have call predecessors, (12), 18 states have return successors, (26), 25 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-22 17:42:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:42:24,344 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2022-07-22 17:42:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 17:42:24,344 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 38 states have internal predecessors, (82), 12 states have call successors, (12), 1 states have call predecessors, (12), 18 states have return successors, (26), 25 states have call predecessors, (26), 12 states have call successors, (26) Word has length 76 [2022-07-22 17:42:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:42:24,345 INFO L225 Difference]: With dead ends: 98 [2022-07-22 17:42:24,345 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 17:42:24,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 124 SyntacticMatches, 13 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=591, Invalid=6549, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 17:42:24,346 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 76 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 17:42:24,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 536 Invalid, 1782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 17:42:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 17:42:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-07-22 17:42:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 7 states have call successors, (7), 3 states have call predecessors, (7), 18 states have return successors, (33), 21 states have call predecessors, (33), 7 states have call successors, (33) [2022-07-22 17:42:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 97 transitions. [2022-07-22 17:42:24,352 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 97 transitions. Word has length 76 [2022-07-22 17:42:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:42:24,352 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 97 transitions. [2022-07-22 17:42:24,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 59 states have (on average 1.3898305084745763) internal successors, (82), 38 states have internal predecessors, (82), 12 states have call successors, (12), 1 states have call predecessors, (12), 18 states have return successors, (26), 25 states have call predecessors, (26), 12 states have call successors, (26) [2022-07-22 17:42:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 97 transitions. [2022-07-22 17:42:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-22 17:42:24,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:42:24,354 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:42:24,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-22 17:42:24,567 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 [2022-07-22 17:42:24,567 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash 960528734, now seen corresponding path program 14 times [2022-07-22 17:42:24,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161008468] [2022-07-22 17:42:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:24,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:42:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:24,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:24,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:24,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:24,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:24,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:24,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:24,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:42:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:24,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-22 17:42:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161008468] [2022-07-22 17:42:25,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161008468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455800322] [2022-07-22 17:42:25,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:42:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:25,629 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) [2022-07-22 17:42:25,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 17:42:25,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:42:25,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:42:25,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 193 conjunts are in the unsatisfiable core [2022-07-22 17:42:25,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2022-07-22 17:42:27,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:50,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455800322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:50,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 17:42:50,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 28] total 64 [2022-07-22 17:42:50,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707421940] [2022-07-22 17:42:50,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:50,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-22 17:42:50,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:50,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-22 17:42:50,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=8569, Unknown=9, NotChecked=0, Total=8930 [2022-07-22 17:42:50,677 INFO L87 Difference]: Start difference. First operand 80 states and 97 transitions. Second operand has 64 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 37 states have internal predecessors, (71), 5 states have call successors, (5), 1 states have call predecessors, (5), 26 states have return successors, (27), 27 states have call predecessors, (27), 5 states have call successors, (27) [2022-07-22 17:42:52,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:42:52,299 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-07-22 17:42:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 17:42:52,300 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 37 states have internal predecessors, (71), 5 states have call successors, (5), 1 states have call predecessors, (5), 26 states have return successors, (27), 27 states have call predecessors, (27), 5 states have call successors, (27) Word has length 118 [2022-07-22 17:42:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:42:52,300 INFO L225 Difference]: With dead ends: 96 [2022-07-22 17:42:52,300 INFO L226 Difference]: Without dead ends: 92 [2022-07-22 17:42:52,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 168 SyntacticMatches, 14 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2914 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=845, Invalid=12486, Unknown=9, NotChecked=0, Total=13340 [2022-07-22 17:42:52,302 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 17:42:52,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 894 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 17:42:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-22 17:42:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 85. [2022-07-22 17:42:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 8 states have call successors, (8), 3 states have call predecessors, (8), 19 states have return successors, (39), 23 states have call predecessors, (39), 8 states have call successors, (39) [2022-07-22 17:42:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 107 transitions. [2022-07-22 17:42:52,308 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 107 transitions. Word has length 118 [2022-07-22 17:42:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:42:52,308 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 107 transitions. [2022-07-22 17:42:52,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 37 states have internal predecessors, (71), 5 states have call successors, (5), 1 states have call predecessors, (5), 26 states have return successors, (27), 27 states have call predecessors, (27), 5 states have call successors, (27) [2022-07-22 17:42:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 107 transitions. [2022-07-22 17:42:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-22 17:42:52,309 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:42:52,309 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] [2022-07-22 17:42:52,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 17:42:52,523 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 [2022-07-22 17:42:52,523 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:52,524 INFO L85 PathProgramCache]: Analyzing trace with hash -401646488, now seen corresponding path program 15 times [2022-07-22 17:42:52,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:52,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922774795] [2022-07-22 17:42:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:52,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:42:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 17:42:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:52,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:52,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:53,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:53,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:53,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:53,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-22 17:42:53,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:53,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922774795] [2022-07-22 17:42:53,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922774795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:53,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679322382] [2022-07-22 17:42:53,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:42:53,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:53,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:53,294 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) [2022-07-22 17:42:53,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 17:42:53,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-22 17:42:53,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:42:53,402 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 156 conjunts are in the unsatisfiable core [2022-07-22 17:42:53,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 24 proven. 