./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.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 dd1724e619d2e8fc18a4dc8aa6c726656a51fc7e14f993d511c4c773ed4748f3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:51:45,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:51:45,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:51:45,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:51:45,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:51:45,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:51:45,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:51:45,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:51:45,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:51:45,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:51:45,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:51:45,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:51:45,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:51:45,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:51:45,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:51:45,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:51:45,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:51:45,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:51:45,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:51:45,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:51:45,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:51:45,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:51:45,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:51:45,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:51:45,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:51:45,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:51:45,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:51:45,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:51:45,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:51:45,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:51:45,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:51:45,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:51:45,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:51:45,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:51:45,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:51:45,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:51:45,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:51:45,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:51:45,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:51:45,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:51:45,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:51:45,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:51:45,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:51:45,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:51:45,394 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:51:45,394 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:51:45,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:51:45,394 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:51:45,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:51:45,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:51:45,395 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:51:45,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:51:45,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:51:45,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:51:45,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:51:45,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:51:45,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:51:45,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:51:45,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:51:45,397 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:51:45,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:51:45,397 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:51:45,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:51:45,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:51:45,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:51:45,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:51:45,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:51:45,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:51:45,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:51:45,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:51:45,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:51:45,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:51:45,399 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:51:45,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:51:45,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:51:45,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:51:45,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dd1724e619d2e8fc18a4dc8aa6c726656a51fc7e14f993d511c4c773ed4748f3 [2021-12-17 15:51:45,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:51:45,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:51:45,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:51:45,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:51:45,617 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:51:45,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c [2021-12-17 15:51:45,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757cdaed2/efaa1c21c1414baaaea7f24d7fa66030/FLAGc05300609 [2021-12-17 15:51:46,072 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:51:46,073 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c [2021-12-17 15:51:46,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757cdaed2/efaa1c21c1414baaaea7f24d7fa66030/FLAGc05300609 [2021-12-17 15:51:46,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757cdaed2/efaa1c21c1414baaaea7f24d7fa66030 [2021-12-17 15:51:46,091 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:51:46,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:51:46,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:51:46,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:51:46,096 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:51:46,097 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55cfe8ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46, skipping insertion in model container [2021-12-17 15:51:46,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:51:46,141 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:51:46,338 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c[17005,17018] [2021-12-17 15:51:46,349 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:51:46,354 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:51:46,389 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c[17005,17018] [2021-12-17 15:51:46,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:51:46,401 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:51:46,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46 WrapperNode [2021-12-17 15:51:46,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:51:46,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:51:46,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:51:46,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:51:46,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,452 INFO L137 Inliner]: procedures = 26, calls = 17, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 460 [2021-12-17 15:51:46,459 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:51:46,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:51:46,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:51:46,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:51:46,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:51:46,511 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:51:46,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:51:46,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:51:46,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (1/1) ... [2021-12-17 15:51:46,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:51:46,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:51:46,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 15:51:46,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 15:51:46,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:51:46,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:51:46,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:51:46,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:51:46,624 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:51:46,625 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:51:47,022 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:51:47,028 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:51:47,034 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 15:51:47,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:51:47 BoogieIcfgContainer [2021-12-17 15:51:47,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:51:47,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:51:47,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:51:47,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:51:47,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:51:46" (1/3) ... [2021-12-17 15:51:47,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f760cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:51:47, skipping insertion in model container [2021-12-17 15:51:47,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:51:46" (2/3) ... [2021-12-17 15:51:47,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f760cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:51:47, skipping insertion in model container [2021-12-17 15:51:47,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:51:47" (3/3) ... [2021-12-17 15:51:47,043 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c [2021-12-17 15:51:47,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:51:47,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:51:47,085 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:51:47,090 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 15:51:47,091 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:51:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.717241379310345) internal successors, (249), 146 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 15:51:47,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:47,115 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] [2021-12-17 15:51:47,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1143199986, now seen corresponding path program 1 times [2021-12-17 15:51:47,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:47,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928309960] [2021-12-17 