./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 76982ccfa15d5420010caf48ff31900a394710bc42d46403e291e5b0b2cbfb5b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:09:22,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:09:22,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:09:22,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:09:22,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:09:22,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:09:22,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:09:22,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:09:22,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:09:22,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:09:22,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:09:22,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:09:22,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:09:22,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:09:22,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:09:22,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:09:22,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:09:22,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:09:22,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:09:22,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:09:22,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:09:22,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:09:22,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:09:22,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:09:22,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:09:22,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:09:22,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:09:22,338 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:09:22,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:09:22,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:09:22,340 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:09:22,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:09:22,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:09:22,342 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:09:22,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:09:22,343 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:09:22,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:09:22,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:09:22,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:09:22,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:09:22,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:09:22,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:09:22,373 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:09:22,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:09:22,374 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:09:22,374 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:09:22,375 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:09:22,375 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:09:22,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:09:22,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:09:22,376 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:09:22,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:09:22,377 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:09:22,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:09:22,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:09:22,377 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:09:22,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:09:22,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:09:22,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:09:22,378 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:09:22,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:09:22,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:09:22,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:09:22,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:09:22,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:09:22,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:09:22,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:22,379 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:09:22,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:09:22,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:09:22,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:09:22,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:09:22,379 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:09:22,380 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:09:22,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:09:22,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76982ccfa15d5420010caf48ff31900a394710bc42d46403e291e5b0b2cbfb5b [2021-12-28 01:09:22,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:09:22,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:09:22,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:09:22,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:09:22,672 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:09:22,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2021-12-28 01:09:22,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba9c640d/4b37dedcbe554b31a46e5ab6806d81b5/FLAGf12f9fb13 [2021-12-28 01:09:23,060 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:09:23,061 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2021-12-28 01:09:23,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba9c640d/4b37dedcbe554b31a46e5ab6806d81b5/FLAGf12f9fb13 [2021-12-28 01:09:23,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bba9c640d/4b37dedcbe554b31a46e5ab6806d81b5 [2021-12-28 01:09:23,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:09:23,076 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:09:23,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:23,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:09:23,079 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:09:23,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e7919bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23, skipping insertion in model container [2021-12-28 01:09:23,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:09:23,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:09:23,261 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/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c[6803,6816] [2021-12-28 01:09:23,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:23,272 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:09:23,339 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/seq-mthreaded/pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c[6803,6816] [2021-12-28 01:09:23,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:09:23,350 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:09:23,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23 WrapperNode [2021-12-28 01:09:23,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:09:23,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:23,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:09:23,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:09:23,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,400 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 252 [2021-12-28 01:09:23,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:09:23,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:09:23,402 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:09:23,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:09:23,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:09:23,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:09:23,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:09:23,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:09:23,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (1/1) ... [2021-12-28 01:09:23,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:09:23,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:23,469 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) [2021-12-28 01:09:23,487 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 [2021-12-28 01:09:23,498 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:09:23,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:09:23,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:09:23,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:09:23,577 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:09:23,578 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:09:23,880 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:09:23,885 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:09:23,886 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:09:23,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:23 BoogieIcfgContainer [2021-12-28 01:09:23,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:09:23,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:09:23,889 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:09:23,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:09:23,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:09:23" (1/3) ... [2021-12-28 01:09:23,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d45a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:23, skipping insertion in model container [2021-12-28 01:09:23,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:09:23" (2/3) ... [2021-12-28 01:09:23,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d45a54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:09:23, skipping insertion in model container [2021-12-28 01:09:23,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:09:23" (3/3) ... [2021-12-28 01:09:23,893 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.BOUNDED-6.pals.c [2021-12-28 01:09:23,897 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:09:23,897 