./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/num_conversion_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/bitvector/num_conversion_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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:38:49,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:38:49,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:38:49,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:38:49,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:38:49,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:38:49,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:38:49,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:38:49,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:38:49,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:38:49,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:38:49,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:38:49,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:38:49,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:38:49,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:38:49,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:38:49,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:38:49,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:38:49,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:38:49,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:38:49,342 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:38:49,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:38:49,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:38:49,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:38:49,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:38:49,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:38:49,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:38:49,349 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:38:49,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:38:49,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:38:49,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:38:49,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:38:49,353 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:38:49,354 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:38:49,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:38:49,355 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:38:49,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:38:49,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:38:49,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:38:49,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:38:49,357 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:38:49,358 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 02:38:49,375 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:38:49,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:38:49,376 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:38:49,376 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:38:49,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:38:49,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:38:49,377 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:38:49,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:38:49,378 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:38:49,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:38:49,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:38:49,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 02:38:49,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:38:49,379 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:38:49,379 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:38:49,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:38:49,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:38:49,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:38:49,380 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:38:49,380 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:38:49,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:38:49,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:38:49,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:38:49,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:38:49,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:38:49,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:38:49,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:38:49,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:38:49,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 02:38:49,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 02:38:49,382 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:38:49,382 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:38:49,382 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:38:49,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:38:49,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-12-17 02:38:49,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:38:49,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:38:49,575 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:38:49,576 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:38:49,576 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:38:49,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-17 02:38:49,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20555b9c/bfddece1f42f4675abe5aaebecb709cc/FLAG0c893ab0b [2021-12-17 02:38:49,992 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:38:49,992 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-17 02:38:49,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20555b9c/bfddece1f42f4675abe5aaebecb709cc/FLAG0c893ab0b [2021-12-17 02:38:50,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d20555b9c/bfddece1f42f4675abe5aaebecb709cc [2021-12-17 02:38:50,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:38:50,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:38:50,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:38:50,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:38:50,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:38:50,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42252d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50, skipping insertion in model container [2021-12-17 02:38:50,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:38:50,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:38:50,148 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/bitvector/num_conversion_2.c[685,698] [2021-12-17 02:38:50,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:38:50,209 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:38:50,218 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/bitvector/num_conversion_2.c[685,698] [2021-12-17 02:38:50,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:38:50,232 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:38:50,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50 WrapperNode [2021-12-17 02:38:50,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:38:50,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:38:50,234 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:38:50,234 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:38:50,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,246 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,260 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-17 02:38:50,261 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:38:50,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:38:50,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:38:50,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:38:50,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,281 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:38:50,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:38:50,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:38:50,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:38:50,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (1/1) ... [2021-12-17 02:38:50,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:38:50,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:38:50,313 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 02:38:50,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 02:38:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:38:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:38:50,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:38:50,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 02:38:50,405 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:38:50,406 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:38:50,488 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:38:50,491 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:38:50,492 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 02:38:50,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:38:50 BoogieIcfgContainer [2021-12-17 02:38:50,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:38:50,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:38:50,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:38:50,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:38:50,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:38:50" (1/3) ... [2021-12-17 02:38:50,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66998826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:38:50, skipping insertion in model container [2021-12-17 02:38:50,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:50" (2/3) ... [2021-12-17 02:38:50,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66998826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:38:50, skipping insertion in model container [2021-12-17 02:38:50,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:38:50" (3/3) ... [2021-12-17 02:38:50,507 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-12-17 02:38:50,510 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:38:50,510 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:38:50,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:38:50,557 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 02:38:50,557 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:38:50,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 02:38:50,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:50,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 02:38:50,574 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-12-17 02:38:50,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:38:50,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955781136] [2021-12-17 02:38:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:50,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:38:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:38:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:50,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:38:50,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955781136] [2021-12-17 02:38:50,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955781136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:38:50,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:38:50,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 02:38:50,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445014147] [2021-12-17 02:38:50,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:38:50,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 02:38:50,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:38:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 02:38:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:38:50,720 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:38:50,731 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-17 02:38:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 02:38:50,737 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 02:38:50,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:38:50,742 INFO L225 Difference]: With dead ends: 21 [2021-12-17 02:38:50,742 INFO L226 Difference]: Without dead ends: 9 [2021-12-17 02:38:50,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:38:50,747 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:38:50,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:38:50,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-17 02:38:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-17 02:38:50,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-17 02:38:50,766 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-17 02:38:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:38:50,767 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-17 02:38:50,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-17 02:38:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 02:38:50,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:50,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 02:38:50,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 02:38:50,768 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:50,771 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-12-17 02:38:50,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:38:50,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106932946] [2021-12-17 02:38:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:50,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:38:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:38:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:50,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:38:50,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106932946] [2021-12-17 02:38:50,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106932946] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:38:50,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:38:50,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:38:50,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992776353] [2021-12-17 02:38:50,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:38:50,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:38:50,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:38:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:38:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:38:50,867 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:38:50,874 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-17 02:38:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:38:50,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 02:38:50,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:38:50,875 INFO L225 Difference]: With dead ends: 16 [2021-12-17 02:38:50,875 INFO L226 Difference]: Without dead ends: 12 [2021-12-17 02:38:50,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:38:50,877 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:38:50,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:38:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-17 02:38:50,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-17 02:38:50,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-17 02:38:50,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-17 02:38:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:38:50,880 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-17 02:38:50,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-17 02:38:50,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 02:38:50,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:50,895 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:38:50,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 02:38:50,896 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:50,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-12-17 02:38:50,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:38:50,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065201518] [2021-12-17 02:38:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:50,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:38:50,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:38:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:50,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:38:50,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065201518] [2021-12-17 02:38:50,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065201518] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:38:50,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946388258] [2021-12-17 02:38:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:50,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:38:50,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:38:50,945 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:38:50,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 02:38:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:38:50,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 02:38:51,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:38:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:51,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:38:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:51,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946388258] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:38:51,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:38:51,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 8 [2021-12-17 02:38:51,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126413792] [2021-12-17 02:38:51,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:38:51,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:38:51,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:38:51,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:38:51,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:38:51,144 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:38:51,220 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-12-17 02:38:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:38:51,221 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 02:38:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:38:51,222 INFO L225 Difference]: With dead ends: 23 [2021-12-17 02:38:51,222 INFO L226 Difference]: Without dead ends: 19 [2021-12-17 02:38:51,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:38:51,227 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:38:51,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:38:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-17 02:38:51,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-17 02:38:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-17 02:38:51,236 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-17 02:38:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:38:51,237 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-17 02:38:51,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-17 02:38:51,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 02:38:51,238 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:51,238 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 02:38:51,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 02:38:51,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:38:51,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:51,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-12-17 02:38:51,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:38:51,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897339846] [2021-12-17 02:38:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:51,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:38:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:38:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:51,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:38:51,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897339846] [2021-12-17 02:38:51,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897339846] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 02:38:51,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639655309] [2021-12-17 02:38:51,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:38:51,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 02:38:51,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:38:51,556 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 02:38:51,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 02:38:51,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:38:51,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:38:51,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-17 02:38:51,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:38:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:51,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:38:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:51,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639655309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:38:51,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 02:38:51,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 17 [2021-12-17 02:38:51,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878971807] [2021-12-17 02:38:51,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 02:38:51,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 02:38:51,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:38:51,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 02:38:51,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:38:51,824 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:38:52,011 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-17 02:38:52,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:38:52,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-17 02:38:52,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:38:52,012 INFO L225 Difference]: With dead ends: 35 [2021-12-17 02:38:52,013 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 02:38:52,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-12-17 02:38:52,014 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:38:52,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 98 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 02:38:52,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 02:38:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-17 02:38:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-17 02:38:52,018 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-12-17 02:38:52,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:38:52,019 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-17 02:38:52,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-17 02:38:52,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:38:52,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:52,020 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-17 02:38:52,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 02:38:52,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-17 02:38:52,232 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:52,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-12-17 02:38:52,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:38:52,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059970979] [2021-12-17 02:38:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:52,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:38:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 02:38:52,262 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 02:38:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 02:38:52,285 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 02:38:52,285 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 02:38:52,286 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 02:38:52,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 02:38:52,289 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2021-12-17 02:38:52,290 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 02:38:52,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 02:38:52 BoogieIcfgContainer [2021-12-17 02:38:52,309 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 02:38:52,309 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 02:38:52,309 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 02:38:52,309 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 02:38:52,310 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:38:50" (3/4) ... [2021-12-17 02:38:52,312 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 02:38:52,312 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 02:38:52,313 INFO L158 Benchmark]: Toolchain (without parser) took 2298.69ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 67.4MB in the beginning and 78.6MB in the end (delta: -11.3MB). Peak memory consumption was 18.6MB. Max. memory is 16.1GB. [2021-12-17 02:38:52,313 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 96.5MB. Free memory was 52.8MB in the beginning and 52.7MB in the end (delta: 49.