./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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.4_overflow.ufo.UNBOUNDED.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 8cf9a91c8f1111f4616406dfb4a7fdeef392d21e591ff8d6357140f3015668db --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:51:13,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:51:13,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:51:13,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:51:13,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:51:13,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:51:13,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:51:13,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:51:13,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:51:13,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:51:13,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:51:13,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:51:13,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:51:13,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:51:13,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:51:13,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:51:13,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:51:13,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:51:13,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:51:13,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:51:13,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:51:13,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:51:13,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:51:13,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:51:13,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:51:13,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:51:13,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:51:13,341 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:51:13,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:51:13,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:51:13,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:51:13,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:51:13,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:51:13,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:51:13,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:51:13,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:51:13,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:51:13,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:51:13,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:51:13,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:51:13,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:51:13,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:51:13,376 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:51:13,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:51:13,377 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:51:13,377 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:51:13,378 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:51:13,378 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:51:13,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:51:13,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:51:13,379 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:51:13,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:51:13,379 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:51:13,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:51:13,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:51:13,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:51:13,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:51:13,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:51:13,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:51:13,380 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:51:13,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:51:13,381 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:51:13,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:51:13,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:51:13,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:51:13,381 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:51:13,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:51:13,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:51:13,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:51:13,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:51:13,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:51:13,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:51:13,383 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:51:13,383 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:51:13,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:51:13,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:51:13,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cf9a91c8f1111f4616406dfb4a7fdeef392d21e591ff8d6357140f3015668db [2021-12-22 11:51:13,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:51:13,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:51:13,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:51:13,605 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:51:13,619 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:51:13,620 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c [2021-12-22 11:51:13,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95411a2b9/866508b6d174428689f7abc0748c071d/FLAGf6adc93f6 [2021-12-22 11:51:14,059 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:51:14,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c [2021-12-22 11:51:14,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95411a2b9/866508b6d174428689f7abc0748c071d/FLAGf6adc93f6 [2021-12-22 11:51:14,082 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95411a2b9/866508b6d174428689f7abc0748c071d [2021-12-22 11:51:14,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:51:14,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:51:14,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:51:14,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:51:14,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:51:14,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a95fe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14, skipping insertion in model container [2021-12-22 11:51:14,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:51:14,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:51:14,326 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.4_overflow.ufo.UNBOUNDED.pals.c[8379,8392] [2021-12-22 11:51:14,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:51:14,340 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:51:14,390 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.4_overflow.ufo.UNBOUNDED.pals.c[8379,8392] [2021-12-22 11:51:14,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:51:14,402 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:51:14,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14 WrapperNode [2021-12-22 11:51:14,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:51:14,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:51:14,405 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:51:14,405 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:51:14,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,447 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 272 [2021-12-22 11:51:14,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:51:14,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:51:14,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:51:14,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:51:14,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:51:14,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:51:14,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:51:14,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:51:14,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (1/1) ... [2021-12-22 11:51:14,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:51:14,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:51:14,496 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) [2021-12-22 11:51:14,503 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 [2021-12-22 11:51:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:51:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:51:14,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:51:14,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:51:14,601 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:51:14,602 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:51:14,871 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:51:14,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:51:14,876 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:51:14,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:51:14 BoogieIcfgContainer [2021-12-22 11:51:14,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:51:14,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:51:14,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:51:14,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:51:14,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:51:14" (1/3) ... [2021-12-22 11:51:14,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b8d31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:51:14, skipping insertion in model container [2021-12-22 11:51:14,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:51:14" (2/3) ... [2021-12-22 11:51:14,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b8d31d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:51:14, skipping insertion in model container [2021-12-22 11:51:14,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:51:14" (3/3) ... [2021-12-22 11:51:14,883 