./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/count_by_nondet.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/loop-new/count_by_nondet.i -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 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:51:11,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:51:11,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:51:11,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:51:11,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:51:11,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:51:11,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:51:11,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:51:11,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:51:11,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:51:11,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:51:11,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:51:11,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:51:11,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:51:11,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:51:11,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:51:11,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:51:11,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:51:11,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:51:11,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:51:11,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:51:11,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:51:11,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:51:11,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:51:11,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:51:11,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:51:11,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:51:11,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:51:11,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:51:11,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:51:11,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:51:11,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:51:11,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:51:11,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:51:11,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:51:11,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:51:11,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:51:11,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:51:11,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:51:11,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:51:11,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:51:11,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:51:11,435 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:51:11,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:51:11,436 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:51:11,436 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:51:11,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:51:11,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:51:11,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:51:11,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:51:11,438 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:51:11,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:51:11,438 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:51:11,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:51:11,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:51:11,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:51:11,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:51:11,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:51:11,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:51:11,439 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:51:11,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:51:11,440 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:51:11,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:51:11,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:51:11,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:51:11,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:51:11,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:51:11,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:51:11,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:51:11,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:51:11,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:51:11,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:51:11,441 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:51:11,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:51:11,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:51:11,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:51:11,442 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3467a31f3cd19e731a18eaf7789079f202f3b29e437ef24ddd0458f09610424d [2021-12-14 13:51:11,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:51:11,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:51:11,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:51:11,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:51:11,681 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:51:11,682 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_nondet.i [2021-12-14 13:51:11,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec3d1a30/0b75ea7fd7c240cabe87246ff98c865a/FLAG920dc9b1e [2021-12-14 13:51:12,094 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:51:12,094 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_nondet.i [2021-12-14 13:51:12,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec3d1a30/0b75ea7fd7c240cabe87246ff98c865a/FLAG920dc9b1e [2021-12-14 13:51:12,113 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec3d1a30/0b75ea7fd7c240cabe87246ff98c865a [2021-12-14 13:51:12,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:51:12,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:51:12,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:51:12,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:51:12,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:51:12,121 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c80f1e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12, skipping insertion in model container [2021-12-14 13:51:12,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:51:12,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:51:12,265 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/loop-new/count_by_nondet.i[891,904] [2021-12-14 13:51:12,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:51:12,282 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:51:12,292 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/loop-new/count_by_nondet.i[891,904] [2021-12-14 13:51:12,295 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:51:12,305 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:51:12,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12 WrapperNode [2021-12-14 13:51:12,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:51:12,306 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:51:12,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:51:12,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:51:12,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,326 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2021-12-14 13:51:12,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:51:12,327 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:51:12,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:51:12,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:51:12,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:51:12,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:51:12,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:51:12,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:51:12,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (1/1) ... [2021-12-14 13:51:12,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:51:12,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:12,380 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) [2021-12-14 13:51:12,405 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 [2021-12-14 13:51:12,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:51:12,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:51:12,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:51:12,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:51:12,450 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:51:12,451 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:51:12,558 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:51:12,565 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:51:12,566 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 13:51:12,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:51:12 BoogieIcfgContainer [2021-12-14 13:51:12,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:51:12,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:51:12,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:51:12,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:51:12,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:51:12" (1/3) ... [2021-12-14 13:51:12,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fbb27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:51:12, skipping insertion in model container [2021-12-14 13:51:12,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:51:12" (2/3) ... [2021-12-14 13:51:12,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fbb27e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:51:12, skipping insertion in model container [2021-12-14 13:51:12,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:51:12" (3/3) ... [2021-12-14 13:51:12,573 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_nondet.i [2021-12-14 13:51:12,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:51:12,577 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:51:12,611 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:51:12,617 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 [2021-12-14 13:51:12,617 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:51:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-12-14 13:51:12,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:51:12,631 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:12,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:51:12,632 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:12,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:12,635 INFO L85 PathProgramCache]: Analyzing trace with hash 889906919, now seen corresponding path program 1 times [2021-12-14 13:51:12,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:12,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866891380] [2021-12-14 13:51:12,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:12,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:12,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:12,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:12,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866891380] [2021-12-14 13:51:12,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866891380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:51:12,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:51:12,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 13:51:12,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006865658] [2021-12-14 13:51:12,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:51:12,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 13:51:12,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:12,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 13:51:12,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:51:12,753 