15:51:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:47,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:47,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:47,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928309960] [2021-12-17 15:51:47,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928309960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:47,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:47,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:51:47,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960911579] [2021-12-17 15:51:47,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:47,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:51:47,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:47,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:51:47,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:51:47,443 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.717241379310345) internal successors, (249), 146 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:47,557 INFO L93 Difference]: Finished difference Result 247 states and 411 transitions. [2021-12-17 15:51:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:51:47,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-17 15:51:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:47,570 INFO L225 Difference]: With dead ends: 247 [2021-12-17 15:51:47,571 INFO L226 Difference]: Without dead ends: 143 [2021-12-17 15:51:47,574 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 [2021-12-17 15:51:47,577 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 3 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:47,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 916 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-17 15:51:47,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-12-17 15:51:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.4154929577464788) internal successors, (201), 142 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 201 transitions. [2021-12-17 15:51:47,607 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 201 transitions. Word has length 38 [2021-12-17 15:51:47,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:47,607 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 201 transitions. [2021-12-17 15:51:47,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,608 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 201 transitions. [2021-12-17 15:51:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-17 15:51:47,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:47,610 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:47,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:51:47,610 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1334845828, now seen corresponding path program 1 times [2021-12-17 15:51:47,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:47,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588496102] [2021-12-17 15:51:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:47,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:47,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:47,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588496102] [2021-12-17 15:51:47,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588496102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:47,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:47,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:47,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406811443] [2021-12-17 15:51:47,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:47,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:47,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:47,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:47,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:47,742 INFO L87 Difference]: Start difference. First operand 143 states and 201 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:47,757 INFO L93 Difference]: Finished difference Result 323 states and 489 transitions. [2021-12-17 15:51:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:47,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 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 [2021-12-17 15:51:47,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:47,760 INFO L225 Difference]: With dead ends: 323 [2021-12-17 15:51:47,760 INFO L226 Difference]: Without dead ends: 227 [2021-12-17 15:51:47,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:47,761 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 137 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 454 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 [2021-12-17 15:51:47,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 454 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-17 15:51:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-12-17 15:51:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.4866071428571428) internal successors, (333), 224 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 333 transitions. [2021-12-17 15:51:47,773 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 333 transitions. Word has length 78 [2021-12-17 15:51:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:47,774 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 333 transitions. [2021-12-17 15:51:47,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 333 transitions. [2021-12-17 15:51:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 15:51:47,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:47,776 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:47,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:51:47,776 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1690434603, now seen corresponding path program 1 times [2021-12-17 15:51:47,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:47,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800890348] [2021-12-17 15:51:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:47,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:47,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:47,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800890348] [2021-12-17 15:51:47,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800890348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:47,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:47,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:47,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685639337] [2021-12-17 15:51:47,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:47,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:47,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:47,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:47,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:47,823 INFO L87 Difference]: Start difference. First operand 225 states and 333 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:47,845 INFO L93 Difference]: Finished difference Result 557 states and 865 transitions. [2021-12-17 15:51:47,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:47,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2021-12-17 15:51:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:47,848 INFO L225 Difference]: With dead ends: 557 [2021-12-17 15:51:47,848 INFO L226 Difference]: Without dead ends: 379 [2021-12-17 15:51:47,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:47,849 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 132 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 445 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 [2021-12-17 15:51:47,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 445 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-17 15:51:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 377. [2021-12-17 15:51:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.5319148936170213) internal successors, (576), 376 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 576 transitions. [2021-12-17 15:51:47,865 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 576 transitions. Word has length 79 [2021-12-17 15:51:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:47,866 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 576 transitions. [2021-12-17 15:51:47,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 576 transitions. [2021-12-17 15:51:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-17 15:51:47,867 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:47,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:47,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:51:47,868 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:47,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:47,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1185859852, now seen corresponding path program 1 times [2021-12-17 15:51:47,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:47,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662234434] [2021-12-17 15:51:47,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:47,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:47,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:47,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662234434] [2021-12-17 15:51:47,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662234434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:47,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:47,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:47,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589696251] [2021-12-17 15:51:47,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:47,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:47,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:47,926 INFO L87 Difference]: Start difference. First operand 377 states and 576 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:47,943 INFO L93 Difference]: Finished difference Result 989 states and 1554 transitions. [2021-12-17 15:51:47,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-17 15:51:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:47,946 INFO L225 Difference]: With dead ends: 989 [2021-12-17 15:51:47,946 INFO L226 Difference]: Without dead ends: 659 [2021-12-17 15:51:47,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:47,948 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 127 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 436 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 [2021-12-17 15:51:47,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 436 