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 02:38:52,313 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.53ms. Allocated memory is still 96.5MB. Free memory was 67.2MB in the beginning and 72.3MB in the end (delta: -5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 02:38:52,313 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.88ms. Allocated memory is still 96.5MB. Free memory was 72.3MB in the beginning and 70.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 02:38:52,314 INFO L158 Benchmark]: Boogie Preprocessor took 19.86ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 69.7MB in the end (delta: 974.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 02:38:52,314 INFO L158 Benchmark]: RCFGBuilder took 210.87ms. Allocated memory is still 96.5MB. Free memory was 69.7MB in the beginning and 61.5MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 02:38:52,314 INFO L158 Benchmark]: TraceAbstraction took 1807.84ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 61.0MB in the beginning and 78.6MB in the end (delta: -17.7MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-12-17 02:38:52,314 INFO L158 Benchmark]: Witness Printer took 2.94ms. Allocated memory is still 127.9MB. Free memory is still 78.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 02:38:52,316 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 96.5MB. Free memory was 52.8MB in the beginning and 52.7MB in the end (delta: 49.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.53ms. Allocated memory is still 96.5MB. Free memory was 67.2MB in the beginning and 72.3MB in the end (delta: -5.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.88ms. Allocated memory is still 96.5MB. Free memory was 72.3MB in the beginning and 70.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.86ms. Allocated memory is still 96.5MB. Free memory was 70.7MB in the beginning and 69.7MB in the end (delta: 974.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 210.87ms. Allocated memory is still 96.5MB. Free memory was 69.7MB in the beginning and 61.5MB in the end (delta: 8.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1807.84ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 61.0MB in the beginning and 78.6MB in the end (delta: -17.7MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * Witness Printer took 2.94ms. Allocated memory is still 127.9MB. Free memory is still 78.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 16]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 31, overapproximation of bitwiseAnd at line 32. Possible FailurePath: [L24] unsigned char x = __VERIFIER_nondet_uchar(); [L25] unsigned char y; [L26] unsigned char c; [L28] y = 0 [L29] c = 0 VAL [c=0, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=0, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=0, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=1, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=1, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=1, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=2, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=2, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=2, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=3, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=3, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=3, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=4, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=4, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=4, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=5, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=5, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=5, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=6, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=6, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=6, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=7, y=0] [L30] COND TRUE c < (unsigned char)8 [L31] unsigned char i = ((unsigned char)1) << c; [L32] unsigned char bit = x & i; VAL [c=7, y=0] [L33] COND FALSE !(bit != (unsigned char)0) VAL [bit=0, c=7, y=0] [L36] c = c + ((unsigned char)1) VAL [bit=0, c=8, y=0] [L30] COND FALSE !(c < (unsigned char)8) VAL [bit=0, c=8, y=0] [L38] CALL __VERIFIER_assert(x == y) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 86 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 86 mSDsluCounter, 155 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 107 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 99 IncrementalHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 48 mSDtfsCounter, 99 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=4, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 96 NumberOfCodeBlocks, 96 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 85 ConstructedInterpolants, 0 QuantifiedInterpolants, 499 SizeOfPredicates, 4 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-17 02:38:52,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/bitvector/num_conversion_2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:38:54,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:38:54,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:38:54,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:38:54,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:38:54,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:38:54,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:38:54,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:38:54,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:38:54,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:38:54,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:38:54,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:38:54,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:38:54,279 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:38:54,280 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:38:54,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:38:54,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:38:54,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:38:54,287 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:38:54,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:38:54,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:38:54,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:38:54,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:38:54,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:38:54,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:38:54,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:38:54,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:38:54,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:38:54,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:38:54,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:38:54,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:38:54,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:38:54,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:38:54,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:38:54,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:38:54,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:38:54,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:38:54,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:38:54,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:38:54,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:38:54,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:38:54,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-17 02:38:54,335 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:38:54,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:38:54,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:38:54,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:38:54,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:38:54,337 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:38:54,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:38:54,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:38:54,339 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:38:54,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:38:54,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:38:54,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:38:54,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:38:54,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:38:54,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:38:54,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:38:54,340 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-17 02:38:54,340 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-17 02:38:54,341 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-17 02:38:54,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:38:54,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:38:54,341 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:38:54,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:38:54,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:38:54,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:38:54,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:38:54,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:38:54,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:38:54,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:38:54,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:38:54,349 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-17 02:38:54,349 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-17 02:38:54,350 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:38:54,350 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:38:54,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:38:54,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:38:54,350 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-17 02:38:54,351 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e0da033eb6b5a3b4db0394198751cf880534ee28b64f0bd7b196bfba1d785e1 [2021-12-17 02:38:54,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:38:54,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:38:54,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:38:54,608 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:38:54,609 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:38:54,610 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-17 02:38:54,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e0653de/abc69c8847d94a628bc28dceda5bec63/FLAG3ce1499fc [2021-12-17 02:38:54,947 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:38:54,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/num_conversion_2.c [2021-12-17 02:38:54,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e0653de/abc69c8847d94a628bc28dceda5bec63/FLAG3ce1499fc [2021-12-17 02:38:55,386 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c6e0653de/abc69c8847d94a628bc28dceda5bec63 [2021-12-17 02:38:55,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:38:55,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:38:55,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:38:55,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:38:55,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:38:55,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,414 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dda9f46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55, skipping insertion in model container [2021-12-17 02:38:55,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:38:55,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:38:55,538 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/bitvector/num_conversion_2.c[685,698] [2021-12-17 02:38:55,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:38:55,564 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:38:55,573 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/bitvector/num_conversion_2.c[685,698] [2021-12-17 02:38:55,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:38:55,587 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:38:55,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55 WrapperNode [2021-12-17 02:38:55,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:38:55,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:38:55,589 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:38:55,589 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:38:55,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,653 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-17 02:38:55,653 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:38:55,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:38:55,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:38:55,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:38:55,659 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,667 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,667 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:38:55,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:38:55,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:38:55,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:38:55,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (1/1) ... [2021-12-17 02:38:55,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:38:55,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:38:55,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 02:38:55,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 02:38:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:38:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:38:55,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:38:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 02:38:55,782 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:38:55,784 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:38:55,884 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:38:55,888 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:38:55,889 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 02:38:55,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:38:55 BoogieIcfgContainer [2021-12-17 02:38:55,890 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:38:55,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:38:55,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:38:55,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:38:55,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:38:55" (1/3) ... [2021-12-17 02:38:55,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dda6e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:38:55, skipping insertion in model container [2021-12-17 02:38:55,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:38:55" (2/3) ... [2021-12-17 02:38:55,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dda6e43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:38:55, skipping insertion in model container [2021-12-17 02:38:55,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:38:55" (3/3) ... [2021-12-17 02:38:55,896 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_2.c [2021-12-17 02:38:55,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:38:55,900 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:38:55,935 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:38:55,941 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 02:38:55,942 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:38:55,954 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 02:38:55,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:55,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 02:38:55,958 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:55,962 INFO L85 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-12-17 02:38:55,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:38:55,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [995971868] [2021-12-17 02:38:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:55,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:38:55,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:38:55,973 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:38:55,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 02:38:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:38:56,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 02:38:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:38:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:56,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:38:56,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:38:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [995971868] [2021-12-17 02:38:56,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [995971868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:38:56,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:38:56,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 02:38:56,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169257688] [2021-12-17 02:38:56,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:38:56,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 02:38:56,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:38:56,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 02:38:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:38:56,074 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:38:56,082 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-17 02:38:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 02:38:56,083 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 02:38:56,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:38:56,099 INFO L225 Difference]: With dead ends: 21 [2021-12-17 02:38:56,100 INFO L226 Difference]: Without dead ends: 9 [2021-12-17 02:38:56,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 02:38:56,104 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:38:56,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:38:56,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-17 02:38:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-17 02:38:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-17 02:38:56,129 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-17 02:38:56,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:38:56,130 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-17 02:38:56,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-17 02:38:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 02:38:56,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:56,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 02:38:56,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 02:38:56,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:38:56,339 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:56,340 INFO L85 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-12-17 02:38:56,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:38:56,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551665307] [2021-12-17 02:38:56,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:56,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:38:56,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:38:56,343 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:38:56,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 02:38:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:38:56,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 02:38:56,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:38:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:56,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 02:38:56,399 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:38:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551665307] [2021-12-17 02:38:56,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551665307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:38:56,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:38:56,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 02:38:56,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180952845] [2021-12-17 02:38:56,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:38:56,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 02:38:56,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:38:56,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 02:38:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:38:56,409 