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals.c [2021-12-22 11:51:14,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:51:14,887 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:51:14,915 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:51:14,921 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 [2021-12-22 11:51:14,921 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:51:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 76 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 11:51:14,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:14,939 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] [2021-12-22 11:51:14,940 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:14,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:14,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1837107710, now seen corresponding path program 1 times [2021-12-22 11:51:14,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:14,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569115618] [2021-12-22 11:51:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:14,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:15,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:15,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569115618] [2021-12-22 11:51:15,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569115618] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:15,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:15,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:51:15,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637124305] [2021-12-22 11:51:15,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:15,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:51:15,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:15,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:51:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:51:15,141 INFO L87 Difference]: Start difference. First operand has 77 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 76 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:15,165 INFO L93 Difference]: Finished difference Result 122 states and 201 transitions. [2021-12-22 11:51:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:51:15,167 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-22 11:51:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:15,174 INFO L225 Difference]: With dead ends: 122 [2021-12-22 11:51:15,174 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 11:51:15,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:51:15,182 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:15,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:15,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 11:51:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-22 11:51:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.6805555555555556) internal successors, (121), 72 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 121 transitions. [2021-12-22 11:51:15,210 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 121 transitions. Word has length 29 [2021-12-22 11:51:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:15,213 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 121 transitions. [2021-12-22 11:51:15,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 121 transitions. [2021-12-22 11:51:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 11:51:15,214 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:15,215 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] [2021-12-22 11:51:15,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:51:15,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:15,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1971121216, now seen corresponding path program 1 times [2021-12-22 11:51:15,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:15,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742393950] [2021-12-22 11:51:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:15,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:15,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:15,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742393950] [2021-12-22 11:51:15,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742393950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:15,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:15,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:51:15,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952157495] [2021-12-22 11:51:15,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:15,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:51:15,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:51:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:51:15,285 INFO L87 Difference]: Start difference. First operand 73 states and 121 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:15,345 INFO L93 Difference]: Finished difference Result 121 states and 194 transitions. [2021-12-22 11:51:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:51:15,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-22 11:51:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:15,348 INFO L225 Difference]: With dead ends: 121 [2021-12-22 11:51:15,348 INFO L226 Difference]: Without dead ends: 73 [2021-12-22 11:51:15,350 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 [2021-12-22 11:51:15,352 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 3 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:15,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 450 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-22 11:51:15,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-22 11:51:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-12-22 11:51:15,358 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 29 [2021-12-22 11:51:15,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:15,359 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-12-22 11:51:15,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-12-22 11:51:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 11:51:15,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:15,360 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, 1, 1, 1, 1] [2021-12-22 11:51:15,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:51:15,360 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:15,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:15,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1333293339, now seen corresponding path program 1 times [2021-12-22 11:51:15,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:15,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180498905] [2021-12-22 11:51:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:15,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:15,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:15,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180498905] [2021-12-22 11:51:15,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180498905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:15,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:15,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:51:15,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624977283] [2021-12-22 11:51:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:51:15,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:51:15,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:51:15,423 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:15,436 INFO L93 Difference]: Finished difference Result 155 states and 226 transitions. [2021-12-22 11:51:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:51:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-22 11:51:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:15,438 INFO L225 Difference]: With dead ends: 155 [2021-12-22 11:51:15,438 INFO L226 Difference]: Without dead ends: 111 [2021-12-22 11:51:15,438 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 [2021-12-22 11:51:15,439 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 59 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 220 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 [2021-12-22 11:51:15,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 220 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-22 11:51:15,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-12-22 11:51:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.4351851851851851) internal successors, (155), 108 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 155 transitions. [2021-12-22 11:51:15,447 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 155 transitions. Word has length 51 [2021-12-22 11:51:15,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:15,447 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 155 transitions. [2021-12-22 11:51:15,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,447 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 155 transitions. [2021-12-22 11:51:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 11:51:15,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:15,448 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, 1, 1, 1, 1] [2021-12-22 11:51:15,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:51:15,449 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash -606737519, now seen corresponding path program 1 times [2021-12-22 11:51:15,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:15,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978406153] [2021-12-22 11:51:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:15,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:15,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:15,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978406153] [2021-12-22 