247 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-22 17:42:54,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 384 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-22 17:42:58,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679322382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:42:58,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:42:58,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 45] total 89 [2022-07-22 17:42:58,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958880962] [2022-07-22 17:42:58,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:58,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-22 17:42:58,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-22 17:42:58,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=7497, Unknown=0, NotChecked=0, Total=7832 [2022-07-22 17:42:58,670 INFO L87 Difference]: Start difference. First operand 85 states and 107 transitions. Second operand has 89 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 53 states have internal predecessors, (121), 17 states have call successors, (17), 1 states have call predecessors, (17), 26 states have return successors, (38), 36 states have call predecessors, (38), 17 states have call successors, (38) [2022-07-22 17:43:00,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:43:00,669 INFO L93 Difference]: Finished difference Result 104 states and 131 transitions. [2022-07-22 17:43:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 17:43:00,674 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 53 states have internal predecessors, (121), 17 states have call successors, (17), 1 states have call predecessors, (17), 26 states have return successors, (38), 36 states have call predecessors, (38), 17 states have call successors, (38) Word has length 97 [2022-07-22 17:43:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:43:00,675 INFO L225 Difference]: With dead ends: 104 [2022-07-22 17:43:00,675 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 17:43:00,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 147 SyntacticMatches, 18 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3268 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=983, Invalid=12589, Unknown=0, NotChecked=0, Total=13572 [2022-07-22 17:43:00,676 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 2477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:43:00,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 752 Invalid, 2477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 17:43:00,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 17:43:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2022-07-22 17:43:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 7 states have call successors, (7), 3 states have call predecessors, (7), 20 states have return successors, (36), 23 states have call predecessors, (36), 7 states have call successors, (36) [2022-07-22 17:43:00,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-07-22 17:43:00,683 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 97 [2022-07-22 17:43:00,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:43:00,683 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-07-22 17:43:00,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 53 states have internal predecessors, (121), 17 states have call successors, (17), 1 states have call predecessors, (17), 26 states have return successors, (38), 36 states have call predecessors, (38), 17 states have call successors, (38) [2022-07-22 17:43:00,683 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-07-22 17:43:00,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-22 17:43:00,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:43:00,684 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] [2022-07-22 17:43:00,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 17:43:00,899 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 [2022-07-22 17:43:00,899 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:43:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:43:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash 246789366, now seen corresponding path program 16 times [2022-07-22 17:43:00,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:43:00,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088474996] [2022-07-22 17:43:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:43:00,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:43:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:00,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:43:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:00,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:43:01,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:01,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:02,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-07-22 17:43:02,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:43:02,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088474996] [2022-07-22 17:43:02,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088474996] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:43:02,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153523604] [2022-07-22 17:43:02,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 17:43:02,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:43:02,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:43:02,057 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) [2022-07-22 17:43:02,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 17:43:02,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 17:43:02,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:43:02,182 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 205 conjunts are in the unsatisfiable core [2022-07-22 17:43:02,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:43:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 410 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-07-22 17:43:03,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:43:25,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153523604] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:43:25,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 17:43:25,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 30] total 68 [2022-07-22 17:43:25,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430245558] [2022-07-22 17:43:25,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 17:43:25,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 17:43:25,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:43:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 17:43:25,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=9717, Unknown=9, NotChecked=0, Total=10100 [2022-07-22 17:43:25,346 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 68 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 39 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) [2022-07-22 17:43:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:43:27,224 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2022-07-22 17:43:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 17:43:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 39 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) Word has length 125 [2022-07-22 17:43:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:43:27,225 INFO L225 Difference]: With dead ends: 102 [2022-07-22 17:43:27,225 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 17:43:27,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 175 SyntacticMatches, 19 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3434 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=937, Invalid=14306, Unknown=9, NotChecked=0, Total=15252 [2022-07-22 17:43:27,226 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 2184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 17:43:27,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1000 