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:38:56,416 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-17 02:38:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 02:38:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-17 02:38:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:38:56,417 INFO L225 Difference]: With dead ends: 16 [2021-12-17 02:38:56,418 INFO L226 Difference]: Without dead ends: 12 [2021-12-17 02:38:56,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 02:38:56,419 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:38:56,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:38:56,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-17 02:38:56,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-12-17 02:38:56,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-12-17 02:38:56,422 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-12-17 02:38:56,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:38:56,422 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-12-17 02:38:56,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,422 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-12-17 02:38:56,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 02:38:56,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:56,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:38:56,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 02:38:56,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:38:56,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:56,633 INFO L85 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-12-17 02:38:56,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:38:56,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879805379] [2021-12-17 02:38:56,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:38:56,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:38:56,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:38:56,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:38:56,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 02:38:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:38:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 02:38:56,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:38:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:56,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:38:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:56,736 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:38:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879805379] [2021-12-17 02:38:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879805379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:38:56,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:38:56,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-17 02:38:56,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117260401] [2021-12-17 02:38:56,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:38:56,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:38:56,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:38:56,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:38:56,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:38:56,739 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:38:56,774 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-12-17 02:38:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 02:38:56,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-17 02:38:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:38:56,776 INFO L225 Difference]: With dead ends: 23 [2021-12-17 02:38:56,776 INFO L226 Difference]: Without dead ends: 19 [2021-12-17 02:38:56,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:38:56,779 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:38:56,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:38:56,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-17 02:38:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-17 02:38:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-17 02:38:56,786 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-12-17 02:38:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:38:56,786 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-17 02:38:56,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-17 02:38:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-17 02:38:56,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:56,794 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 02:38:56,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 02:38:56,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:38:57,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:57,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:57,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 2 times [2021-12-17 02:38:57,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:38:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544836119] [2021-12-17 02:38:57,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:38:57,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:38:57,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:38:57,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:38:57,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 02:38:57,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:38:57,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:38:57,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 02:38:57,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:38:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:57,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:38:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:38:57,217 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:38:57,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544836119] [2021-12-17 02:38:57,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544836119] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:38:57,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:38:57,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-17 02:38:57,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358091146] [2021-12-17 02:38:57,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:38:57,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 02:38:57,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:38:57,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 02:38:57,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:38:57,219 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:38:57,283 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2021-12-17 02:38:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:38:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-17 02:38:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:38:57,284 INFO L225 Difference]: With dead ends: 35 [2021-12-17 02:38:57,284 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 02:38:57,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:38:57,285 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:38:57,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 82 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 02:38:57,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 02:38:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-17 02:38:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-12-17 02:38:57,290 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2021-12-17 02:38:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:38:57,290 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-12-17 02:38:57,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:38:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-12-17 02:38:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:38:57,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:38:57,291 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-12-17 02:38:57,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-17 02:38:57,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:38:57,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:38:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:38:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1720528430, now seen corresponding path program 3 times [2021-12-17 02:38:57,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:38:57,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201159140] [2021-12-17 02:38:57,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:38:57,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:38:57,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:38:57,504 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:38:57,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 02:38:57,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 02:38:57,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:38:57,531 WARN L261 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 02:38:57,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:39:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:39:00,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:39:02,609 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:39:02,609 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:39:02,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201159140] [2021-12-17 02:39:02,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201159140] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:39:02,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:39:02,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2021-12-17 02:39:02,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736995091] [2021-12-17 02:39:02,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:39:02,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-17 02:39:02,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:39:02,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-17 02:39:02,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=2170, Unknown=0, NotChecked=0, Total=2756 [2021-12-17 02:39:02,611 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:07,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:39:07,793 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-12-17 02:39:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-17 02:39:07,795 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:39:07,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:39:07,795 INFO L225 Difference]: With dead ends: 96 [2021-12-17 02:39:07,796 INFO L226 Difference]: Without dead ends: 92 [2021-12-17 02:39:07,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1669, Invalid=5813, Unknown=0, NotChecked=0, Total=7482 [2021-12-17 02:39:07,798 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:39:07,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 55 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 165 Invalid, 0 Unknown, 263 Unchecked, 0.3s Time] [2021-12-17 02:39:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-17 02:39:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 52. [2021-12-17 02:39:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 51 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-12-17 02:39:07,805 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 30 [2021-12-17 02:39:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:39:07,805 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-12-17 02:39:07,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-12-17 02:39:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:39:07,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:39:07,806 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:39:07,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 02:39:08,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:39:08,013 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:39:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:39:08,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1777786732, now seen corresponding path program 1 times [2021-12-17 02:39:08,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:39:08,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1499427960] [2021-12-17 02:39:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:39:08,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:39:08,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:39:08,015 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:39:08,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 02:39:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:39:08,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 02:39:08,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:39:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:39:09,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:39:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:39:11,671 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:39:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1499427960] [2021-12-17 02:39:11,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1499427960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:39:11,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:39:11,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:39:11,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789260759] [2021-12-17 02:39:11,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:39:11,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:39:11,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:39:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:39:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2240, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:39:11,673 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:39:42,453 INFO L93 Difference]: Finished difference Result 319 states and 417 transitions. [2021-12-17 02:39:42,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2021-12-17 02:39:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:39:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:39:42,462 INFO L225 Difference]: With dead ends: 319 [2021-12-17 02:39:42,462 INFO L226 Difference]: Without dead ends: 285 [2021-12-17 02:39:42,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16710 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=7758, Invalid=41748, Unknown=0, NotChecked=0, Total=49506 [2021-12-17 02:39:42,480 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 277 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:39:42,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 115 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 1598 Invalid, 0 Unknown, 136 Unchecked, 2.0s Time] [2021-12-17 02:39:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-12-17 02:39:42,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 160. [2021-12-17 02:39:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.3647798742138364) internal successors, (217), 159 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 217 transitions. [2021-12-17 02:39:42,505 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 217 transitions. Word has length 30 [2021-12-17 02:39:42,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:39:42,505 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 217 transitions. [2021-12-17 02:39:42,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:39:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 217 transitions. [2021-12-17 02:39:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:39:42,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:39:42,507 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:39:42,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-17 02:39:42,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:39:42,712 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:39:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:39:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1894380496, now seen corresponding path program 2 times [2021-12-17 02:39:42,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:39:42,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811172647] [2021-12-17 02:39:42,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:39:42,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:39:42,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:39:42,717 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:39:42,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 02:39:42,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:39:42,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:39:42,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 37 conjunts are in the unsatisfiable core [2021-12-17 02:39:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:39:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:39:43,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:39:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:39:46,694 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:39:46,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811172647] [2021-12-17 02:39:46,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811172647] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:39:46,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:39:46,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:39:46,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147057151] [2021-12-17 02:39:46,695 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:39:46,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:39:46,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:39:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:39:46,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=2283, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:39:46,697 INFO L87 Difference]: Start difference. First operand 160 states and 217 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:40:17,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:40:17,350 INFO L93 Difference]: Finished difference Result 395 states and 511 transitions. [2021-12-17 02:40:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-12-17 02:40:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:40:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:40:17,352 INFO L225 Difference]: With dead ends: 395 [2021-12-17 02:40:17,352 INFO L226 Difference]: Without dead ends: 338 [2021-12-17 02:40:17,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13552 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=5749, Invalid=34451, Unknown=0, NotChecked=0, Total=40200 [2021-12-17 02:40:17,364 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 277 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:40:17,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 134 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1687 Invalid, 0 Unknown, 105 Unchecked, 1.8s Time] [2021-12-17 02:40:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-12-17 02:40:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 184. [2021-12-17 02:40:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.349726775956284) internal successors, (247), 183 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:40:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 247 transitions. [2021-12-17 02:40:17,382 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 247 transitions. Word has length 30 [2021-12-17 02:40:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:40:17,382 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 247 transitions. [2021-12-17 02:40:17,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:40:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 247 transitions. [2021-12-17 02:40:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:40:17,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:40:17,383 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:40:17,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-17 02:40:17,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:40:17,590 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:40:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:40:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1978693868, now seen corresponding path program 3 times [2021-12-17 02:40:17,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:40:17,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130480182] [2021-12-17 02:40:17,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:40:17,591 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:40:17,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:40:17,592 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:40:17,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 02:40:17,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 02:40:17,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:40:17,621 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 02:40:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:40:19,273 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:40:19,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:40:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:40:22,625 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:40:22,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130480182] [2021-12-17 02:40:22,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130480182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:40:22,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:40:22,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:40:22,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094759392] [2021-12-17 02:40:22,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:40:22,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:40:22,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:40:22,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:40:22,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2398, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:40:22,628 INFO L87 Difference]: Start difference. First operand 184 states and 247 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:40:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:40:29,721 INFO L93 Difference]: Finished difference Result 409 states and 537 transitions. [2021-12-17 02:40:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-17 02:40:29,722 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:40:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:40:29,725 INFO L225 Difference]: With dead ends: 409 [2021-12-17 02:40:29,725 INFO L226 Difference]: Without dead ends: 403 [2021-12-17 