11:51:15,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978406153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:15,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:15,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:51:15,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640723417] [2021-12-22 11:51:15,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:15,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:51:15,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:15,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:51:15,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:51:15,509 INFO L87 Difference]: Start difference. First operand 109 states and 155 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:15,524 INFO L93 Difference]: Finished difference Result 257 states and 387 transitions. [2021-12-22 11:51:15,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:51:15,524 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-22 11:51:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:15,525 INFO L225 Difference]: With dead ends: 257 [2021-12-22 11:51:15,525 INFO L226 Difference]: Without dead ends: 177 [2021-12-22 11:51:15,526 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 [2021-12-22 11:51:15,527 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 55 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 219 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 [2021-12-22 11:51:15,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 219 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-22 11:51:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 175. [2021-12-22 11:51:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.4827586206896552) internal successors, (258), 174 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 258 transitions. [2021-12-22 11:51:15,538 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 258 transitions. Word has length 51 [2021-12-22 11:51:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:15,539 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 258 transitions. [2021-12-22 11:51:15,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 258 transitions. [2021-12-22 11:51:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 11:51:15,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:15,540 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, 1, 1, 1, 1] [2021-12-22 11:51:15,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:51:15,540 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:15,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2093945095, now seen corresponding path program 1 times [2021-12-22 11:51:15,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:15,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891808797] [2021-12-22 11:51:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:15,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:15,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891808797] [2021-12-22 11:51:15,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891808797] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:15,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:15,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:51:15,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037863211] [2021-12-22 11:51:15,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:15,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:51:15,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:51:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:51:15,585 INFO L87 Difference]: Start difference. First operand 175 states and 258 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:15,601 INFO L93 Difference]: Finished difference Result 443 states and 676 transitions. [2021-12-22 11:51:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:51:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-22 11:51:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:15,603 INFO L225 Difference]: With dead ends: 443 [2021-12-22 11:51:15,603 INFO L226 Difference]: Without dead ends: 297 [2021-12-22 11:51:15,604 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 [2021-12-22 11:51:15,604 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 51 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 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 [2021-12-22 11:51:15,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-22 11:51:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2021-12-22 11:51:15,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5034013605442176) internal successors, (442), 294 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 442 transitions. [2021-12-22 11:51:15,624 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 442 transitions. Word has length 51 [2021-12-22 11:51:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:15,624 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 442 transitions. [2021-12-22 11:51:15,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,625 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 442 transitions. [2021-12-22 11:51:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 11:51:15,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:15,626 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, 1, 1, 1, 1] [2021-12-22 11:51:15,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:51:15,626 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1863229059, now seen corresponding path program 1 times [2021-12-22 11:51:15,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:15,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850717968] [2021-12-22 11:51:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:15,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:15,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:15,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850717968] [2021-12-22 11:51:15,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850717968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:15,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:15,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:51:15,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203073292] [2021-12-22 11:51:15,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:15,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:51:15,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:51:15,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:51:15,669 INFO L87 Difference]: Start difference. First operand 295 states and 442 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:15,688 INFO L93 Difference]: Finished difference Result 779 states and 1188 transitions. [2021-12-22 11:51:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:51:15,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-22 11:51:15,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:15,691 INFO L225 Difference]: With dead ends: 779 [2021-12-22 11:51:15,691 INFO L226 Difference]: Without dead ends: 513 [2021-12-22 11:51:15,692 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 [2021-12-22 11:51:15,692 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 47 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 217 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 [2021-12-22 11:51:15,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 217 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:15,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-12-22 11:51:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 511. [2021-12-22 11:51:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 1.5019607843137255) internal successors, (766), 510 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 766 transitions. [2021-12-22 11:51:15,747 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 766 transitions. Word has length 51 [2021-12-22 11:51:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:15,748 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 766 transitions. [2021-12-22 11:51:15,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 766 transitions. [2021-12-22 11:51:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 11:51:15,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:15,750 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, 1, 1, 1, 1] [2021-12-22 11:51:15,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:51:15,750 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash -645243661, now seen corresponding path program 1 times [2021-12-22 11:51:15,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:15,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555535732] [2021-12-22 11:51:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:15,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:15,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:15,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555535732] [2021-12-22 11:51:15,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555535732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:15,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:15,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:51:15,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165029215] [2021-12-22 11:51:15,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:15,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:51:15,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:51:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:51:15,843 INFO L87 Difference]: Start difference. First operand 511 states and 766 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:16,088 INFO L93 Difference]: Finished difference Result 4367 states and 6662 transitions. [2021-12-22 11:51:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:51:16,090 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-22 11:51:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:16,103 INFO L225 Difference]: With dead ends: 