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:09:23,933 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:09:23,939 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 [2021-12-28 01:09:23,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:09:23,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 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) [2021-12-28 01:09:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 01:09:23,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:23,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:23,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:23,970 INFO L85 PathProgramCache]: Analyzing trace with hash 233700331, now seen corresponding path program 1 times [2021-12-28 01:09:23,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978072688] [2021-12-28 01:09:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:23,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:24,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:24,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978072688] [2021-12-28 01:09:24,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978072688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:24,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:24,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:24,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543918344] [2021-12-28 01:09:24,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:24,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:24,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:24,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:24,208 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-12-28 01:09:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:24,317 INFO L93 Difference]: Finished difference Result 191 states and 307 transitions. [2021-12-28 01:09:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:24,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 25 [2021-12-28 01:09:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:24,326 INFO L225 Difference]: With dead ends: 191 [2021-12-28 01:09:24,329 INFO L226 Difference]: Without dead ends: 127 [2021-12-28 01:09:24,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:24,334 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 84 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:24,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 465 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-28 01:09:24,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 75. [2021-12-28 01:09:24,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 74 states have internal predecessors, (105), 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) [2021-12-28 01:09:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2021-12-28 01:09:24,362 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 25 [2021-12-28 01:09:24,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:24,362 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2021-12-28 01:09:24,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-12-28 01:09:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2021-12-28 01:09:24,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 01:09:24,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:24,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:24,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:09:24,366 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:24,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:24,368 INFO L85 PathProgramCache]: Analyzing trace with hash 182027041, now seen corresponding path program 1 times [2021-12-28 01:09:24,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:24,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724179088] [2021-12-28 01:09:24,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:24,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:24,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:24,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724179088] [2021-12-28 01:09:24,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724179088] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:24,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:24,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:24,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299677149] [2021-12-28 01:09:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:24,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:24,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:24,453 INFO L87 Difference]: Start difference. First operand 75 states and 105 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-12-28 01:09:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:24,468 INFO L93 Difference]: Finished difference Result 167 states and 249 transitions. [2021-12-28 01:09:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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 41 [2021-12-28 01:09:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:24,469 INFO L225 Difference]: With dead ends: 167 [2021-12-28 01:09:24,469 INFO L226 Difference]: Without dead ends: 115 [2021-12-28 01:09:24,469 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 [2021-12-28 01:09:24,470 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:24,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-28 01:09:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-12-28 01:09:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 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) [2021-12-28 01:09:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2021-12-28 01:09:24,478 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 165 transitions. Word has length 41 [2021-12-28 01:09:24,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:24,478 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 165 transitions. [2021-12-28 01:09:24,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 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) [2021-12-28 01:09:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 165 transitions. [2021-12-28 01:09:24,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-28 01:09:24,479 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:24,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:24,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:09:24,480 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:24,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:24,480 INFO L85 PathProgramCache]: Analyzing trace with hash 54990345, now seen corresponding path program 1 times [2021-12-28 01:09:24,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:24,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729609592] [2021-12-28 01:09:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:24,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:24,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:24,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729609592] [2021-12-28 01:09:24,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729609592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:24,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:24,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:24,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097719059] [2021-12-28 01:09:24,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:24,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:24,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:24,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:24,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:24,524 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-12-28 01:09:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:24,538 INFO L93 Difference]: Finished difference Result 269 states and 409 transitions. [2021-12-28 01:09:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2021-12-28 01:09:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:24,540 INFO L225 Difference]: With dead ends: 269 [2021-12-28 01:09:24,540 INFO L226 Difference]: Without dead ends: 179 [2021-12-28 01:09:24,540 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 [2021-12-28 01:09:24,541 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 65 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:24,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:24,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-28 01:09:24,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-12-28 01:09:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5) internal successors, (264), 176 states have internal predecessors, (264), 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) [2021-12-28 01:09:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 264 transitions. [2021-12-28 01:09:24,553 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 264 transitions. Word has length 42 [2021-12-28 01:09:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:24,553 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 264 transitions. [2021-12-28 01:09:24,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-12-28 01:09:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 264 transitions. [2021-12-28 01:09:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-28 01:09:24,554 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:24,554 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:24,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:09:24,554 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1508061361, now seen corresponding path program 1 times [2021-12-28 01:09:24,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:24,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910896695] [2021-12-28 