02:40:29,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1311, Invalid=5999, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 02:40:29,729 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 419 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:40:29,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 69 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 178 Invalid, 0 Unknown, 419 Unchecked, 0.2s Time] [2021-12-17 02:40:29,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-17 02:40:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 263. [2021-12-17 02:40:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3435114503816794) internal successors, (352), 262 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:40:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 352 transitions. [2021-12-17 02:40:29,765 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 352 transitions. Word has length 30 [2021-12-17 02:40:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:40:29,766 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 352 transitions. [2021-12-17 02:40:29,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:40:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 352 transitions. [2021-12-17 02:40:29,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:40:29,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:40:29,771 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:40:29,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-12-17 02:40:29,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:40:29,978 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:40:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:40:29,979 INFO L85 PathProgramCache]: Analyzing trace with hash -2035952170, now seen corresponding path program 4 times [2021-12-17 02:40:29,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:40:29,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298278526] [2021-12-17 02:40:29,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 02:40:29,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:40:29,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:40:29,981 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:40:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 02:40:30,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 02:40:30,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:40:30,017 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 02:40:30,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:40:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:40:30,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:40:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:40:33,699 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:40:33,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298278526] [2021-12-17 02:40:33,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298278526] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:40:33,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:40:33,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:40:33,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212447840] [2021-12-17 02:40:33,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:40:33,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:40:33,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:40:33,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:40:33,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2256, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:40:33,702 INFO L87 Difference]: Start difference. First operand 263 states and 352 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:41:15,272 INFO L93 Difference]: Finished difference Result 587 states and 774 transitions. [2021-12-17 02:41:15,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-17 02:41:15,274 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:41:15,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:41:15,279 INFO L225 Difference]: With dead ends: 587 [2021-12-17 02:41:15,279 INFO L226 Difference]: Without dead ends: 565 [2021-12-17 02:41:15,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20028 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=8138, Invalid=49222, Unknown=0, NotChecked=0, Total=57360 [2021-12-17 02:41:15,286 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 281 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 2449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:41:15,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 145 Invalid, 2449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [512 Valid, 1810 Invalid, 0 Unknown, 127 Unchecked, 2.2s Time] [2021-12-17 02:41:15,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-17 02:41:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 382. [2021-12-17 02:41:15,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.3595800524934383) internal successors, (518), 381 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 518 transitions. [2021-12-17 02:41:15,348 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 518 transitions. Word has length 30 [2021-12-17 02:41:15,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:41:15,349 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 518 transitions. [2021-12-17 02:41:15,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:15,349 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 518 transitions. [2021-12-17 02:41:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:41:15,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:41:15,350 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:41:15,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 02:41:15,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:41:15,554 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:41:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:41:15,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1636215058, now seen corresponding path program 5 times [2021-12-17 02:41:15,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:41:15,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707683365] [2021-12-17 02:41:15,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 02:41:15,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:41:15,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:41:15,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:41:15,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 02:41:15,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-17 02:41:15,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:41:15,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 02:41:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:41:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:41:16,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:41:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:41:19,276 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:41:19,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707683365] [2021-12-17 02:41:19,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707683365] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:41:19,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:41:19,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:41:19,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349547279] [2021-12-17 02:41:19,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:41:19,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:41:19,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:41:19,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:41:19,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:41:19,282 INFO L87 Difference]: Start difference. First operand 382 states and 518 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:41:47,991 INFO L93 Difference]: Finished difference Result 620 states and 831 transitions. [2021-12-17 02:41:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-17 02:41:47,992 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:41:47,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:41:48,004 INFO L225 Difference]: With dead ends: 620 [2021-12-17 02:41:48,005 INFO L226 Difference]: Without dead ends: 579 [2021-12-17 02:41:48,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8553 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=4227, Invalid=24503, Unknown=0, NotChecked=0, Total=28730 [2021-12-17 02:41:48,007 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 177 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:41:48,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 80 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1659 Invalid, 0 Unknown, 93 Unchecked, 1.7s Time] [2021-12-17 02:41:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-12-17 02:41:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 428. [2021-12-17 02:41:48,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 1.3559718969555035) internal successors, (579), 427 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:48,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 579 transitions. [2021-12-17 02:41:48,069 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 579 transitions. Word has length 30 [2021-12-17 02:41:48,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:41:48,069 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 579 transitions. [2021-12-17 02:41:48,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:48,070 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 579 transitions. [2021-12-17 02:41:48,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:41:48,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:41:48,071 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:41:48,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 02:41:48,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:41:48,278 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:41:48,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:41:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1578956756, now seen corresponding path program 6 times [2021-12-17 02:41:48,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:41:48,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498911182] [2021-12-17 02:41:48,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 02:41:48,279 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:41:48,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:41:48,280 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:41:48,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 02:41:48,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 02:41:48,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:41:48,330 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 02:41:48,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:41:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:41:49,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:41:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:41:52,634 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:41:52,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498911182] [2021-12-17 02:41:52,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498911182] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:41:52,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:41:52,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:41:52,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229393485] [2021-12-17 02:41:52,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:41:52,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:41:52,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:41:52,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:41:52,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2449, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:41:52,636 INFO L87 Difference]: Start difference. First operand 428 states and 579 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:58,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:41:58,231 INFO L93 Difference]: Finished difference Result 623 states and 844 transitions. [2021-12-17 02:41:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-17 02:41:58,231 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:41:58,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:41:58,233 INFO L225 Difference]: With dead ends: 623 [2021-12-17 02:41:58,233 INFO L226 Difference]: Without dead ends: 617 [2021-12-17 02:41:58,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=895, Invalid=6415, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 02:41:58,234 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:41:58,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 89 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 220 Invalid, 0 Unknown, 243 Unchecked, 0.1s Time] [2021-12-17 02:41:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-17 02:41:58,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 550. [2021-12-17 02:41:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.3734061930783241) internal successors, (754), 549 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 754 transitions. [2021-12-17 02:41:58,295 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 754 transitions. Word has length 30 [2021-12-17 02:41:58,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:41:58,295 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 754 transitions. [2021-12-17 02:41:58,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:41:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 754 transitions. [2021-12-17 02:41:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:41:58,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:41:58,296 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:41:58,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-17 02:41:58,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:41:58,502 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:41:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:41:58,503 INFO L85 PathProgramCache]: Analyzing trace with hash -497923054, now seen corresponding path program 7 times [2021-12-17 02:41:58,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:41:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287583120] [2021-12-17 02:41:58,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 02:41:58,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:41:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:41:58,505 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:41:58,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 02:41:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:41:58,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 02:41:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:41:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:41:59,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:42:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:42:01,974 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:42:01,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287583120] [2021-12-17 02:42:01,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287583120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:42:01,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:42:01,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:42:01,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131011597] [2021-12-17 02:42:01,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:42:01,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:42:01,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:42:01,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:42:01,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:42:01,976 INFO L87 Difference]: Start difference. First operand 550 states and 754 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:42:19,581 INFO L93 Difference]: Finished difference Result 776 states and 1047 transitions. [2021-12-17 02:42:19,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-12-17 02:42:19,596 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:42:19,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:42:19,598 INFO L225 Difference]: With dead ends: 776 [2021-12-17 02:42:19,598 INFO L226 Difference]: Without dead ends: 762 [2021-12-17 02:42:19,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7734 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=2487, Invalid=22635, Unknown=0, NotChecked=0, Total=25122 [2021-12-17 02:42:19,599 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:42:19,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 101 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1385 Invalid, 0 Unknown, 100 Unchecked, 1.4s Time] [2021-12-17 02:42:19,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-12-17 02:42:19,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 640. [2021-12-17 02:42:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.3708920187793427) internal successors, (876), 639 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 876 transitions. [2021-12-17 02:42:19,675 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 876 transitions. Word has length 30 [2021-12-17 02:42:19,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:42:19,676 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 876 transitions. [2021-12-17 02:42:19,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 876 transitions. [2021-12-17 02:42:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:42:19,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:42:19,677 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:42:19,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-17 02:42:19,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:42:19,884 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:42:19,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:42:19,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1120723122, now seen corresponding path program 8 times [2021-12-17 02:42:19,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:42:19,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204716430] [2021-12-17 02:42:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:42:19,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:42:19,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:42:19,886 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:42:19,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 02:42:19,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:42:19,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:42:19,909 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 02:42:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:42:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:42:20,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:42:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:42:23,264 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:42:23,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204716430] [2021-12-17 02:42:23,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204716430] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:42:23,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:42:23,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:42:23,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172446186] [2021-12-17 02:42:23,265 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:42:23,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:42:23,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:42:23,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:42:23,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=2285, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:42:23,267 INFO L87 Difference]: Start difference. First operand 640 states and 876 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:51,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:42:51,156 INFO L93 Difference]: Finished difference Result 866 states and 1165 transitions. [2021-12-17 02:42:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-12-17 02:42:51,156 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:42:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:42:51,159 INFO L225 Difference]: With dead ends: 866 [2021-12-17 02:42:51,159 INFO L226 Difference]: Without dead ends: 831 [2021-12-17 02:42:51,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10070 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=4419, Invalid=28161, Unknown=0, NotChecked=0, Total=32580 [2021-12-17 02:42:51,160 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 184 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:42:51,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 174 Invalid, 2006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1661 Invalid, 0 Unknown, 88 Unchecked, 1.7s Time] [2021-12-17 02:42:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-12-17 02:42:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 681. [2021-12-17 02:42:51,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.3691176470588236) internal successors, (931), 680 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 931 transitions. [2021-12-17 02:42:51,242 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 931 transitions. Word has length 30 [2021-12-17 02:42:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:42:51,242 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 931 transitions. [2021-12-17 02:42:51,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:42:51,242 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 931 transitions. [2021-12-17 02:42:51,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:42:51,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:42:51,243 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:42:51,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-12-17 02:42:51,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:42:51,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:42:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:42:51,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1378888560, now seen corresponding path program 9 times [2021-12-17 02:42:51,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:42:51,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469738910] [2021-12-17 02:42:51,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:42:51,450 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:42:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:42:51,458 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:42:51,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 