4367 [2021-12-22 11:51:16,103 INFO L226 Difference]: Without dead ends: 3885 [2021-12-22 11:51:16,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:51:16,107 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 765 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:16,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 629 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:51:16,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-12-22 11:51:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 991. [2021-12-22 11:51:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.4848484848484849) internal successors, (1470), 990 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1470 transitions. [2021-12-22 11:51:16,197 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1470 transitions. Word has length 51 [2021-12-22 11:51:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:16,198 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1470 transitions. [2021-12-22 11:51:16,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1470 transitions. [2021-12-22 11:51:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 11:51:16,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:16,201 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, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:16,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:51:16,202 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:16,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1275401347, now seen corresponding path program 1 times [2021-12-22 11:51:16,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:16,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461178816] [2021-12-22 11:51:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:16,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:16,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:16,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461178816] [2021-12-22 11:51:16,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461178816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:16,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:16,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:51:16,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789970093] [2021-12-22 11:51:16,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:16,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:51:16,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:16,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:51:16,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:51:16,266 INFO L87 Difference]: Start difference. First operand 991 states and 1470 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:16,349 INFO L93 Difference]: Finished difference Result 2397 states and 3570 transitions. [2021-12-22 11:51:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:51:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-22 11:51:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:16,355 INFO L225 Difference]: With dead ends: 2397 [2021-12-22 11:51:16,355 INFO L226 Difference]: Without dead ends: 1435 [2021-12-22 11:51:16,356 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 [2021-12-22 11:51:16,357 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 39 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:16,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 184 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:16,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-12-22 11:51:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1433. [2021-12-22 11:51:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.4692737430167597) internal successors, (2104), 1432 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2104 transitions. [2021-12-22 11:51:16,425 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2104 transitions. Word has length 53 [2021-12-22 11:51:16,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:16,425 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 2104 transitions. [2021-12-22 11:51:16,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2104 transitions. [2021-12-22 11:51:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 11:51:16,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:16,426 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, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:16,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:51:16,427 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:16,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1341894859, now seen corresponding path program 1 times [2021-12-22 11:51:16,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:16,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463450717] [2021-12-22 11:51:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:16,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:16,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:16,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463450717] [2021-12-22 11:51:16,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463450717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:16,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:16,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:51:16,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234357888] [2021-12-22 11:51:16,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:16,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:51:16,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:16,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:51:16,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:51:16,541 INFO L87 Difference]: Start difference. First operand 1433 states and 2104 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:16,673 INFO L93 Difference]: Finished difference Result 2837 states and 4178 transitions. [2021-12-22 11:51:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:51:16,674 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-22 11:51:16,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:16,680 INFO L225 Difference]: With dead ends: 2837 [2021-12-22 11:51:16,680 INFO L226 Difference]: Without dead ends: 1435 [2021-12-22 11:51:16,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:51:16,682 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 194 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:16,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 290 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:16,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-12-22 11:51:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1433. [2021-12-22 11:51:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.452513966480447) internal successors, (2080), 1432 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 2080 transitions. [2021-12-22 11:51:16,740 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 2080 transitions. Word has length 53 [2021-12-22 11:51:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:16,740 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 2080 transitions. [2021-12-22 11:51:16,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 2080 transitions. [2021-12-22 11:51:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 11:51:16,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:16,741 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:16,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:51:16,741 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:16,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1765655459, now seen corresponding path program 1 times [2021-12-22 11:51:16,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:16,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289688339] [2021-12-22 11:51:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:16,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:16,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:16,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289688339] [2021-12-22 11:51:16,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289688339] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:16,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:16,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:51:16,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548931827] [2021-12-22 11:51:16,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:16,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:51:16,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:51:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:51:16,801 INFO L87 Difference]: Start difference. First operand 1433 states and 2080 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:16,991 INFO L93 Difference]: Finished difference Result 2664 states and 3817 transitions. [2021-12-22 11:51:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:51:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-22 11:51:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:16,998 INFO L225 Difference]: With dead ends: 2664 [2021-12-22 11:51:16,998 INFO L226 Difference]: Without dead ends: 2662 [2021-12-22 11:51:17,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:51:17,001 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 526 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:17,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 467 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-12-22 11:51:17,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1529. [2021-12-22 11:51:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 1.418848167539267) internal successors, (2168), 1528 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:17,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 2168 transitions. [2021-12-22 11:51:17,097 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 2168 transitions. Word has