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:47,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-12-17 15:51:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 657. [2021-12-17 15:51:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 1.5548780487804879) internal successors, (1020), 656 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 1020 transitions. [2021-12-17 15:51:47,986 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 1020 transitions. Word has length 80 [2021-12-17 15:51:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:47,987 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 1020 transitions. [2021-12-17 15:51:47,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:47,988 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 1020 transitions. [2021-12-17 15:51:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-17 15:51:47,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:47,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:47,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:51:47,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:47,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:47,994 INFO L85 PathProgramCache]: Analyzing trace with hash 600169947, now seen corresponding path program 1 times [2021-12-17 15:51:47,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:47,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995734120] [2021-12-17 15:51:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:47,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:48,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:48,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995734120] [2021-12-17 15:51:48,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995734120] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:48,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:48,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:48,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160186511] [2021-12-17 15:51:48,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:48,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:48,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:48,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:48,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:48,050 INFO L87 Difference]: Start difference. First operand 657 states and 1020 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:48,085 INFO L93 Difference]: Finished difference Result 1781 states and 2806 transitions. [2021-12-17 15:51:48,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:48,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-17 15:51:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:48,091 INFO L225 Difference]: With dead ends: 1781 [2021-12-17 15:51:48,092 INFO L226 Difference]: Without dead ends: 1171 [2021-12-17 15:51:48,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:48,097 INFO L933 BasicCegarLoop]: 266 mSDtfsCounter, 122 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 427 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 [2021-12-17 15:51:48,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 427 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-12-17 15:51:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1169. [2021-12-17 15:51:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1168 states have (on average 1.5616438356164384) internal successors, (1824), 1168 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 1824 transitions. [2021-12-17 15:51:48,120 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 1824 transitions. Word has length 81 [2021-12-17 15:51:48,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:48,122 INFO L470 AbstractCegarLoop]: Abstraction has 1169 states and 1824 transitions. [2021-12-17 15:51:48,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 1824 transitions. [2021-12-17 15:51:48,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-17 15:51:48,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:48,129 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:48,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:51:48,129 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1228760164, now seen corresponding path program 1 times [2021-12-17 15:51:48,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:48,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005815778] [2021-12-17 15:51:48,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:48,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:48,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:48,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005815778] [2021-12-17 15:51:48,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005815778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:48,187 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:48,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:48,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952103662] [2021-12-17 15:51:48,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:48,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:48,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:48,188 INFO L87 Difference]: Start difference. First operand 1169 states and 1824 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:48,223 INFO L93 Difference]: Finished difference Result 3221 states and 5058 transitions. [2021-12-17 15:51:48,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:48,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-17 15:51:48,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:48,230 INFO L225 Difference]: With dead ends: 3221 [2021-12-17 15:51:48,230 INFO L226 Difference]: Without dead ends: 2099 [2021-12-17 15:51:48,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:48,235 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 117 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 418 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 [2021-12-17 15:51:48,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 418 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2099 states. [2021-12-17 15:51:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2099 to 2097. [2021-12-17 15:51:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 1.5572519083969465) internal successors, (3264), 2096 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 3264 transitions. [2021-12-17 15:51:48,279 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 3264 transitions. Word has length 82 [2021-12-17 15:51:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:48,280 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 3264 transitions. [2021-12-17 15:51:48,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,280 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 3264 transitions. [2021-12-17 15:51:48,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 15:51:48,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:48,283 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:48,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:51:48,283 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash -991115381, now seen corresponding path program 1 times [2021-12-17 15:51:48,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:48,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869512358] [2021-12-17 15:51:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:48,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:48,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:48,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:48,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869512358] [2021-12-17 15:51:48,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869512358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:48,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:48,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 15:51:48,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044235101] [2021-12-17 15:51:48,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:48,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 15:51:48,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:48,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 15:51:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:51:48,365 INFO L87 Difference]: Start difference. First operand 2097 states and 3264 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:48,648 INFO L93 Difference]: Finished difference Result 16447 states and 25783 transitions. [2021-12-17 15:51:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 15:51:48,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 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 83 [2021-12-17 15:51:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:48,691 INFO L225 Difference]: With dead ends: 16447 [2021-12-17 15:51:48,691 INFO L226 Difference]: Without dead ends: 14397 [2021-12-17 15:51:48,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-12-17 15:51:48,699 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 1801 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1801 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:48,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1801 Valid, 3241 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:51:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2021-12-17 15:51:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 4145. [2021-12-17 15:51:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 1.5482625482625483) internal successors, (6416), 4144 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 6416 transitions. [2021-12-17 15:51:48,891 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 6416 transitions. Word has length 83 [2021-12-17 15:51:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:48,891 INFO L470 AbstractCegarLoop]: Abstraction has 4145 states and 6416 transitions. [2021-12-17 15:51:48,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:48,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 6416 transitions. [2021-12-17 15:51:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 15:51:48,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:48,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:48,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:51:48,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1043128834, now seen corresponding path program 1 times [2021-12-17 15:51:48,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:48,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285649593] [2021-12-17 