01:09:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:24,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:24,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:24,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:24,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910896695] [2021-12-28 01:09:24,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910896695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:24,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:24,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:24,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455624867] [2021-12-28 01:09:24,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:24,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:24,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:24,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:24,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:24,595 INFO L87 Difference]: Start difference. First operand 177 states and 264 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:24,612 INFO L93 Difference]: Finished difference Result 437 states and 666 transitions. [2021-12-28 01:09:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:24,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-28 01:09:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:24,614 INFO L225 Difference]: With dead ends: 437 [2021-12-28 01:09:24,614 INFO L226 Difference]: Without dead ends: 283 [2021-12-28 01:09:24,615 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 [2021-12-28 01:09:24,616 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 60 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:24,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-12-28 01:09:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2021-12-28 01:09:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.5) internal successors, (420), 280 states have internal predecessors, (420), 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) [2021-12-28 01:09:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 420 transitions. [2021-12-28 01:09:24,632 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 420 transitions. Word has length 43 [2021-12-28 01:09:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:24,633 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 420 transitions. [2021-12-28 01:09:24,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:09:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 420 transitions. [2021-12-28 01:09:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 01:09:24,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:24,634 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:24,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:09:24,634 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash -922713191, now seen corresponding path program 1 times [2021-12-28 01:09:24,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:24,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021174397] [2021-12-28 01:09:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:24,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:24,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:24,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021174397] [2021-12-28 01:09:24,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021174397] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:24,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:24,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:24,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432656999] [2021-12-28 01:09:24,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:24,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:24,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:24,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:24,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:24,687 INFO L87 Difference]: Start difference. First operand 281 states and 420 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2021-12-28 01:09:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:24,757 INFO L93 Difference]: Finished difference Result 1313 states and 2008 transitions. [2021-12-28 01:09:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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 44 [2021-12-28 01:09:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:24,762 INFO L225 Difference]: With dead ends: 1313 [2021-12-28 01:09:24,762 INFO L226 Difference]: Without dead ends: 1055 [2021-12-28 01:09:24,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:24,765 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 412 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:24,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 551 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:24,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-12-28 01:09:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 537. [2021-12-28 01:09:24,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.492537313432836) internal successors, (800), 536 states have internal predecessors, (800), 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) [2021-12-28 01:09:24,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 800 transitions. [2021-12-28 01:09:24,797 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 800 transitions. Word has length 44 [2021-12-28 01:09:24,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:24,798 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 800 transitions. [2021-12-28 01:09:24,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 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) [2021-12-28 01:09:24,798 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 800 transitions. [2021-12-28 01:09:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 01:09:24,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:24,799 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:24,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:09:24,800 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:24,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:24,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1077338731, now seen corresponding path program 1 times [2021-12-28 01:09:24,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:24,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684962378] [2021-12-28 01:09:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:24,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:24,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:24,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684962378] [2021-12-28 01:09:24,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684962378] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:24,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:24,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:24,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239475560] [2021-12-28 01:09:24,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:24,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:24,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:24,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:24,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:24,863 INFO L87 Difference]: Start difference. First operand 537 states and 800 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-12-28 01:09:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:24,956 INFO L93 Difference]: Finished difference Result 1911 states and 2843 transitions. [2021-12-28 01:09:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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 45 [2021-12-28 01:09:24,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:24,961 INFO L225 Difference]: With dead ends: 1911 [2021-12-28 01:09:24,961 INFO L226 Difference]: Without dead ends: 1397 [2021-12-28 01:09:24,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:24,967 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 209 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:24,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 294 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-12-28 01:09:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1393. [2021-12-28 01:09:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.471264367816092) internal successors, (2048), 1392 states have internal predecessors, (2048), 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) [2021-12-28 01:09:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2048 transitions. [2021-12-28 01:09:25,042 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2048 transitions. Word has length 45 [2021-12-28 01:09:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:25,042 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 2048 transitions. [2021-12-28 01:09:25,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 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) [2021-12-28 01:09:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2048 transitions. [2021-12-28 01:09:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 01:09:25,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:25,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:25,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:09:25,046 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:25,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:25,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1270898830, now seen corresponding path program 1 times [2021-12-28 01:09:25,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:25,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058127905] [2021-12-28 01:09:25,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:25,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:25,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:25,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058127905] [2021-12-28 