length 54 [2021-12-22 11:51:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:17,098 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 2168 transitions. [2021-12-22 11:51:17,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 2168 transitions. [2021-12-22 11:51:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 11:51:17,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:17,100 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:17,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:51:17,101 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1473223963, now seen corresponding path program 1 times [2021-12-22 11:51:17,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:17,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835920882] [2021-12-22 11:51:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:17,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 11:51:17,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:17,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835920882] [2021-12-22 11:51:17,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835920882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:17,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:17,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:51:17,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338282883] [2021-12-22 11:51:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:17,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:51:17,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:51:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:51:17,182 INFO L87 Difference]: Start difference. First operand 1529 states and 2168 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:17,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:17,520 INFO L93 Difference]: Finished difference Result 7835 states and 11137 transitions. [2021-12-22 11:51:17,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:51:17,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 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 78 [2021-12-22 11:51:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:17,535 INFO L225 Difference]: With dead ends: 7835 [2021-12-22 11:51:17,535 INFO L226 Difference]: Without dead ends: 6337 [2021-12-22 11:51:17,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:51:17,537 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 447 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:17,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 465 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2021-12-22 11:51:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 3025. [2021-12-22 11:51:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3025 states, 3024 states have (on average 1.4153439153439153) internal successors, (4280), 3024 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3025 states to 3025 states and 4280 transitions. [2021-12-22 11:51:17,746 INFO L78 Accepts]: Start accepts. Automaton has 3025 states and 4280 transitions. Word has length 78 [2021-12-22 11:51:17,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:17,746 INFO L470 AbstractCegarLoop]: Abstraction has 3025 states and 4280 transitions. [2021-12-22 11:51:17,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3025 states and 4280 transitions. [2021-12-22 11:51:17,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 11:51:17,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:17,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:17,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:51:17,748 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash -295558853, now seen corresponding path program 1 times [2021-12-22 11:51:17,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:17,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504730528] [2021-12-22 11:51:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:17,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 11:51:17,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504730528] [2021-12-22 11:51:17,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504730528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:17,797 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:17,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:51:17,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79615286] [2021-12-22 11:51:17,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:17,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:51:17,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:51:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:51:17,798 INFO L87 Difference]: Start difference. First operand 3025 states and 4280 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:18,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:18,246 INFO L93 Difference]: Finished difference Result 9331 states and 13249 transitions. [2021-12-22 11:51:18,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:51:18,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 78 [2021-12-22 11:51:18,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:18,267 INFO L225 Difference]: With dead ends: 9331 [2021-12-22 11:51:18,267 INFO L226 Difference]: Without dead ends: 7833 [2021-12-22 11:51:18,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:51:18,270 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 403 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:18,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 502 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2021-12-22 11:51:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 5273. [2021-12-22 11:51:18,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5273 states, 5272 states have (on average 1.4089529590288317) internal successors, (7428), 5272 states have internal predecessors, (7428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5273 states to 5273 states and 7428 transitions. [2021-12-22 11:51:18,628 INFO L78 Accepts]: Start accepts. Automaton has 5273 states and 7428 transitions. Word has length 78 [2021-12-22 11:51:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:18,628 INFO L470 AbstractCegarLoop]: Abstraction has 5273 states and 7428 transitions. [2021-12-22 11:51:18,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 5273 states and 7428 transitions. [2021-12-22 11:51:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 11:51:18,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:18,630 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:18,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:51:18,630 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:18,631 INFO L85 PathProgramCache]: Analyzing trace with hash 836080987, now seen corresponding path program 1 times [2021-12-22 11:51:18,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:18,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802612412] [2021-12-22 11:51:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:18,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:51:18,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802612412] [2021-12-22 11:51:18,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802612412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:18,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:18,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:51:18,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186728168] [2021-12-22 11:51:18,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:18,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:51:18,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:18,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:51:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:51:18,674 INFO L87 Difference]: Start difference. First operand 5273 states and 7428 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:19,128 INFO L93 Difference]: Finished difference Result 10827 states and 15361 transitions. [2021-12-22 11:51:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:51:19,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 78 [2021-12-22 11:51:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:19,146 INFO L225 Difference]: With dead ends: 10827 [2021-12-22 11:51:19,146 INFO L226 Difference]: Without dead ends: 9329 [2021-12-22 11:51:19,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:51:19,150 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 436 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:19,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 519 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9329 states. [2021-12-22 11:51:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9329 to 6769. [2021-12-22 11:51:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 1.4095744680851063) internal successors, (9540), 6768 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 9540 transitions. [2021-12-22 11:51:19,599 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 9540 transitions. Word has length 78 [2021-12-22 11:51:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:19,600 INFO L470 AbstractCegarLoop]: Abstraction has 6769 states and 9540 transitions. [2021-12-22 11:51:19,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 9540 transitions. [2021-12-22 11:51:19,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 11:51:19,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:19,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:19,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:51:19,602 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:19,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:19,603 INFO L85 PathProgramCache]: Analyzing trace with hash -399378053, now seen corresponding path program 1 times [2021-12-22 11:51:19,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:19,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096840156] [2021-12-22 