02:42:51,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 02:42:51,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:42:51,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 02:42:51,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:42:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:42:53,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:42:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:42:56,900 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:42:56,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469738910] [2021-12-17 02:42:56,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469738910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:42:56,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:42:56,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:42:56,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274755129] [2021-12-17 02:42:56,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:42:56,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:42:56,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:42:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:42:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2401, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:42:56,902 INFO L87 Difference]: Start difference. First operand 681 states and 931 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:43:04,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:43:04,306 INFO L93 Difference]: Finished difference Result 1022 states and 1381 transitions. [2021-12-17 02:43:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-17 02:43:04,307 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:43:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:43:04,309 INFO L225 Difference]: With dead ends: 1022 [2021-12-17 02:43:04,310 INFO L226 Difference]: Without dead ends: 1016 [2021-12-17 02:43:04,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1687, Invalid=9025, Unknown=0, NotChecked=0, Total=10712 [2021-12-17 02:43:04,311 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 59 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:43:04,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 67 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 159 Invalid, 0 Unknown, 306 Unchecked, 0.2s Time] [2021-12-17 02:43:04,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-12-17 02:43:04,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 866. [2021-12-17 02:43:04,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.3745664739884393) internal successors, (1189), 865 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:43:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1189 transitions. [2021-12-17 02:43:04,433 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1189 transitions. Word has length 30 [2021-12-17 02:43:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:43:04,434 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1189 transitions. [2021-12-17 02:43:04,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:43:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1189 transitions. [2021-12-17 02:43:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:43:04,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:43:04,435 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 02:43:04,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-17 02:43:04,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:43:04,641 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:43:04,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:43:04,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1436146862, now seen corresponding path program 10 times [2021-12-17 02:43:04,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:43:04,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614768494] [2021-12-17 02:43:04,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 02:43:04,642 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:43:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:43:04,643 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:43:04,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-17 02:43:04,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 02:43:04,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:43:04,665 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 02:43:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:43:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:43:05,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:43:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:43:08,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:43:08,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614768494] [2021-12-17 02:43:08,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614768494] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:43:08,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:43:08,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:43:08,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705673154] [2021-12-17 02:43:08,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:43:08,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:43:08,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:43:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:43:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:43:08,338 INFO L87 Difference]: Start difference. First operand 866 states and 1189 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:43:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:43:45,682 INFO L93 Difference]: Finished difference Result 1142 states and 1552 transitions. [2021-12-17 02:43:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-12-17 02:43:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:43:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:43:45,692 INFO L225 Difference]: With dead ends: 1142 [2021-12-17 02:43:45,692 INFO L226 Difference]: Without dead ends: 1120 [2021-12-17 02:43:45,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12469 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=6080, Invalid=33322, Unknown=0, NotChecked=0, Total=39402 [2021-12-17 02:43:45,696 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 231 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2128 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:43:45,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 163 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2128 Invalid, 0 Unknown, 131 Unchecked, 2.3s Time] [2021-12-17 02:43:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-12-17 02:43:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 937. [2021-12-17 02:43:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 1.3803418803418803) internal successors, (1292), 936 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:43:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1292 transitions. [2021-12-17 02:43:45,867 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1292 transitions. Word has length 30 [2021-12-17 02:43:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:43:45,867 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1292 transitions. [2021-12-17 02:43:45,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:43:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1292 transitions. [2021-12-17 02:43:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:43:45,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:43:45,869 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:43:45,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-17 02:43:46,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:43:46,077 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:43:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:43:46,078 INFO L85 PathProgramCache]: Analyzing trace with hash 216357974, now seen corresponding path program 11 times [2021-12-17 02:43:46,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:43:46,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087195902] [2021-12-17 02:43:46,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 02:43:46,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:43:46,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:43:46,079 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:43:46,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 02:43:46,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-17 02:43:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:43:46,107 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 02:43:46,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:43:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:43:47,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:43:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:43:49,464 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:43:49,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087195902] [2021-12-17 02:43:49,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087195902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:43:49,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:43:49,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:43:49,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117364332] [2021-12-17 02:43:49,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:43:49,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:43:49,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:43:49,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:43:49,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:43:49,466 INFO L87 Difference]: Start difference. First operand 937 states and 1292 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:44:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:44:22,807 INFO L93 Difference]: Finished difference Result 1274 states and 1751 transitions. [2021-12-17 02:44:22,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-12-17 02:44:22,809 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:44:22,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:44:22,811 INFO L225 Difference]: With dead ends: 1274 [2021-12-17 02:44:22,811 INFO L226 Difference]: Without dead ends: 1247 [2021-12-17 02:44:22,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12700 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=4921, Invalid=34879, Unknown=0, NotChecked=0, Total=39800 [2021-12-17 02:44:22,813 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 141 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:44:22,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 86 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2177 Invalid, 0 Unknown, 53 Unchecked, 2.1s Time] [2021-12-17 02:44:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-12-17 02:44:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1050. [2021-12-17 02:44:22,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 1.3775023832221163) internal successors, (1445), 1049 states have internal predecessors, (1445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:44:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1445 transitions. [2021-12-17 02:44:22,965 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1445 transitions. Word has length 30 [2021-12-17 02:44:22,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:44:22,965 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 1445 transitions. [2021-12-17 02:44:22,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:44:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1445 transitions. [2021-12-17 02:44:22,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:44:22,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:44:22,966 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:44:22,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-17 02:44:23,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:44:23,173 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:44:23,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:44:23,173 INFO L85 PathProgramCache]: Analyzing trace with hash -406442094, now seen corresponding path program 12 times [2021-12-17 02:44:23,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:44:23,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871764028] [2021-12-17 02:44:23,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 02:44:23,174 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:44:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:44:23,175 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:44:23,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-17 02:44:23,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 02:44:23,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:44:23,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-17 02:44:23,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:44:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:44:24,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:44:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:44:27,315 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:44:27,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871764028] [2021-12-17 02:44:27,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871764028] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:44:27,315 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:44:27,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:44:27,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223990188] [2021-12-17 02:44:27,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:44:27,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:44:27,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:44:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:44:27,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=2416, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:44:27,316 INFO L87 Difference]: Start difference. First operand 1050 states and 1445 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:44:43,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:44:43,897 INFO L93 Difference]: Finished difference Result 1256 states and 1720 transitions. [2021-12-17 02:44:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-12-17 02:44:43,897 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:44:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:44:43,899 INFO L225 Difference]: With dead ends: 1256 [2021-12-17 02:44:43,899 INFO L226 Difference]: Without dead ends: 1250 [2021-12-17 02:44:43,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3606 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=2341, Invalid=11939, Unknown=0, NotChecked=0, Total=14280 [2021-12-17 02:44:43,902 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 107 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:44:43,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 77 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 434 Invalid, 0 Unknown, 1132 Unchecked, 0.2s Time] [2021-12-17 02:44:43,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-12-17 02:44:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1191. [2021-12-17 02:44:44,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 1.377310924369748) internal successors, (1639), 1190 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:44:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1639 transitions. [2021-12-17 02:44:44,228 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1639 transitions. Word has length 30 [2021-12-17 02:44:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:44:44,228 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 1639 transitions. [2021-12-17 02:44:44,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:44:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1639 transitions. [2021-12-17 02:44:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:44:44,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:44:44,230 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:44:44,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-17 02:44:44,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:44:44,445 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:44:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:44:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash -463700396, now seen corresponding path program 13 times [2021-12-17 02:44:44,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:44:44,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1082938018] [2021-12-17 02:44:44,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 02:44:44,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:44:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:44:44,447 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:44:44,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 02:44:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:44:44,469 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 02:44:44,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:44:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:44:45,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:44:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:44:47,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:44:47,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1082938018] [2021-12-17 02:44:47,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1082938018] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:44:47,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:44:47,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:44:47,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214773481] [2021-12-17 02:44:47,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:44:47,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:44:47,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:44:47,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:44:47,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:44:47,958 INFO L87 Difference]: Start difference. First operand 1191 states and 1639 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:45:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:45:29,920 INFO L93 Difference]: Finished difference Result 1605 states and 2179 transitions. [2021-12-17 02:45:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-12-17 02:45:29,921 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:45:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:45:29,925 INFO L225 Difference]: With dead ends: 1605 [2021-12-17 02:45:29,925 INFO L226 Difference]: Without dead ends: 1583 [2021-12-17 02:45:29,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18248 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=6948, Invalid=46182, Unknown=0, NotChecked=0, Total=53130 [2021-12-17 02:45:29,927 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 229 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 459 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 459 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:45:29,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 177 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [459 Valid, 2059 Invalid, 0 Unknown, 132 Unchecked, 2.3s Time] [2021-12-17 02:45:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1583 states. [2021-12-17 02:45:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1583 to 1323. [2021-12-17 02:45:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 1.3789712556732223) internal successors, (1823), 1322 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:45:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1823 transitions. [2021-12-17 02:45:30,105 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1823 transitions. Word has length 30 [2021-12-17 02:45:30,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:45:30,105 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 1823 transitions. [2021-12-17 02:45:30,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:45:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1823 transitions. [2021-12-17 02:45:30,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:45:30,106 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:45:30,106 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:45:30,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-12-17 02:45:30,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:45:30,313 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:45:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:45:30,313 INFO L85 PathProgramCache]: Analyzing trace with hash -41807464, now seen corresponding path program 14 times [2021-12-17 02:45:30,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:45:30,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056928586] [2021-12-17 02:45:30,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:45:30,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:45:30,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:45:30,315 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:45:30,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-17 02:45:30,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:45:30,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:45:30,345 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 02:45:30,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:45:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:45:31,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:45:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:45:33,846 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:45:33,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056928586] [2021-12-17 02:45:33,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056928586] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:45:33,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:45:33,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:45:33,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703342618] [2021-12-17 02:45:33,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:45:33,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:45:33,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:45:33,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:45:33,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2260, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:45:33,848 INFO L87 Difference]: Start difference. First operand 1323 states and 1823 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:46:12,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:46:12,335 INFO L93 Difference]: Finished