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-12-14 13:51:12,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:12,762 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-12-14 13:51:12,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:51:12,764 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 [2021-12-14 13:51:12,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:12,769 INFO L225 Difference]: With dead ends: 20 [2021-12-14 13:51:12,769 INFO L226 Difference]: Without dead ends: 8 [2021-12-14 13:51:12,771 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 [2021-12-14 13:51:12,774 INFO L933 BasicCegarLoop]: 13 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, 13 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 [2021-12-14 13:51:12,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:51:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-14 13:51:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-14 13:51:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2021-12-14 13:51:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-14 13:51:12,793 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-14 13:51:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:12,794 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-14 13:51:12,794 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) [2021-12-14 13:51:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-14 13:51:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-14 13:51:12,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:12,795 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-14 13:51:12,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:51:12,796 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:12,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash 889638800, now seen corresponding path program 1 times [2021-12-14 13:51:12,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:12,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700906306] [2021-12-14 13:51:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:12,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:12,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:12,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700906306] [2021-12-14 13:51:12,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700906306] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:51:12,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:51:12,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 13:51:12,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075695522] [2021-12-14 13:51:12,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:51:12,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 13:51:12,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:12,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 13:51:12,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 13:51:12,865 INFO L87 Difference]: Start difference. First operand 8 states and 8 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) [2021-12-14 13:51:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:12,877 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-12-14 13:51:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 13:51:12,878 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 [2021-12-14 13:51:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:12,878 INFO L225 Difference]: With dead ends: 14 [2021-12-14 13:51:12,878 INFO L226 Difference]: Without dead ends: 10 [2021-12-14 13:51:12,879 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 [2021-12-14 13:51:12,879 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 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 [2021-12-14 13:51:12,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:51:12,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-12-14 13:51:12,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-12-14 13:51:12,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-12-14 13:51:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-12-14 13:51:12,898 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-12-14 13:51:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:12,899 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-12-14 13:51:12,899 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) [2021-12-14 13:51:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-12-14 13:51:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-14 13:51:12,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:12,900 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:12,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 13:51:12,900 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:12,901 INFO L85 PathProgramCache]: Analyzing trace with hash 297537973, now seen corresponding path program 1 times [2021-12-14 13:51:12,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:12,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710704227] [2021-12-14 13:51:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:12,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:12,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:12,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710704227] [2021-12-14 13:51:12,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710704227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:12,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257597127] [2021-12-14 13:51:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:12,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:12,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:12,973 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) [2021-12-14 13:51:12,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:51:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:13,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-14 13:51:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:13,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:13,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257597127] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:13,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:13,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-12-14 13:51:13,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132803995] [2021-12-14 13:51:13,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:13,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 13:51:13,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:13,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 13:51:13,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:51:13,101 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-14 13:51:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:13,112 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-12-14 13:51:13,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 13:51:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) Word has length 8 [2021-12-14 13:51:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:13,113 INFO L225 Difference]: With dead ends: 15 [2021-12-14 13:51:13,113 INFO L226 Difference]: Without dead ends: 11 [2021-12-14 13:51:13,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-14 13:51:13,114 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:13,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 14 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:51:13,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-14 13:51:13,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-14 13:51:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 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) [2021-12-14 13:51:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-12-14 13:51:13,117 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-12-14 13:51:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:13,117 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-12-14 13:51:13,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2021-12-14 13:51:13,118 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-12-14 13:51:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 13:51:13,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:13,118 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:13,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:13,337 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 [2021-12-14 13:51:13,337 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1775673702, now seen corresponding path program 2 times [2021-12-14 13:51:13,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:13,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942485251] [2021-12-14 13:51:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:13,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:13,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:13,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942485251] [2021-12-14 13:51:13,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942485251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:13,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537660000] [2021-12-14 13:51:13,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:51:13,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:13,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:13,409 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) [2021-12-14 13:51:13,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:51:13,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:51:13,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 13:51:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:13,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:13,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537660000] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:13,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:13,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-14 13:51:13,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862200706] [2021-12-14 13:51:13,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:13,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-14 13:51:13,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-14 13:51:13,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-12-14 13:51:13,573 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2021-12-14 13:51:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:13,623 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-12-14 13:51:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 13:51:13,623 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 10 [2021-12-14 13:51:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:13,624 INFO L225 Difference]: With dead ends: 30 [2021-12-14 13:51:13,624 INFO L226 Difference]: Without dead ends: 20 [2021-12-14 13:51:13,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-14 13:51:13,626 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:13,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:51:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-14 13:51:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-12-14 13:51:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 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) [2021-12-14 13:51:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-12-14 13:51:13,629 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2021-12-14 13:51:13,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:13,629 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-12-14 13:51:13,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2021-12-14 13:51:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-12-14 13:51:13,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-14 13:51:13,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:13,630 