01:09:25,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058127905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:25,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:25,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:25,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270757518] [2021-12-28 01:09:25,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:25,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:25,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:25,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:25,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:25,124 INFO L87 Difference]: Start difference. First operand 1393 states and 2048 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2021-12-28 01:09:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:25,296 INFO L93 Difference]: Finished difference Result 2955 states and 4265 transitions. [2021-12-28 01:09:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:09:25,297 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 46 [2021-12-28 01:09:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:25,306 INFO L225 Difference]: With dead ends: 2955 [2021-12-28 01:09:25,306 INFO L226 Difference]: Without dead ends: 2953 [2021-12-28 01:09:25,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:09:25,310 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:25,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 455 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-12-28 01:09:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1537. [2021-12-28 01:09:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.4270833333333333) internal successors, (2192), 1536 states have internal predecessors, (2192), 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) [2021-12-28 01:09:25,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2192 transitions. [2021-12-28 01:09:25,402 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2192 transitions. Word has length 46 [2021-12-28 01:09:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:25,405 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 2192 transitions. [2021-12-28 01:09:25,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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) [2021-12-28 01:09:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2192 transitions. [2021-12-28 01:09:25,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-28 01:09:25,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:25,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:25,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:09:25,406 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash 795736558, now seen corresponding path program 1 times [2021-12-28 01:09:25,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:25,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140098549] [2021-12-28 01:09:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:25,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:25,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:25,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140098549] [2021-12-28 01:09:25,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140098549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:25,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:25,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:25,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209762979] [2021-12-28 01:09:25,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:25,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:25,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:25,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:25,461 INFO L87 Difference]: Start difference. First operand 1537 states and 2192 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-12-28 01:09:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:25,574 INFO L93 Difference]: Finished difference Result 3651 states and 5220 transitions. [2021-12-28 01:09:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:25,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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 47 [2021-12-28 01:09:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:25,581 INFO L225 Difference]: With dead ends: 3651 [2021-12-28 01:09:25,581 INFO L226 Difference]: Without dead ends: 2137 [2021-12-28 01:09:25,582 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 [2021-12-28 01:09:25,583 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 51 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:25,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 205 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:25,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-12-28 01:09:25,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2135. [2021-12-28 01:09:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 1.4198687910028116) internal successors, (3030), 2134 states have internal predecessors, (3030), 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) [2021-12-28 01:09:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3030 transitions. [2021-12-28 01:09:25,681 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3030 transitions. Word has length 47 [2021-12-28 01:09:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:25,684 INFO L470 AbstractCegarLoop]: Abstraction has 2135 states and 3030 transitions. [2021-12-28 01:09:25,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 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) [2021-12-28 01:09:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3030 transitions. [2021-12-28 01:09:25,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 01:09:25,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:25,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:25,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:09:25,688 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1282796535, now seen corresponding path program 1 times [2021-12-28 01:09:25,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:25,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483550716] [2021-12-28 01:09:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:25,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:25,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:25,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483550716] [2021-12-28 01:09:25,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483550716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:25,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179490893] [2021-12-28 01:09:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:25,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:25,806 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) [2021-12-28 01:09:25,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 01:09:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:25,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-28 01:09:25,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:26,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:26,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179490893] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:26,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:26,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2021-12-28 01:09:26,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299037211] [2021-12-28 01:09:26,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:26,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 01:09:26,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:26,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 01:09:26,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-28 01:09:26,330 INFO L87 Difference]: Start difference. First operand 2135 states and 3030 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 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) [2021-12-28 01:09:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:26,590 INFO L93 Difference]: Finished difference Result 6595 states and 9454 transitions. [2021-12-28 01:09:26,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:09:26,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 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 [2021-12-28 01:09:26,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:26,602 INFO L225 Difference]: With dead ends: 6595 [2021-12-28 01:09:26,602 INFO L226 Difference]: Without dead ends: 5081 [2021-12-28 01:09:26,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:09:26,604 INFO L933 BasicCegarLoop]: 209 mSDtfsCounter, 413 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:26,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:26,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2021-12-28 01:09:26,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4831. [2021-12-28 01:09:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4140786749482401) internal successors, (6830), 4830 states have internal predecessors, (6830), 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) [2021-12-28 01:09:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 6830 transitions. [2021-12-28 01:09:26,841 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 6830 transitions. Word has length 66 [2021-12-28 01:09:26,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:26,842 INFO L470 AbstractCegarLoop]: Abstraction has 4831 states and 6830 transitions. [2021-12-28 01:09:26,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 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) [2021-12-28 01:09:26,842 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 6830 transitions. [2021-12-28 01:09:26,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 01:09:26,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:26,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:26,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 