difference Result 1653 states and 2253 transitions. [2021-12-17 02:46:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2021-12-17 02:46:12,336 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:46:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:46:12,339 INFO L225 Difference]: With dead ends: 1653 [2021-12-17 02:46:12,339 INFO L226 Difference]: Without dead ends: 1635 [2021-12-17 02:46:12,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14811 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=6460, Invalid=39122, Unknown=0, NotChecked=0, Total=45582 [2021-12-17 02:46:12,341 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 234 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:46:12,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 123 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 2108 Invalid, 0 Unknown, 120 Unchecked, 2.2s Time] [2021-12-17 02:46:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-12-17 02:46:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1384. [2021-12-17 02:46:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.3796095444685466) internal successors, (1908), 1383 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:46:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1908 transitions. [2021-12-17 02:46:12,551 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1908 transitions. Word has length 30 [2021-12-17 02:46:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:46:12,551 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1908 transitions. [2021-12-17 02:46:12,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:46:12,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1908 transitions. [2021-12-17 02:46:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:46:12,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:46:12,552 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:46:12,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-17 02:46:12,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:46:12,760 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:46:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:46:12,761 INFO L85 PathProgramCache]: Analyzing trace with hash -664607532, now seen corresponding path program 15 times [2021-12-17 02:46:12,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:46:12,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1837408933] [2021-12-17 02:46:12,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:46:12,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:46:12,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:46:12,763 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:46:12,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-17 02:46:12,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 02:46:12,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:46:12,797 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 02:46:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:46:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:46:14,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:46:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:46:18,036 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:46:18,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1837408933] [2021-12-17 02:46:18,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1837408933] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:46:18,037 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:46:18,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:46:18,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38654404] [2021-12-17 02:46:18,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:46:18,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:46:18,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:46:18,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:46:18,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2411, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:46:18,038 INFO L87 Difference]: Start difference. First operand 1384 states and 1908 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:46:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:46:33,615 INFO L93 Difference]: Finished difference Result 1973 states and 2695 transitions. [2021-12-17 02:46:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-17 02:46:33,615 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:46:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:46:33,619 INFO L225 Difference]: With dead ends: 1973 [2021-12-17 02:46:33,619 INFO L226 Difference]: Without dead ends: 1967 [2021-12-17 02:46:33,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4930 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=2818, Invalid=14212, Unknown=0, NotChecked=0, Total=17030 [2021-12-17 02:46:33,621 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 143 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 836 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:46:33,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 85 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 283 Invalid, 0 Unknown, 836 Unchecked, 0.3s Time] [2021-12-17 02:46:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2021-12-17 02:46:33,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1646. [2021-12-17 02:46:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1646 states, 1645 states have (on average 1.3829787234042554) internal successors, (2275), 1645 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:46:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2275 transitions. [2021-12-17 02:46:33,886 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2275 transitions. Word has length 30 [2021-12-17 02:46:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:46:33,886 INFO L470 AbstractCegarLoop]: Abstraction has 1646 states and 2275 transitions. [2021-12-17 02:46:33,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:46:33,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2275 transitions. [2021-12-17 02:46:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:46:33,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:46:33,887 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 02:46:33,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-17 02:46:34,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:46:34,093 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:46:34,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:46:34,094 INFO L85 PathProgramCache]: Analyzing trace with hash -721865834, now seen corresponding path program 16 times [2021-12-17 02:46:34,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:46:34,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943048985] [2021-12-17 02:46:34,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 02:46:34,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:46:34,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:46:34,096 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:46:34,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-17 02:46:34,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 02:46:34,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:46:34,121 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-17 02:46:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:46:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:46:35,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:46:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:46:37,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:46:37,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943048985] [2021-12-17 02:46:37,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943048985] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:46:37,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:46:37,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:46:37,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084898727] [2021-12-17 02:46:37,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:46:37,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:46:37,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:46:37,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:46:37,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=2263, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:46:37,726 INFO L87 Difference]: Start difference. First operand 1646 states and 2275 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:47:17,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:47:17,970 INFO L93 Difference]: Finished difference Result 2062 states and 2814 transitions. [2021-12-17 02:47:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2021-12-17 02:47:17,971 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:47:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:47:17,975 INFO L225 Difference]: With dead ends: 2062 [2021-12-17 02:47:17,975 INFO L226 Difference]: Without dead ends: 2046 [2021-12-17 02:47:17,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12319 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=5623, Invalid=33779, Unknown=0, NotChecked=0, Total=39402 [2021-12-17 02:47:17,977 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 199 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:47:17,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 209 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 2554 Invalid, 0 Unknown, 121 Unchecked, 2.7s Time] [2021-12-17 02:47:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-12-17 02:47:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1731. [2021-12-17 02:47:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 1.3826589595375722) internal successors, (2392), 1730 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:47:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2392 transitions. [2021-12-17 02:47:18,246 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2392 transitions. Word has length 30 [2021-12-17 02:47:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:47:18,246 INFO L470 AbstractCegarLoop]: Abstraction has 1731 states and 2392 transitions. [2021-12-17 02:47:18,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:47:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2392 transitions. [2021-12-17 02:47:18,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:47:18,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:47:18,247 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:47:18,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-12-17 02:47:18,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:47:18,454 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:47:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:47:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1553479954, now seen corresponding path program 17 times [2021-12-17 02:47:18,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:47:18,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990642509] [2021-12-17 02:47:18,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 02:47:18,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:47:18,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:47:18,456 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:47:18,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-17 02:47:18,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-17 02:47:18,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:47:18,481 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 02:47:18,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:47:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:47:19,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:47:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:47:21,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:47:21,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990642509] [2021-12-17 02:47:21,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1990642509] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:47:21,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:47:21,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:47:21,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420526579] [2021-12-17 02:47:21,933 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:47:21,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:47:21,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:47:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:47:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:47:21,934 INFO L87 Difference]: Start difference. First operand 1731 states and 2392 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:47:46,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:47:46,208 INFO L93 Difference]: Finished difference Result 1965 states and 2701 transitions. [2021-12-17 02:47:46,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-12-17 02:47:46,209 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:47:46,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:47:46,213 INFO L225 Difference]: With dead ends: 1965 [2021-12-17 02:47:46,213 INFO L226 Difference]: Without dead ends: 1937 [2021-12-17 02:47:46,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6672 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=3568, Invalid=19994, Unknown=0, NotChecked=0, Total=23562 [2021-12-17 02:47:46,216 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 193 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:47:46,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 66 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1636 Invalid, 0 Unknown, 100 Unchecked, 1.8s Time] [2021-12-17 02:47:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2021-12-17 02:47:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1785. [2021-12-17 02:47:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1785 states, 1784 states have (on average 1.3800448430493273) internal successors, (2462), 1784 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:47:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1785 states to 1785 states and 2462 transitions. [2021-12-17 02:47:46,496 INFO L78 Accepts]: Start accepts. Automaton has 1785 states and 2462 transitions. Word has length 30 [2021-12-17 02:47:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:47:46,496 INFO L470 AbstractCegarLoop]: Abstraction has 1785 states and 2462 transitions. [2021-12-17 02:47:46,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:47:46,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1785 states and 2462 transitions. [2021-12-17 02:47:46,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:47:46,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:47:46,508 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:47:46,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-12-17 02:47:46,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:47:46,714 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:47:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:47:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1496221652, now seen corresponding path program 18 times [2021-12-17 02:47:46,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:47:46,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1567676349] [2021-12-17 02:47:46,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 02:47:46,715 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:47:46,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:47:46,716 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:47:46,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-17 02:47:46,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 02:47:46,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:47:46,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 02:47:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:47:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:47:47,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:47:50,850 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:47:50,851 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:47:50,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1567676349] [2021-12-17 02:47:50,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1567676349] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:47:50,851 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:47:50,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:47:50,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819497202] [2021-12-17 02:47:50,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:47:50,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:47:50,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:47:50,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:47:50,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=2448, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:47:50,853 INFO L87 Difference]: Start difference. First operand 1785 states and 2462 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:48:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:02,148 INFO L93 Difference]: Finished difference Result 1953 states and 2679 transitions. [2021-12-17 02:48:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 02:48:02,149 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:48:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:02,153 INFO L225 Difference]: With dead ends: 1953 [2021-12-17 02:48:02,153 INFO L226 Difference]: Without dead ends: 1947 [2021-12-17 02:48:02,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1436, Invalid=9070, Unknown=0, NotChecked=0, Total=10506 [2021-12-17 02:48:02,157 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 103 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:02,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 76 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 224 Invalid, 0 Unknown, 683 Unchecked, 0.1s Time] [2021-12-17 02:48:02,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2021-12-17 02:48:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1884. [2021-12-17 02:48:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 1.3786510886882635) internal successors, (2596), 1883 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:48:02,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 2596 transitions. [2021-12-17 02:48:02,427 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 2596 transitions. Word has length 30 [2021-12-17 02:48:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:02,428 INFO L470 AbstractCegarLoop]: Abstraction has 1884 states and 2596 transitions. [2021-12-17 02:48:02,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:48:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 2596 transitions. [2021-12-17 02:48:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:48:02,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:02,429 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:02,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-17 02:48:02,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:48:02,636 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:02,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash 873421584, now seen corresponding path program 19 times [2021-12-17 02:48:02,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:48:02,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [498999746] [2021-12-17 02:48:02,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 02:48:02,639 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:48:02,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:48:02,640 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:48:02,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-17 02:48:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:48:02,674 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 02:48:02,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:48:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:48:03,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:48:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:48:06,270 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:48:06,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [498999746] [2021-12-17 02:48:06,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [498999746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:48:06,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:48:06,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:48:06,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020863815] [2021-12-17 02:48:06,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:48:06,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:48:06,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:48:06,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:48:06,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2287, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:48:06,274 INFO L87 Difference]: Start difference. First operand 1884 states and 2596 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:48:40,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:48:40,259 INFO L93 Difference]: Finished difference Result 2149 states and 2927 transitions. [2021-12-17 02:48:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-12-17 02:48:40,261 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:48:40,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:48:40,268 INFO L225 Difference]: With dead ends: 2149 [2021-12-17 02:48:40,268 INFO L226 Difference]: Without dead ends: 2093 [2021-12-17 02:48:40,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10554 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=4333, Invalid=30077, Unknown=0, NotChecked=0, Total=34410 [2021-12-17 02:48:40,271 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 195 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1958 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:48:40,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 78 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1958 Invalid, 0 Unknown, 105 Unchecked, 2.0s Time] [2021-12-17 02:48:40,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-12-17 02:48:40,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1890. [2021-12-17 02:48:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1889 states have (on average 1.3758602435150873) internal successors, (2599), 1889 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:48:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2599 transitions. [2021-12-17 02:48:40,597 