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:13,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:13,846 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 [2021-12-14 13:51:13,847 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:13,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1714864722, now seen corresponding path program 3 times [2021-12-14 13:51:13,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:13,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077767590] [2021-12-14 13:51:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:13,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:13,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:13,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077767590] [2021-12-14 13:51:13,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077767590] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:13,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520512842] [2021-12-14 13:51:13,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 13:51:13,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:13,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:13,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:13,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:51:14,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-14 13:51:14,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:14,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-14 13:51:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:14,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:14,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520512842] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:14,243 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:14,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2021-12-14 13:51:14,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721445139] [2021-12-14 13:51:14,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:14,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-14 13:51:14,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-14 13:51:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-12-14 13:51:14,247 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-12-14 13:51:14,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:14,373 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-12-14 13:51:14,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 13:51:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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 [2021-12-14 13:51:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:14,374 INFO L225 Difference]: With dead ends: 54 [2021-12-14 13:51:14,375 INFO L226 Difference]: Without dead ends: 36 [2021-12-14 13:51:14,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-12-14 13:51:14,376 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:14,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 41 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:51:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-12-14 13:51:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-12-14 13:51:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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) [2021-12-14 13:51:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-12-14 13:51:14,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 18 [2021-12-14 13:51:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:14,381 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-12-14 13:51:14,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 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) [2021-12-14 13:51:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-12-14 13:51:14,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-14 13:51:14,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:14,382 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:14,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:14,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:14,599 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:14,599 INFO L85 PathProgramCache]: Analyzing trace with hash -340131882, now seen corresponding path program 4 times [2021-12-14 13:51:14,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:14,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036188085] [2021-12-14 13:51:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:14,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:14,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:14,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036188085] [2021-12-14 13:51:14,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036188085] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:14,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586829770] [2021-12-14 13:51:14,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 13:51:14,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:14,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:14,818 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:14,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:51:14,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 13:51:14,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:14,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-14 13:51:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:14,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:15,311 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:15,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586829770] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:15,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:15,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2021-12-14 13:51:15,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445201986] [2021-12-14 13:51:15,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:15,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 13:51:15,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:15,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 13:51:15,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2021-12-14 13:51:15,313 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 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) [2021-12-14 13:51:15,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:15,569 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-12-14 13:51:15,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-14 13:51:15,569 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 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 34 [2021-12-14 13:51:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:15,570 INFO L225 Difference]: With dead ends: 102 [2021-12-14 13:51:15,570 INFO L226 Difference]: Without dead ends: 68 [2021-12-14 13:51:15,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1697, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 13:51:15,572 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:15,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 77 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:51:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-14 13:51:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-12-14 13:51:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 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) [2021-12-14 13:51:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-12-14 13:51:15,578 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 34 [2021-12-14 13:51:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:15,578 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-12-14 13:51:15,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 35 states have internal predecessors, (70), 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) [2021-12-14 13:51:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-12-14 13:51:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 13:51:15,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:15,580 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:15,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:15,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:15,797 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:15,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:15,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1787794470, now seen corresponding path program 5 times [2021-12-14 13:51:15,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:15,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112886765] [2021-12-14 13:51:15,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:15,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:16,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112886765] [2021-12-14 13:51:16,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112886765] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:16,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719367528] [2021-12-14 13:51:16,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 13:51:16,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:16,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:16,255 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:16,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:51:16,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-12-14 13:51:16,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:16,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-14 13:51:16,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:16,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:17,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719367528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:17,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:17,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2021-12-14 13:51:17,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495618044] [2021-12-14 13:51:17,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:17,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-12-14 13:51:17,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:17,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-12-14 13:51:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2021-12-14 13:51:17,544 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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) [2021-12-14 13:51:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:18,220 INFO L93 Difference]: Finished difference Result 198 states and 229 transitions. [2021-12-14 13:51:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-14 13:51:18,221 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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 66 [2021-12-14 13:51:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:18,222 INFO L225 Difference]: With dead ends: 198 [2021-12-14 13:51:18,222 INFO L226 Difference]: Without dead ends: 132 [2021-12-14 13:51:18,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3237, Invalid=6465, Unknown=0, NotChecked=0, Total=9702 [2021-12-14 13:51:18,225 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 323 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:18,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 123 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:51:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-14 13:51:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-12-14 13:51:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 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) [2021-12-14 13:51:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-12-14 13:51:18,238 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 66 [2021-12-14 13:51:18,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:18,240 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-12-14 13:51:18,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 