01:09:27,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:27,061 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:27,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:27,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1183086589, now seen corresponding path program 1 times [2021-12-28 01:09:27,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:27,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890593084] [2021-12-28 01:09:27,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:27,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:27,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:27,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:27,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890593084] [2021-12-28 01:09:27,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890593084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:27,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:27,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:27,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550346063] [2021-12-28 01:09:27,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:27,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:27,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:27,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:27,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:27,092 INFO L87 Difference]: Start difference. First operand 4831 states and 6830 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) [2021-12-28 01:09:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:27,443 INFO L93 Difference]: Finished difference Result 11235 states and 15832 transitions. [2021-12-28 01:09:27,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:27,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) Word has length 67 [2021-12-28 01:09:27,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:27,462 INFO L225 Difference]: With dead ends: 11235 [2021-12-28 01:09:27,463 INFO L226 Difference]: Without dead ends: 7825 [2021-12-28 01:09:27,466 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 [2021-12-28 01:09:27,467 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 49 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:27,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 199 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2021-12-28 01:09:27,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7823. [2021-12-28 01:09:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7823 states, 7822 states have (on average 1.3891587829199694) internal successors, (10866), 7822 states have internal predecessors, (10866), 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) [2021-12-28 01:09:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 10866 transitions. [2021-12-28 01:09:27,842 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 10866 transitions. Word has length 67 [2021-12-28 01:09:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:27,842 INFO L470 AbstractCegarLoop]: Abstraction has 7823 states and 10866 transitions. [2021-12-28 01:09:27,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) [2021-12-28 01:09:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 10866 transitions. [2021-12-28 01:09:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 01:09:27,844 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:27,844 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:27,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:09:27,845 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:27,845 INFO L85 PathProgramCache]: Analyzing trace with hash -297371507, now seen corresponding path program 1 times [2021-12-28 01:09:27,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:27,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664733384] [2021-12-28 01:09:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:27,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:27,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 01:09:27,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:27,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664733384] [2021-12-28 01:09:27,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664733384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:27,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:27,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:27,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756922377] [2021-12-28 01:09:27,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:27,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:27,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:27,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:27,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:27,908 INFO L87 Difference]: Start difference. First operand 7823 states and 10866 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-12-28 01:09:28,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:28,383 INFO L93 Difference]: Finished difference Result 15327 states and 21392 transitions. [2021-12-28 01:09:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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 67 [2021-12-28 01:09:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:28,411 INFO L225 Difference]: With dead ends: 15327 [2021-12-28 01:09:28,412 INFO L226 Difference]: Without dead ends: 11957 [2021-12-28 01:09:28,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:28,432 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 279 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:28,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 486 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11957 states. [2021-12-28 01:09:29,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11957 to 10593. [2021-12-28 01:09:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 10592 states have (on average 1.3834969788519638) internal successors, (14654), 10592 states have internal predecessors, (14654), 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) [2021-12-28 01:09:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 14654 transitions. [2021-12-28 01:09:29,063 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 14654 transitions. Word has length 67 [2021-12-28 01:09:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:29,064 INFO L470 AbstractCegarLoop]: Abstraction has 10593 states and 14654 transitions. [2021-12-28 01:09:29,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2021-12-28 01:09:29,064 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 14654 transitions. [2021-12-28 01:09:29,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 01:09:29,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:29,071 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:29,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:09:29,071 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash 129974557, now seen corresponding path program 1 times [2021-12-28 01:09:29,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:29,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757056729] [2021-12-28 01:09:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:29,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:29,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:29,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757056729] [2021-12-28 01:09:29,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757056729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:29,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:29,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:29,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563772226] [2021-12-28 01:09:29,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:29,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:29,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:29,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:29,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:29,109 INFO L87 Difference]: Start difference. First operand 10593 states and 14654 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) [2021-12-28 01:09:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:29,534 INFO L93 Difference]: Finished difference Result 18149 states and 24986 transitions. [2021-12-28 01:09:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:29,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) Word has length 67 [2021-12-28 01:09:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:29,551 INFO L225 Difference]: With dead ends: 18149 [2021-12-28 01:09:29,552 INFO L226 Difference]: Without dead ends: 11113 [2021-12-28 01:09:29,559 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 [2021-12-28 01:09:29,560 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:29,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 231 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:29,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2021-12-28 01:09:29,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 10664. [2021-12-28 01:09:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10664 states, 10663 states have (on average 1.3522460845915782) internal successors, (14419), 10663 states have internal predecessors, (14419), 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) [2021-12-28 01:09:30,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10664 states to 10664 states and 14419 transitions. [2021-12-28 01:09:30,027 INFO L78 Accepts]: Start accepts. Automaton has 10664 states and 14419 transitions. Word has length 67 [2021-12-28 01:09:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:30,027 INFO L470 AbstractCegarLoop]: Abstraction has 10664 states and 14419 transitions. [2021-12-28 01:09:30,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 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) [2021-12-28 