11:51:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:19,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:51:19,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:19,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096840156] [2021-12-22 11:51:19,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096840156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:51:19,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:51:19,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:51:19,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521384118] [2021-12-22 11:51:19,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:51:19,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:51:19,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:51:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:51:19,647 INFO L87 Difference]: Start difference. First operand 6769 states and 9540 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:20,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:20,240 INFO L93 Difference]: Finished difference Result 11443 states and 16241 transitions. [2021-12-22 11:51:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:51:20,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 78 [2021-12-22 11:51:20,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:20,257 INFO L225 Difference]: With dead ends: 11443 [2021-12-22 11:51:20,258 INFO L226 Difference]: Without dead ends: 10385 [2021-12-22 11:51:20,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:51:20,262 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 435 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:20,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [435 Valid, 472 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:51:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2021-12-22 11:51:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 7825. [2021-12-22 11:51:20,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7825 states, 7824 states have (on average 1.4115541922290389) internal successors, (11044), 7824 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7825 states to 7825 states and 11044 transitions. [2021-12-22 11:51:20,698 INFO L78 Accepts]: Start accepts. Automaton has 7825 states and 11044 transitions. Word has length 78 [2021-12-22 11:51:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:20,698 INFO L470 AbstractCegarLoop]: Abstraction has 7825 states and 11044 transitions. [2021-12-22 11:51:20,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 7825 states and 11044 transitions. [2021-12-22 11:51:20,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-22 11:51:20,700 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:20,700 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:20,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:51:20,701 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:20,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash -32257762, now seen corresponding path program 1 times [2021-12-22 11:51:20,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:20,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397232490] [2021-12-22 11:51:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:20,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:20,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397232490] [2021-12-22 11:51:20,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397232490] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:51:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676993033] [2021-12-22 11:51:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:20,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:51:20,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:51:20,901 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) [2021-12-22 11:51:20,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:51:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 11:51:20,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:51:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:51:21,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:51:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:51:21,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676993033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:51:21,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:51:21,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-22 11:51:21,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068981911] [2021-12-22 11:51:21,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:51:21,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 11:51:21,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 11:51:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-22 11:51:21,519 INFO L87 Difference]: Start difference. First operand 7825 states and 11044 transitions. Second operand has 18 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:51:31,909 INFO L93 Difference]: Finished difference Result 110345 states and 155488 transitions. [2021-12-22 11:51:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-12-22 11:51:31,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 0 states have call successors, (0), 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 79 [2021-12-22 11:51:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:51:32,102 INFO L225 Difference]: With dead ends: 110345 [2021-12-22 11:51:32,102 INFO L226 Difference]: Without dead ends: 102551 [2021-12-22 11:51:32,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7154 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3144, Invalid=14148, Unknown=0, NotChecked=0, Total=17292 [2021-12-22 11:51:32,130 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 4511 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4511 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:51:32,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4511 Valid, 1919 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 11:51:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102551 states. [2021-12-22 11:51:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102551 to 51697. [2021-12-22 11:51:36,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51697 states, 51696 states have (on average 1.3852522438873414) internal successors, (71612), 51696 states have internal predecessors, (71612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51697 states to 51697 states and 71612 transitions. [2021-12-22 11:51:36,705 INFO L78 Accepts]: Start accepts. Automaton has 51697 states and 71612 transitions. Word has length 79 [2021-12-22 11:51:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:51:36,706 INFO L470 AbstractCegarLoop]: Abstraction has 51697 states and 71612 transitions. [2021-12-22 11:51:36,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.277777777777779) internal successors, (221), 18 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:51:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 51697 states and 71612 transitions. [2021-12-22 11:51:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 11:51:36,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:51:36,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:51:36,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 11:51:36,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 11:51:36,932 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:51:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:51:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1034260685, now seen corresponding path program 1 times [2021-12-22 11:51:36,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:51:36,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836841952] [2021-12-22 11:51:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:36,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:51:36,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:37,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:51:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836841952] [2021-12-22 11:51:37,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836841952] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:51:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287771094] [2021-12-22 11:51:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:51:37,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:51:37,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:51:37,046 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) [2021-12-22 11:51:37,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 11:51:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:51:37,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-22 11:51:37,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:51:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:37,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:51:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:51:38,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287771094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:51:38,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:51:38,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-22 11:51:38,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696796481] [2021-12-22 11:51:38,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:51:38,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 11:51:38,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:51:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 11:51:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-12-22 11:51:38,310 INFO L87 Difference]: Start difference. First operand 51697 states and 71612 transitions. Second operand has 26 states, 26 states have (on average 8.23076923076923) internal successors, (214), 25 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)