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) [2021-12-14 13:51:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-12-14 13:51:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-14 13:51:18,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:18,244 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:18,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-14 13:51:18,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:18,467 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1249182522, now seen corresponding path program 6 times [2021-12-14 13:51:18,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:18,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066749120] [2021-12-14 13:51:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:18,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:19,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:19,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066749120] [2021-12-14 13:51:19,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066749120] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:19,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611821723] [2021-12-14 13:51:19,899 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-14 13:51:19,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:19,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:19,900 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:19,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 13:51:20,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2021-12-14 13:51:20,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:51:20,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-14 13:51:20,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:20,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:22,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611821723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:22,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:22,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2021-12-14 13:51:22,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960650386] [2021-12-14 13:51:22,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:22,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-12-14 13:51:22,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-12-14 13:51:22,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8261, Invalid=8769, Unknown=0, NotChecked=0, Total=17030 [2021-12-14 13:51:22,981 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 131 states, 131 states have (on average 2.0) internal successors, (262), 131 states have internal predecessors, (262), 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) [2021-12-14 13:51:24,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:24,816 INFO L93 Difference]: Finished difference Result 390 states and 453 transitions. [2021-12-14 13:51:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-14 13:51:24,817 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 131 states have internal predecessors, (262), 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 130 [2021-12-14 13:51:24,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:24,818 INFO L225 Difference]: With dead ends: 390 [2021-12-14 13:51:24,818 INFO L226 Difference]: Without dead ends: 260 [2021-12-14 13:51:24,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4472 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12613, Invalid=25217, Unknown=0, NotChecked=0, Total=37830 [2021-12-14 13:51:24,829 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 623 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:24,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 225 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:51:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-14 13:51:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-12-14 13:51:24,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 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) [2021-12-14 13:51:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-12-14 13:51:24,853 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 130 [2021-12-14 13:51:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:24,854 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-12-14 13:51:24,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 131 states have internal predecessors, (262), 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) [2021-12-14 13:51:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-12-14 13:51:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-14 13:51:24,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:24,861 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:24,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:25,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:25,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:25,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:25,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1933390330, now seen corresponding path program 7 times [2021-12-14 13:51:25,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:25,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842871377] [2021-12-14 13:51:25,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:25,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:29,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:29,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:51:29,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842871377] [2021-12-14 13:51:29,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842871377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:51:29,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423831071] [2021-12-14 13:51:29,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-14 13:51:29,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:29,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:51:29,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:51:29,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 13:51:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:51:29,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 1419 conjuncts, 130 conjunts are in the unsatisfiable core [2021-12-14 13:51:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:51:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:30,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:51:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:51:43,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423831071] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:51:43,539 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:51:43,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 259 [2021-12-14 13:51:43,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943220451] [2021-12-14 13:51:43,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:51:43,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 259 states [2021-12-14 13:51:43,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:51:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 259 interpolants. [2021-12-14 13:51:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32901, Invalid=33921, Unknown=0, NotChecked=0, Total=66822 [2021-12-14 13:51:43,573 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 259 states, 259 states have (on average 2.0) internal successors, (518), 259 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) [2021-12-14 13:51:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:51:51,746 INFO L93 Difference]: Finished difference Result 774 states and 901 transitions. [2021-12-14 13:51:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-12-14 13:51:51,751 INFO L78 Accepts]: Start accepts. Automaton has has 259 states, 259 states have (on average 2.0) internal successors, (518), 259 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) Word has length 258 [2021-12-14 13:51:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:51:51,754 INFO L225 Difference]: With dead ends: 774 [2021-12-14 13:51:51,755 INFO L226 Difference]: Without dead ends: 516 [2021-12-14 13:51:51,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 386 SyntacticMatches, 1 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17144 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=49797, Invalid=99585, Unknown=0, NotChecked=0, Total=149382 [2021-12-14 13:51:51,767 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1242 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:51:51,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1242 Valid, 414 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 13:51:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-14 13:51:51,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 515. [2021-12-14 13:51:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 1.0019455252918288) internal successors, (515), 514 states have internal predecessors, (515), 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) [2021-12-14 13:51:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 515 transitions. [2021-12-14 13:51:51,795 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 515 transitions. Word has length 258 [2021-12-14 13:51:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:51:51,796 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 515 transitions. [2021-12-14 13:51:51,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 259 states, 259 states have (on average 2.0) internal successors, (518), 259 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) [2021-12-14 13:51:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 515 transitions. [2021-12-14 13:51:51,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2021-12-14 13:51:51,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:51:51,802 INFO L514 BasicCegarLoop]: trace histogram [254, 254, 1, 1, 1, 1, 1, 1] [2021-12-14 13:51:51,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 13:51:52,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:51:52,020 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:51:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:51:52,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1607044986, now seen corresponding path program 8 times [2021-12-14 13:51:52,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:51:52,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256990300] [2021-12-14 13:51:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:51:52,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:51:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:52:05,286 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:52:05,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:52:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256990300] [2021-12-14 13:52:05,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256990300] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:52:05,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738722630] [2021-12-14 13:52:05,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:52:05,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:52:05,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:52:05,288 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:52:05,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 13:52:05,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:52:05,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:52:05,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 258 conjunts are in the unsatisfiable core [2021-12-14 13:52:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:52:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 64516 backedges. 0 proven. 64516 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:52:06,393 INFO L328 TraceCheckSpWp]: Computing backward predicates...