01:09:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 10664 states and 14419 transitions. [2021-12-28 01:09:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 01:09:30,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:30,033 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:30,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:09:30,033 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:30,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:30,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1562240835, now seen corresponding path program 1 times [2021-12-28 01:09:30,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:30,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914799151] [2021-12-28 01:09:30,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:30,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-28 01:09:30,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:30,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914799151] [2021-12-28 01:09:30,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914799151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:30,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:30,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:30,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981751482] [2021-12-28 01:09:30,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:30,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:30,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:30,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:30,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:30,077 INFO L87 Difference]: Start difference. First operand 10664 states and 14419 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-12-28 01:09:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:30,612 INFO L93 Difference]: Finished difference Result 15411 states and 21048 transitions. [2021-12-28 01:09:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 67 [2021-12-28 01:09:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:30,633 INFO L225 Difference]: With dead ends: 15411 [2021-12-28 01:09:30,633 INFO L226 Difference]: Without dead ends: 13669 [2021-12-28 01:09:30,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:30,638 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 286 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:30,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 482 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:30,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13669 states. [2021-12-28 01:09:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13669 to 12284. [2021-12-28 01:09:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12284 states, 12283 states have (on average 1.3543108361149556) internal successors, (16635), 12283 states have internal predecessors, (16635), 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) [2021-12-28 01:09:31,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12284 states to 12284 states and 16635 transitions. [2021-12-28 01:09:31,172 INFO L78 Accepts]: Start accepts. Automaton has 12284 states and 16635 transitions. Word has length 67 [2021-12-28 01:09:31,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:31,173 INFO L470 AbstractCegarLoop]: Abstraction has 12284 states and 16635 transitions. [2021-12-28 01:09:31,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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) [2021-12-28 01:09:31,173 INFO L276 IsEmpty]: Start isEmpty. Operand 12284 states and 16635 transitions. [2021-12-28 01:09:31,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 01:09:31,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:31,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:31,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:09:31,176 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -2062316443, now seen corresponding path program 1 times [2021-12-28 01:09:31,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:31,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948352248] [2021-12-28 01:09:31,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:31,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 01:09:31,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:31,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948352248] [2021-12-28 01:09:31,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948352248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:31,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:31,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:31,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152458412] [2021-12-28 01:09:31,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:31,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:09:31,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:31,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:09:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:09:31,209 INFO L87 Difference]: Start difference. First operand 12284 states and 16635 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2021-12-28 01:09:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:31,781 INFO L93 Difference]: Finished difference Result 19196 states and 26179 transitions. [2021-12-28 01:09:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:09:31,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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 67 [2021-12-28 01:09:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:31,801 INFO L225 Difference]: With dead ends: 19196 [2021-12-28 01:09:31,802 INFO L226 Difference]: Without dead ends: 16092 [2021-12-28 01:09:31,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:09:31,807 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 281 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:31,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:09:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2021-12-28 01:09:32,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 14696. [2021-12-28 01:09:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14696 states, 14695 states have (on average 1.350187138482477) internal successors, (19841), 14695 states have internal predecessors, (19841), 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) [2021-12-28 01:09:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14696 states to 14696 states and 19841 transitions. [2021-12-28 01:09:32,452 INFO L78 Accepts]: Start accepts. Automaton has 14696 states and 19841 transitions. Word has length 67 [2021-12-28 01:09:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:32,452 INFO L470 AbstractCegarLoop]: Abstraction has 14696 states and 19841 transitions. [2021-12-28 01:09:32,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 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) [2021-12-28 01:09:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 14696 states and 19841 transitions. [2021-12-28 01:09:32,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-28 01:09:32,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:32,455 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:32,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:09:32,456 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash -762122981, now seen corresponding path program 1 times [2021-12-28 01:09:32,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617397372] [2021-12-28 01:09:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:32,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:32,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:32,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617397372] [2021-12-28 01:09:32,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617397372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:32,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:32,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:09:32,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386504283] [2021-12-28 01:09:32,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:32,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:09:32,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:09:32,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:09:32,480 INFO L87 Difference]: Start difference. First operand 14696 states and 19841 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2021-12-28 01:09:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:33,221 INFO L93 Difference]: Finished difference Result 35614 states and 47892 transitions. [2021-12-28 01:09:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:09:33,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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 70 [2021-12-28 01:09:33,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:33,255 INFO L225 Difference]: With dead ends: 35614 [2021-12-28 01:09:33,256 INFO L226 Difference]: Without dead ends: 21860 [2021-12-28 01:09:33,274 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 [2021-12-28 01:09:33,275 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 50 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:33,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 246 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:33,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21860 states. [2021-12-28 01:09:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21860 to 21198. [2021-12-28 01:09:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21198 states, 21197 states have (on average 1.3274519979242345) internal successors, (28138), 21197 states have internal predecessors, (28138), 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) [2021-12-28 01:09:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21198 states to 21198 states and 28138 transitions. [2021-12-28 01:09:34,386 INFO L78 Accepts]: Start accepts. Automaton