Invalid, 2184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 17:43:27,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 17:43:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2022-07-22 17:43:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 21 states have return successors, (42), 25 states have call predecessors, (42), 8 states have call successors, (42) [2022-07-22 17:43:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 114 transitions. [2022-07-22 17:43:27,232 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 114 transitions. Word has length 125 [2022-07-22 17:43:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:43:27,233 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 114 transitions. [2022-07-22 17:43:27,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 39 states have internal predecessors, (75), 5 states have call successors, (5), 1 states have call predecessors, (5), 28 states have return successors, (29), 29 states have call predecessors, (29), 5 states have call successors, (29) [2022-07-22 17:43:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 114 transitions. [2022-07-22 17:43:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 17:43:27,234 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:43:27,234 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:43:27,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 17:43:27,434 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 [2022-07-22 17:43:27,434 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:43:27,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:43:27,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1817590444, now seen corresponding path program 17 times [2022-07-22 17:43:27,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:43:27,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86063563] [2022-07-22 17:43:27,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:43:27,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:43:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:43:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 17:43:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:27,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:28,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:28,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:28,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:28,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:28,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-07-22 17:43:28,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:43:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86063563] [2022-07-22 17:43:28,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86063563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:43:28,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080873851] [2022-07-22 17:43:28,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 17:43:28,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:43:28,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:43:28,269 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) [2022-07-22 17:43:28,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 17:43:28,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-22 17:43:28,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:43:28,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 169 conjunts are in the unsatisfiable core [2022-07-22 17:43:28,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:43:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 21 proven. 268 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-07-22 17:43:29,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:43:36,064 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_260_93| Int) (v_mult_~n_BEFORE_CALL_260 Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133| Int)) (let ((.cse0 (* 10 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133|)) (.cse2 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159|) (* (- 20) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159|) (* v_mult_~n_BEFORE_CALL_260 2)) (- 10))) (.cse3 (div (+ (* v_mult_~n_BEFORE_CALL_260 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159| 20)) 10)) (.cse1 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159| 10))) (or (< .cse0 (+ .cse1 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159| |c_mult_#res|)) (<= (+ .cse1 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159| 10 |c_mult_#res|) .cse0) (<= |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133| .cse2) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159|) (< .cse2 |aux_div_v_mult_#in~n_BEFORE_CALL_260_93|) (< .cse3 .cse2) (< |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159| .cse3) (< (* |aux_div_v_mult_#in~n_BEFORE_CALL_260_93| 10) (+ .cse1 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_133_159|))))) (= |c_mult_#in~m| 0) (forall ((|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_260_93| Int) (v_mult_~n_BEFORE_CALL_260 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125| Int)) (let ((.cse8 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149| 10))) (let ((.cse4 (div (+ (* (- 20) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149|) (* v_mult_~n_BEFORE_CALL_260 2) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149|)) (- 10))) (.cse7 (div (+ (* v_mult_~n_BEFORE_CALL_260 (- 2)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149| 2) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149| 20)) 10)) (.cse6 (* 10 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125|)) (.cse5 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149| .cse8 |c_mult_#res|))) (or (< .cse4 |aux_div_v_mult_#in~n_BEFORE_CALL_260_93|) (< .cse5 .cse6) (< |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149| .cse7) (< .cse7 .cse4) (<= .cse7 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125|) (> 0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149|) (< (* |aux_div_v_mult_#in~n_BEFORE_CALL_260_93| 10) (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_260_93_125_149| .cse8)) (<= (+ .cse6 10) .cse5)))))) is different from false [2022-07-22 17:43:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 42 proven. 427 refuted. 0 times theorem prover too weak. 92 trivial. 26 not checked. [2022-07-22 17:43:36,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080873851] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:43:36,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:43:36,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30, 46] total 93 [2022-07-22 17:43:36,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59911202] [2022-07-22 17:43:36,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:43:36,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-22 17:43:36,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:43:36,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-22 17:43:36,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=8037, Unknown=1, NotChecked=180, Total=8556 [2022-07-22 17:43:36,261 INFO L87 Difference]: Start difference. First operand 91 states and 114 transitions. Second operand has 93 states, 89 states have (on average 1.4269662921348314) internal successors, (127), 54 states have internal predecessors, (127), 18 states have call successors, (18), 1 states have call predecessors, (18), 28 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2022-07-22 17:43:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:43:38,539 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2022-07-22 17:43:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 17:43:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 89 states have (on average 1.4269662921348314) internal successors, (127), 54 states have internal predecessors, (127), 18 states have call successors, (18), 1 states have call predecessors, (18), 28 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) Word has length 104 [2022-07-22 17:43:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:43:38,540 INFO L225 Difference]: With dead ends: 110 [2022-07-22 17:43:38,540 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 17:43:38,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 162 SyntacticMatches, 17 SemanticMatches, 121 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1017, Invalid=13748, Unknown=1, NotChecked=240, Total=15006 [2022-07-22 17:43:38,541 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 76 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 2959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 17:43:38,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 884 Invalid, 2959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2754 Invalid, 0 Unknown, 65 Unchecked, 1.2s Time] [2022-07-22 17:43:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 17:43:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2022-07-22 17:43:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 7 states have call successors, (7), 3 states have call predecessors, (7), 22 states have return successors, (39), 25 states have call predecessors, (39), 7 states have call