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2599 transitions. Word has length 30 [2021-12-17 02:48:40,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:48:40,597 INFO L470 AbstractCegarLoop]: Abstraction has 1890 states and 2599 transitions. [2021-12-17 02:48:40,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:48:40,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2599 transitions. [2021-12-17 02:48:40,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:48:40,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:48:40,599 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:48:40,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-17 02:48:40,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:48:40,802 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:48:40,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:48:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash 557997844, now seen corresponding path program 20 times [2021-12-17 02:48:40,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:48:40,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252529342] [2021-12-17 02:48:40,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:48:40,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:48:40,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:48:40,804 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:48:40,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-17 02:48:40,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:48:40,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:48:40,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-17 02:48:40,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:48:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:48:41,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:48:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:48:44,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:48:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252529342] [2021-12-17 02:48:44,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252529342] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:48:44,750 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:48:44,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:48:44,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124245310] [2021-12-17 02:48:44,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:48:44,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:48:44,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:48:44,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:48:44,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:48:44,752 INFO L87 Difference]: Start difference. First operand 1890 states and 2599 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:22,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:22,484 INFO L93 Difference]: Finished difference Result 2231 states and 3035 transitions. [2021-12-17 02:49:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-12-17 02:49:22,484 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:49:22,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:22,489 INFO L225 Difference]: With dead ends: 2231 [2021-12-17 02:49:22,489 INFO L226 Difference]: Without dead ends: 2213 [2021-12-17 02:49:22,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9787 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=5262, Invalid=27680, Unknown=0, NotChecked=0, Total=32942 [2021-12-17 02:49:22,491 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 179 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:22,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 144 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 2332 Invalid, 0 Unknown, 124 Unchecked, 2.7s Time] [2021-12-17 02:49:22,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-12-17 02:49:22,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 1917. [2021-12-17 02:49:22,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 1.3752609603340293) internal successors, (2635), 1916 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2635 transitions. [2021-12-17 02:49:22,794 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2635 transitions. Word has length 30 [2021-12-17 02:49:22,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:22,794 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 2635 transitions. [2021-12-17 02:49:22,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2635 transitions. [2021-12-17 02:49:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:49:22,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:22,796 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:22,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-12-17 02:49:23,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:49:23,002 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:23,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2143230256, now seen corresponding path program 21 times [2021-12-17 02:49:23,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:49:23,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271278638] [2021-12-17 02:49:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:49:23,008 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:49:23,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:49:23,009 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:49:23,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-17 02:49:23,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 02:49:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:49:23,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 02:49:23,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:49:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:25,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:49:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:27,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:49:27,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271278638] [2021-12-17 02:49:27,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271278638] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:49:27,866 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:49:27,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:49:27,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713938963] [2021-12-17 02:49:27,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:49:27,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:49:27,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:49:27,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:49:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=2353, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:49:27,869 INFO L87 Difference]: Start difference. First operand 1917 states and 2635 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:49:38,922 INFO L93 Difference]: Finished difference Result 1999 states and 2734 transitions. [2021-12-17 02:49:38,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-17 02:49:38,922 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:49:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:49:38,926 INFO L225 Difference]: With dead ends: 1999 [2021-12-17 02:49:38,927 INFO L226 Difference]: Without dead ends: 1993 [2021-12-17 02:49:38,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3455 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=2714, Invalid=9718, Unknown=0, NotChecked=0, Total=12432 [2021-12-17 02:49:38,928 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 711 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:49:38,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 84 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 293 Invalid, 0 Unknown, 711 Unchecked, 0.3s Time] [2021-12-17 02:49:38,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-12-17 02:49:39,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1935. [2021-12-17 02:49:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1934 states have (on average 1.376421923474664) internal successors, (2662), 1934 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:39,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 2662 transitions. [2021-12-17 02:49:39,261 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 2662 transitions. Word has length 30 [2021-12-17 02:49:39,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:49:39,262 INFO L470 AbstractCegarLoop]: Abstraction has 1935 states and 2662 transitions. [2021-12-17 02:49:39,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:49:39,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 2662 transitions. [2021-12-17 02:49:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:49:39,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:49:39,263 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:49:39,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-17 02:49:39,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:49:39,474 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:49:39,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:49:39,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2094478738, now seen corresponding path program 22 times [2021-12-17 02:49:39,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:49:39,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1370816223] [2021-12-17 02:49:39,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 02:49:39,475 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:49:39,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:49:39,476 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:49:39,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-17 02:49:39,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 02:49:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:49:39,499 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 02:49:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:49:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:40,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:49:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:49:42,597 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:49:42,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1370816223] [2021-12-17 02:49:42,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1370816223] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:49:42,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:49:42,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:49:42,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257762586] [2021-12-17 02:49:42,597 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:49:42,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:49:42,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:49:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:49:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:49:42,598 INFO L87 Difference]: Start difference. First operand 1935 states and 2662 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:50:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:33,124 INFO L93 Difference]: Finished difference Result 2445 states and 3334 transitions. [2021-12-17 02:50:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2021-12-17 02:50:33,125 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:50:33,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:33,131 INFO L225 Difference]: With dead ends: 2445 [2021-12-17 02:50:33,131 INFO L226 Difference]: Without dead ends: 2391 [2021-12-17 02:50:33,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27593 ImplicationChecksByTransitivity, 49.7s TimeCoverageRelationStatistics Valid=9020, Invalid=67986, Unknown=0, NotChecked=0, Total=77006 [2021-12-17 02:50:33,135 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 268 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:33,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 141 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 2531 Invalid, 0 Unknown, 138 Unchecked, 2.7s Time] [2021-12-17 02:50:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-12-17 02:50:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2112. [2021-12-17 02:50:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 1.37517764092847) internal successors, (2903), 2111 states have internal predecessors, (2903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:50:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 2903 transitions. [2021-12-17 02:50:33,486 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 2903 transitions. Word has length 30 [2021-12-17 02:50:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:33,486 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 2903 transitions. [2021-12-17 02:50:33,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:50:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 2903 transitions. [2021-12-17 02:50:33,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:50:33,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:33,487 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:33,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-17 02:50:33,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:50:33,691 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:33,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:33,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1471678670, now seen corresponding path program 23 times [2021-12-17 02:50:33,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:50:33,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502196896] [2021-12-17 02:50:33,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 02:50:33,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:50:33,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:50:33,694 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:50:33,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-17 02:50:33,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-17 02:50:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:50:33,717 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 02:50:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:50:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:35,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:50:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:38,790 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:50:38,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502196896] [2021-12-17 02:50:38,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502196896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:50:38,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:50:38,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2021-12-17 02:50:38,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354534007] [2021-12-17 02:50:38,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:50:38,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 02:50:38,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:50:38,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 02:50:38,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=2170, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 02:50:38,791 INFO L87 Difference]: Start difference. First operand 2112 states and 2903 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:50:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:50:44,789 INFO L93 Difference]: Finished difference Result 2635 states and 3604 transitions. [2021-12-17 02:50:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-17 02:50:44,789 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:50:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:50:44,792 INFO L225 Difference]: With dead ends: 2635 [2021-12-17 02:50:44,793 INFO L226 Difference]: Without dead ends: 2628 [2021-12-17 02:50:44,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=901, Invalid=6409, Unknown=0, NotChecked=0, Total=7310 [2021-12-17 02:50:44,793 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:50:44,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 85 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 83 Unchecked, 0.0s Time] [2021-12-17 02:50:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-12-17 02:50:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2368. [2021-12-17 02:50:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 1.374313476975074) internal successors, (3253), 2367 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:50:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 3253 transitions. [2021-12-17 02:50:45,176 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 3253 transitions. Word has length 30 [2021-12-17 02:50:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:50:45,176 INFO L470 AbstractCegarLoop]: Abstraction has 2368 states and 3253 transitions. [2021-12-17 02:50:45,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:50:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 3253 transitions. [2021-12-17 02:50:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:50:45,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:50:45,177 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:50:45,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-17 02:50:45,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:50:45,383 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:50:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:50:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1414420368, now seen corresponding path program 24 times [2021-12-17 02:50:45,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:50:45,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039845814] [2021-12-17 02:50:45,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 02:50:45,384 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:50:45,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:50:45,385 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:50:45,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-12-17 02:50:45,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 02:50:45,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:50:45,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-17 02:50:45,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:50:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:46,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:50:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:50:50,002 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:50:50,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039845814] [2021-12-17 02:50:50,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039845814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:50:50,003 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:50:50,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:50:50,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378404607] [2021-12-17 02:50:50,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:50:50,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:50:50,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:50:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:50:50,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=2374, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:50:50,005 INFO L87 Difference]: Start difference. First operand 2368 states and 3253 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:51:02,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:51:02,672 INFO L93 Difference]: Finished difference Result 2740 states and 3741 transitions. [2021-12-17 02:51:02,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-12-17 02:51:02,672 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:51:02,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:51:02,676 INFO L225 Difference]: With dead ends: 2740 [2021-12-17 02:51:02,676 INFO L226 Difference]: Without dead ends: 2612 [2021-12-17 02:51:02,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=2179, Invalid=10477, Unknown=0, NotChecked=0, Total=12656 [2021-12-17 02:51:02,677 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 109 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1315 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:51:02,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 97 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 324 Invalid, 0 Unknown, 1315 Unchecked, 0.2s Time] [2021-12-17 02:51:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-12-17 02:51:03,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2538. [2021-12-17 02:51:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 1.3689396925502562) internal successors, (3473), 2537 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:51:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 3473 transitions. [2021-12-17 02:51:03,131 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 3473 transitions. Word has length 30 [2021-12-17 02:51:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:51:03,131 INFO L470 AbstractCegarLoop]: Abstraction has 2538 states and 3473 transitions. [2021-12-17 02:51:03,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:51:03,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 3473 transitions. [2021-12-17 02:51:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:51:03,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:51:03,133 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:51:03,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-12-17 02:51:03,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:51:03,341 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:51:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:51:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1893571602, now seen corresponding path program 25 times [2021-12-17 02:51:03,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:51:03,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987086290] [2021-12-17 02:51:03,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-17 02:51:03,342 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:51:03,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:51:03,343 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:51:03,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-17 02:51:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:51:03,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 02:51:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:51:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:51:04,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:51:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:51:06,775 