has 21198 states and 28138 transitions. Word has length 70 [2021-12-28 01:09:34,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:34,387 INFO L470 AbstractCegarLoop]: Abstraction has 21198 states and 28138 transitions. [2021-12-28 01:09:34,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 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) [2021-12-28 01:09:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 21198 states and 28138 transitions. [2021-12-28 01:09:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 01:09:34,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:34,391 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:34,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:09:34,391 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:34,392 INFO L85 PathProgramCache]: Analyzing trace with hash -624325544, now seen corresponding path program 1 times [2021-12-28 01:09:34,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:34,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784488932] [2021-12-28 01:09:34,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:34,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:34,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:34,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784488932] [2021-12-28 01:09:34,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784488932] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:34,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558410833] [2021-12-28 01:09:34,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:34,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:34,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:34,437 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) [2021-12-28 01:09:34,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 01:09:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:09:34,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:34,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:34,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558410833] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:34,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:34,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-28 01:09:34,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400220410] [2021-12-28 01:09:34,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:34,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 01:09:34,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:34,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 01:09:34,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:09:34,816 INFO L87 Difference]: Start difference. First operand 21198 states and 28138 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 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) [2021-12-28 01:09:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:37,275 INFO L93 Difference]: Finished difference Result 64966 states and 86142 transitions. [2021-12-28 01:09:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 01:09:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 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 71 [2021-12-28 01:09:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:37,341 INFO L225 Difference]: With dead ends: 64966 [2021-12-28 01:09:37,341 INFO L226 Difference]: Without dead ends: 47852 [2021-12-28 01:09:37,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-28 01:09:37,370 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1393 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:37,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1393 Valid, 369 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47852 states. [2021-12-28 01:09:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47852 to 24863. [2021-12-28 01:09:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24863 states, 24862 states have (on average 1.3303837181240448) internal successors, (33076), 24862 states have internal predecessors, (33076), 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) [2021-12-28 01:09:38,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24863 states to 24863 states and 33076 transitions. [2021-12-28 01:09:38,819 INFO L78 Accepts]: Start accepts. Automaton has 24863 states and 33076 transitions. Word has length 71 [2021-12-28 01:09:38,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:38,819 INFO L470 AbstractCegarLoop]: Abstraction has 24863 states and 33076 transitions. [2021-12-28 01:09:38,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 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) [2021-12-28 01:09:38,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24863 states and 33076 transitions. [2021-12-28 01:09:38,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 01:09:38,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:38,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:38,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 01:09:39,039 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,SelfDestructingSolverStorable15 [2021-12-28 01:09:39,040 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:39,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2058940762, now seen corresponding path program 1 times [2021-12-28 01:09:39,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:39,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345988776] [2021-12-28 01:09:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:39,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:39,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 01:09:39,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:39,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345988776] [2021-12-28 01:09:39,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345988776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:09:39,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:09:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:09:39,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955465321] [2021-12-28 01:09:39,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:09:39,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:09:39,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:09:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:09:39,075 INFO L87 Difference]: Start difference. First operand 24863 states and 33076 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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) [2021-12-28 01:09:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:40,885 INFO L93 Difference]: Finished difference Result 61430 states and 81709 transitions. [2021-12-28 01:09:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:09:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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 71 [2021-12-28 01:09:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:40,929 INFO L225 Difference]: With dead ends: 61430 [2021-12-28 01:09:40,930 INFO L226 Difference]: Without dead ends: 36606 [2021-12-28 01:09:40,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:09:40,951 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 519 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:40,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 200 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:41,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36606 states. [2021-12-28 01:09:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36606 to 33398. [2021-12-28 01:09:42,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33398 states, 33397 states have (on average 1.3117046441297122) internal successors, (43807), 33397 states have internal predecessors, (43807), 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) [2021-12-28 01:09:43,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33398 states to 33398 states and 43807 transitions. [2021-12-28 01:09:43,046 INFO L78 Accepts]: Start accepts. Automaton has 33398 states and 43807 transitions. Word has length 71 [2021-12-28 01:09:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:43,046 INFO L470 AbstractCegarLoop]: Abstraction has 33398 states and 43807 transitions. [2021-12-28 01:09:43,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 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) [2021-12-28 01:09:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 33398 states and 43807 transitions. [2021-12-28 01:09:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 01:09:43,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:43,051 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:43,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:09:43,051 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1342540196, now seen corresponding path program 1 times [2021-12-28 01:09:43,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:43,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112600841] [2021-12-28 01:09:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:43,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112600841] [2021-12-28 01:09:43,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112600841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:43,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696716337] [2021-12-28 01:09:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:43,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:43,092 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) [2021-12-28 01:09:43,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 01:09:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:09:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:43,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696716337] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:43,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:43,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-28 