successors, (39) [2022-07-22 17:43:38,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2022-07-22 17:43:38,547 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 104 [2022-07-22 17:43:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:43:38,548 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2022-07-22 17:43:38,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 89 states have (on average 1.4269662921348314) internal successors, (127), 54 states have internal predecessors, (127), 18 states have call successors, (18), 1 states have call predecessors, (18), 28 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2022-07-22 17:43:38,548 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2022-07-22 17:43:38,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-22 17:43:38,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:43:38,549 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] [2022-07-22 17:43:38,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 17:43:38,751 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 [2022-07-22 17:43:38,751 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:43:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:43:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash 200427544, now seen corresponding path program 18 times [2022-07-22 17:43:38,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:43:38,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662114903] [2022-07-22 17:43:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:43:38,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:43:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:38,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:43:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:38,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:38,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:38,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 17:43:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:38,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-22 17:43:39,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:43:39,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662114903] [2022-07-22 17:43:39,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662114903] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:43:39,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862051486] [2022-07-22 17:43:39,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 17:43:39,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:43:39,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:43:39,748 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) [2022-07-22 17:43:39,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 17:43:39,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-22 17:43:39,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:43:39,902 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2022-07-22 17:43:39,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:43:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 23 proven. 310 refuted. 0 times theorem prover too weak. 348 trivial. 0 not checked. [2022-07-22 17:43:41,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:44:38,911 WARN L233 SmtUtils]: Spent 6.79s on a formula simplification. DAG size of input: 55 DAG size of output: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 17:44:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 47 proven. 528 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-22 17:44:39,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862051486] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:44:39,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:44:39,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 49] total 99 [2022-07-22 17:44:39,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973839616] [2022-07-22 17:44:39,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:44:39,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-22 17:44:39,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:44:39,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-22 17:44:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=9313, Unknown=26, NotChecked=0, Total=9702 [2022-07-22 17:44:39,065 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand has 99 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 57 states have internal predecessors, (135), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2022-07-22 17:44:41,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:44:41,389 INFO L93 Difference]: Finished difference Result 114 states and 142 transitions. [2022-07-22 17:44:41,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 17:44:41,390 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 57 states have internal predecessors, (135), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) Word has length 111 [2022-07-22 17:44:41,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:44:41,391 INFO L225 Difference]: With dead ends: 114 [2022-07-22 17:44:41,391 INFO L226 Difference]: Without dead ends: 108 [2022-07-22 17:44:41,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 172 SyntacticMatches, 19 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4161 ImplicationChecksByTransitivity, 57.6s TimeCoverageRelationStatistics Valid=1123, Invalid=15881, Unknown=26, NotChecked=0, Total=17030 [2022-07-22 17:44:41,392 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2798 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 17:44:41,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 908 Invalid, 2926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2798 Invalid, 0 Unknown, 32 Unchecked, 1.2s Time] [2022-07-22 17:44:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-22 17:44:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2022-07-22 17:44:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 7 states have call successors, (7), 3 states have call predecessors, (7), 24 states have return successors, (42), 27 states have call predecessors, (42), 7 states have call successors, (42) [2022-07-22 17:44:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2022-07-22 17:44:41,399 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 111 [2022-07-22 17:44:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:44:41,399 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2022-07-22 17:44:41,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 57 states have internal predecessors, (135), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2022-07-22 17:44:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2022-07-22 17:44:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-22 17:44:41,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:44:41,400 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:44:41,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 17:44:41,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:41,618 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:44:41,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:44:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash -306164794, now seen corresponding path program 19 times [2022-07-22 17:44:41,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:44:41,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208374951] [2022-07-22 17:44:41,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:44:41,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:44:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:41,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 17:44:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:41,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:41,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:41,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:41,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 17:44:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:42,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 64 proven. 542 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2022-07-22 17:44:43,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:44:43,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208374951] [2022-07-22 17:44:43,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208374951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:44:43,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440170028] [2022-07-22 17:44:43,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 17:44:43,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:43,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:44:43,008 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:44:43,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 17:44:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:43,158 WARN L261 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 229 conjunts are in the unsatisfiable core [2022-07-22 17:44:43,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:44:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 12 proven. 517 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2022-07-22 17:44:45,064 INFO L328 TraceCheckSpWp]: Computing backward predicates...