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:51:06,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987086290] [2021-12-17 02:51:06,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987086290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:51:06,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:51:06,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:51:06,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040851363] [2021-12-17 02:51:06,776 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:51:06,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:51:06,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:51:06,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:51:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:51:06,780 INFO L87 Difference]: Start difference. First operand 2538 states and 3473 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:51:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:51:31,551 INFO L93 Difference]: Finished difference Result 2791 states and 3790 transitions. [2021-12-17 02:51:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-12-17 02:51:31,552 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:51:31,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:51:31,556 INFO L225 Difference]: With dead ends: 2791 [2021-12-17 02:51:31,556 INFO L226 Difference]: Without dead ends: 2748 [2021-12-17 02:51:31,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7991 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=3396, Invalid=23664, Unknown=0, NotChecked=0, Total=27060 [2021-12-17 02:51:31,557 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 195 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 1911 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:51:31,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 166 Invalid, 2230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1911 Invalid, 0 Unknown, 104 Unchecked, 1.8s Time] [2021-12-17 02:51:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2021-12-17 02:51:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 2573. [2021-12-17 02:51:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2573 states, 2572 states have (on average 1.3685847589424571) internal successors, (3520), 2572 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:51:32,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2573 states to 2573 states and 3520 transitions. [2021-12-17 02:51:32,004 INFO L78 Accepts]: Start accepts. Automaton has 2573 states and 3520 transitions. Word has length 30 [2021-12-17 02:51:32,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:51:32,004 INFO L470 AbstractCegarLoop]: Abstraction has 2573 states and 3520 transitions. [2021-12-17 02:51:32,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:51:32,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2573 states and 3520 transitions. [2021-12-17 02:51:32,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:51:32,010 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:51:32,010 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 02:51:32,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-12-17 02:51:32,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:51:32,217 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:51:32,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:51:32,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1836313300, now seen corresponding path program 26 times [2021-12-17 02:51:32,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:51:32,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100214077] [2021-12-17 02:51:32,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 02:51:32,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:51:32,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:51:32,219 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:51:32,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-12-17 02:51:32,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 02:51:32,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:51:32,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-17 02:51:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:51:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:51:33,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:51:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:51:35,832 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:51:35,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100214077] [2021-12-17 02:51:35,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100214077] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:51:35,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:51:35,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:51:35,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003173526] [2021-12-17 02:51:35,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:51:35,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:51:35,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:51:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:51:35,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=2259, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:51:35,836 INFO L87 Difference]: Start difference. First operand 2573 states and 3520 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:52:20,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:52:20,581 INFO L93 Difference]: Finished difference Result 2983 states and 4048 transitions. [2021-12-17 02:52:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2021-12-17 02:52:20,582 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:52:20,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:52:20,585 INFO L225 Difference]: With dead ends: 2983 [2021-12-17 02:52:20,586 INFO L226 Difference]: Without dead ends: 2965 [2021-12-17 02:52:20,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18688 ImplicationChecksByTransitivity, 44.3s TimeCoverageRelationStatistics Valid=6217, Invalid=47839, Unknown=0, NotChecked=0, Total=54056 [2021-12-17 02:52:20,589 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 193 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 2233 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 2233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:52:20,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 212 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 2233 Invalid, 0 Unknown, 149 Unchecked, 2.6s Time] [2021-12-17 02:52:20,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-12-17 02:52:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2707. [2021-12-17 02:52:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2707 states, 2706 states have (on average 1.3699186991869918) internal successors, (3707), 2706 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:52:21,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2707 states to 2707 states and 3707 transitions. [2021-12-17 02:52:21,087 INFO L78 Accepts]: Start accepts. Automaton has 2707 states and 3707 transitions. Word has length 30 [2021-12-17 02:52:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:52:21,087 INFO L470 AbstractCegarLoop]: Abstraction has 2707 states and 3707 transitions. [2021-12-17 02:52:21,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:52:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2707 states and 3707 transitions. [2021-12-17 02:52:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:52:21,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:52:21,090 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 02:52:21,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-12-17 02:52:21,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:52:21,293 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:52:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:52:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1156254930, now seen corresponding path program 27 times [2021-12-17 02:52:21,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:52:21,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126664260] [2021-12-17 02:52:21,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 02:52:21,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:52:21,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:52:21,296 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:52:21,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-17 02:52:21,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-17 02:52:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:52:21,326 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-17 02:52:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:52:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:52:23,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:52:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:52:26,835 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:52:26,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126664260] [2021-12-17 02:52:26,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126664260] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:52:26,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:52:26,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:52:26,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057622980] [2021-12-17 02:52:26,836 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:52:26,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:52:26,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:52:26,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:52:26,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2434, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:52:26,837 INFO L87 Difference]: Start difference. First operand 2707 states and 3707 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:52:36,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:52:36,910 INFO L93 Difference]: Finished difference Result 2910 states and 3970 transitions. [2021-12-17 02:52:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-17 02:52:36,911 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:52:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:52:36,915 INFO L225 Difference]: With dead ends: 2910 [2021-12-17 02:52:36,915 INFO L226 Difference]: Without dead ends: 2904 [2021-12-17 02:52:36,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2963 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1298, Invalid=9622, Unknown=0, NotChecked=0, Total=10920 [2021-12-17 02:52:36,917 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:52:36,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 78 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 198 Invalid, 0 Unknown, 442 Unchecked, 0.2s Time] [2021-12-17 02:52:36,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-12-17 02:52:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2797. [2021-12-17 02:52:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 1.3726752503576538) internal successors, (3838), 2796 states have internal predecessors, (3838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:52:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 3838 transitions. [2021-12-17 02:52:37,526 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 3838 transitions. Word has length 30 [2021-12-17 02:52:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:52:37,526 INFO L470 AbstractCegarLoop]: Abstraction has 2797 states and 3838 transitions. [2021-12-17 02:52:37,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:52:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 3838 transitions. [2021-12-17 02:52:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:52:37,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:52:37,528 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-12-17 02:52:37,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-12-17 02:52:37,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:52:37,736 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:52:37,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:52:37,737 INFO L85 PathProgramCache]: Analyzing trace with hash -863366578, now seen corresponding path program 28 times [2021-12-17 02:52:37,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:52:37,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421762840] [2021-12-17 02:52:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 02:52:37,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:52:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:52:37,738 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:52:37,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-12-17 02:52:37,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 02:52:37,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:52:37,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 02:52:37,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:52:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:52:38,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:52:41,425 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:52:41,425 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:52:41,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421762840] [2021-12-17 02:52:41,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421762840] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:52:41,425 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:52:41,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2021-12-17 02:52:41,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32282592] [2021-12-17 02:52:41,425 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:52:41,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-17 02:52:41,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:52:41,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-17 02:52:41,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-12-17 02:52:41,426 INFO L87 Difference]: Start difference. First operand 2797 states and 3838 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:53:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:53:02,289 INFO L93 Difference]: Finished difference Result 3012 states and 4108 transitions. [2021-12-17 02:53:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-12-17 02:53:02,290 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:53:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:53:02,300 INFO L225 Difference]: With dead ends: 3012 [2021-12-17 02:53:02,301 INFO L226 Difference]: Without dead ends: 2986 [2021-12-17 02:53:02,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=3083, Invalid=20787, Unknown=0, NotChecked=0, Total=23870 [2021-12-17 02:53:02,302 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 235 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:53:02,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 213 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 2087 Invalid, 0 Unknown, 114 Unchecked, 2.1s Time] [2021-12-17 02:53:02,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2021-12-17 02:53:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2838. [2021-12-17 02:53:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2837 states have (on average 1.3715192104335565) internal successors, (3891), 2837 states have internal predecessors, (3891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:53:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 3891 transitions. [2021-12-17 02:53:02,762 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 3891 transitions. Word has length 30 [2021-12-17 02:53:02,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:53:02,762 INFO L470 AbstractCegarLoop]: Abstraction has 2838 states and 3891 transitions. [2021-12-17 02:53:02,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:53:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 3891 transitions. [2021-12-17 02:53:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:53:02,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:53:02,764 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 02:53:02,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-12-17 02:53:02,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:53:02,965 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:53:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:53:02,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1600683250, now seen corresponding path program 29 times [2021-12-17 02:53:02,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:53:02,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621410637] [2021-12-17 02:53:02,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 02:53:02,966 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:53:02,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:53:02,967 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:53:02,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-17 02:53:02,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-12-17 02:53:02,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:53:02,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-17 02:53:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:53:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:53:05,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:53:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:53:08,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:53:08,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621410637] [2021-12-17 02:53:08,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621410637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:53:08,683 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:53:08,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2021-12-17 02:53:08,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776709064] [2021-12-17 02:53:08,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:53:08,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-17 02:53:08,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:53:08,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-17 02:53:08,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=2174, Unknown=0, NotChecked=0, Total=2550 [2021-12-17 02:53:08,684 INFO L87 Difference]: Start difference. First operand 2838 states and 3891 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:53:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:53:23,667 INFO L93 Difference]: Finished difference Result 3344 states and 4553 transitions. [2021-12-17 02:53:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-12-17 02:53:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-17 02:53:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:53:23,689 INFO L225 Difference]: With dead ends: 3344 [2021-12-17 02:53:23,690 INFO L226 Difference]: Without dead ends: 3338 [2021-12-17 02:53:23,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=1890, Invalid=13116, Unknown=0, NotChecked=0, Total=15006 [2021-12-17 02:53:23,692 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:53:23,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 93 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 354 Invalid, 0 Unknown, 660 Unchecked, 0.5s Time] [2021-12-17 02:53:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-12-17 02:53:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3159. [2021-12-17 02:53:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 1.3689043698543382) internal successors, (4323), 3158 states have internal predecessors, (4323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:53:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 4323 transitions. [2021-12-17 02:53:24,266 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 4323 transitions. Word has length 30 [2021-12-17 02:53:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:53:24,267 INFO L470 AbstractCegarLoop]: Abstraction has 3159 states and 4323 transitions. [2021-12-17 02:53:24,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 02:53:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 4323 transitions. [2021-12-17 02:53:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 02:53:24,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:53:24,268 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-12-17 02:53:24,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-12-17 02:53:24,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 02:53:24,469 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:53:24,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:53:24,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1178790318, now seen corresponding path program 30 times [2021-12-17 02:53:24,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 02:53:24,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250179952] [2021-12-17 02:53:24,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-17 02:53:24,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 02:53:24,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 02:53:24,471 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 02:53:24,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-12-17 02:53:24,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-12-17 02:53:24,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 02:53:24,503 WARN L261 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-17 02:53:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 02:53:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:53:25,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 02:53:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:53:29,106 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 02:53:29,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250179952] [2021-12-17 02:53:29,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250179952] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 02:53:29,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 02:53:29,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-12-17 02:53:29,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897477431] [2021-12-17 02:53:29,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 02:53:29,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-17 02:53:29,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 02:53:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-17 02:53:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2434, Unknown=0, NotChecked=0, Total=2862 [2021-12-17 02:53:29,108 INFO L87 Difference]: Start difference. First operand 3159 states and 4323 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Killed by 15