01:09:43,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334373727] [2021-12-28 01:09:43,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:43,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 01:09:43,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:43,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 01:09:43,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:09:43,440 INFO L87 Difference]: Start difference. First operand 33398 states and 43807 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 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) [2021-12-28 01:09:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:46,424 INFO L93 Difference]: Finished difference Result 72462 states and 94424 transitions. [2021-12-28 01:09:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 01:09:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 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 71 [2021-12-28 01:09:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:46,481 INFO L225 Difference]: With dead ends: 72462 [2021-12-28 01:09:46,482 INFO L226 Difference]: Without dead ends: 45957 [2021-12-28 01:09:46,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-28 01:09:46,511 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 852 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:46,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 351 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45957 states. [2021-12-28 01:09:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45957 to 33893. [2021-12-28 01:09:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33893 states, 33892 states have (on average 1.3054113065030095) internal successors, (44243), 33892 states have internal predecessors, (44243), 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) [2021-12-28 01:09:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33893 states to 33893 states and 44243 transitions. [2021-12-28 01:09:48,845 INFO L78 Accepts]: Start accepts. Automaton has 33893 states and 44243 transitions. Word has length 71 [2021-12-28 01:09:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:48,845 INFO L470 AbstractCegarLoop]: Abstraction has 33893 states and 44243 transitions. [2021-12-28 01:09:48,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 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) [2021-12-28 01:09:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 33893 states and 44243 transitions. [2021-12-28 01:09:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-28 01:09:48,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:48,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:48,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 01:09:49,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 01:09:49,066 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:49,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:49,067 INFO L85 PathProgramCache]: Analyzing trace with hash -85511602, now seen corresponding path program 1 times [2021-12-28 01:09:49,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:49,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315990156] [2021-12-28 01:09:49,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:49,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:49,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:49,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315990156] [2021-12-28 01:09:49,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315990156] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:49,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319815692] [2021-12-28 01:09:49,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:49,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:49,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:49,120 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) [2021-12-28 01:09:49,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 01:09:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:49,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 01:09:49,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:49,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:49,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319815692] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:49,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:49,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-28 01:09:49,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853827709] [2021-12-28 01:09:49,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:49,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 01:09:49,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 01:09:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:09:49,517 INFO L87 Difference]: Start difference. First operand 33893 states and 44243 transitions. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 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) [2021-12-28 01:09:53,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:09:53,691 INFO L93 Difference]: Finished difference Result 89058 states and 116006 transitions. [2021-12-28 01:09:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 01:09:53,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 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 71 [2021-12-28 01:09:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:09:53,783 INFO L225 Difference]: With dead ends: 89058 [2021-12-28 01:09:53,784 INFO L226 Difference]: Without dead ends: 66760 [2021-12-28 01:09:53,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-28 01:09:53,815 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 777 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:09:53,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 410 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:09:53,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66760 states. [2021-12-28 01:09:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66760 to 39289. [2021-12-28 01:09:56,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39289 states, 39288 states have (on average 1.3065058032987171) internal successors, (51330), 39288 states have internal predecessors, (51330), 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) [2021-12-28 01:09:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39289 states to 39289 states and 51330 transitions. [2021-12-28 01:09:56,623 INFO L78 Accepts]: Start accepts. Automaton has 39289 states and 51330 transitions. Word has length 71 [2021-12-28 01:09:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:09:56,623 INFO L470 AbstractCegarLoop]: Abstraction has 39289 states and 51330 transitions. [2021-12-28 01:09:56,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 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) [2021-12-28 01:09:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 39289 states and 51330 transitions. [2021-12-28 01:09:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 01:09:56,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:09:56,628 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:09:56,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-28 01:09:56,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:56,845 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:09:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:09:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash 2029316117, now seen corresponding path program 1 times [2021-12-28 01:09:56,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:09:56,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781999019] [2021-12-28 01:09:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:56,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:09:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:56,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:09:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781999019] [2021-12-28 01:09:56,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781999019] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 01:09:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448460889] [2021-12-28 01:09:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:09:56,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 01:09:56,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:09:56,996 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) [2021-12-28 01:09:57,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 01:09:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:09:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 01:09:57,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 01:09:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:58,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 01:09:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:09:59,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448460889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 01:09:59,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 01:09:59,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 30 [2021-12-28 01:09:59,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841306163] [2021-12-28 01:09:59,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 01:09:59,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-28 01:09:59,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:09:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-28 01:09:59,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-12-28 01:09:59,052 INFO L87 Difference]: Start difference. First operand 39289 states and 51330 transitions. Second operand has 30 states, 30 states have (on average 6.333333333333333) internal successors, (190), 30 states have internal predecessors, (190), 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)