15:51:48,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:48,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:49,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:49,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285649593] [2021-12-17 15:51:49,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285649593] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:49,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:49,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 15:51:49,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583038297] [2021-12-17 15:51:49,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:49,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 15:51:49,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 15:51:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:51:49,039 INFO L87 Difference]: Start difference. First operand 4145 states and 6416 transitions. Second operand has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:49,585 INFO L93 Difference]: Finished difference Result 26141 states and 40150 transitions. [2021-12-17 15:51:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 15:51:49,586 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-17 15:51:49,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:49,638 INFO L225 Difference]: With dead ends: 26141 [2021-12-17 15:51:49,638 INFO L226 Difference]: Without dead ends: 22043 [2021-12-17 15:51:49,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:51:49,648 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 898 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:49,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [898 Valid, 1580 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:51:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22043 states. [2021-12-17 15:51:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22043 to 22033. [2021-12-17 15:51:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22033 states, 22032 states have (on average 1.5301379811183733) internal successors, (33712), 22032 states have internal predecessors, (33712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22033 states to 22033 states and 33712 transitions. [2021-12-17 15:51:50,287 INFO L78 Accepts]: Start accepts. Automaton has 22033 states and 33712 transitions. Word has length 84 [2021-12-17 15:51:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:50,287 INFO L470 AbstractCegarLoop]: Abstraction has 22033 states and 33712 transitions. [2021-12-17 15:51:50,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.5) internal successors, (84), 8 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 22033 states and 33712 transitions. [2021-12-17 15:51:50,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 15:51:50,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:50,288 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:50,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:51:50,289 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash -954880174, now seen corresponding path program 1 times [2021-12-17 15:51:50,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:50,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889167509] [2021-12-17 15:51:50,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:50,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:50,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:50,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889167509] [2021-12-17 15:51:50,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889167509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:50,319 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:50,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:50,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374347715] [2021-12-17 15:51:50,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:50,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:50,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:50,320 INFO L87 Difference]: Start difference. First operand 22033 states and 33712 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:51,106 INFO L93 Difference]: Finished difference Result 60821 states and 92530 transitions. [2021-12-17 15:51:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:51,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-12-17 15:51:51,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:51,175 INFO L225 Difference]: With dead ends: 60821 [2021-12-17 15:51:51,175 INFO L226 Difference]: Without dead ends: 38835 [2021-12-17 15:51:51,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:51,196 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 139 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 473 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 [2021-12-17 15:51:51,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 473 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38835 states. [2021-12-17 15:51:52,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38835 to 38833. [2021-12-17 15:51:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38833 states, 38832 states have (on average 1.5059744540585085) internal successors, (58480), 38832 states have internal predecessors, (58480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38833 states to 38833 states and 58480 transitions. [2021-12-17 15:51:52,230 INFO L78 Accepts]: Start accepts. Automaton has 38833 states and 58480 transitions. Word has length 85 [2021-12-17 15:51:52,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:52,230 INFO L470 AbstractCegarLoop]: Abstraction has 38833 states and 58480 transitions. [2021-12-17 15:51:52,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 38833 states and 58480 transitions. [2021-12-17 15:51:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 15:51:52,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:52,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:52,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:51:52,232 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:52,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1112242464, now seen corresponding path program 1 times [2021-12-17 15:51:52,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:52,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547354058] [2021-12-17 15:51:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:52,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:52,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:52,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:52,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547354058] [2021-12-17 15:51:52,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547354058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:52,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:52,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:51:52,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606640746] [2021-12-17 15:51:52,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:52,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:51:52,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:52,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:51:52,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:51:52,281 INFO L87 Difference]: Start difference. First operand 38833 states and 58480 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:53,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:53,651 INFO L93 Difference]: Finished difference Result 80691 states and 119985 transitions. [2021-12-17 15:51:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 15:51:53,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-12-17 15:51:53,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:53,765 INFO L225 Difference]: With dead ends: 80691 [2021-12-17 15:51:53,766 INFO L226 Difference]: Without dead ends: 80689 [2021-12-17 15:51:53,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:51:53,786 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 441 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:51:53,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 878 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80689 states. [2021-12-17 15:51:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80689 to 41137. [2021-12-17 15:51:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41137 states, 41136 states have (on average 1.4776351614157914) internal successors, (60784), 41136 states have internal predecessors, (60784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41137 states to 41137 states and 60784 transitions. [2021-12-17 15:51:55,385 INFO L78 Accepts]: Start accepts. Automaton has 41137 states and 60784 transitions. Word has length 85 [2021-12-17 15:51:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 41137 states and 60784 transitions. [2021-12-17 15:51:55,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 41137 states and 60784 transitions. [2021-12-17 15:51:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 15:51:55,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:55,391 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:55,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 15:51:55,391 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 172356833, now seen corresponding path program 1 times [2021-12-17 15:51:55,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:55,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496122176] [2021-12-17 15:51:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:55,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:55,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:55,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496122176] [2021-12-17 15:51:55,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496122176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:51:55,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:51:55,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:51:55,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402570723] [2021-12-17 15:51:55,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:51:55,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:51:55,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:51:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:55,427 INFO L87 Difference]: Start difference. First operand 41137 states and 60784 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:51:56,617 INFO L93 Difference]: Finished difference Result 100951 states and 149300 transitions. [2021-12-17 15:51:56,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:51:56,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-12-17 15:51:56,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:51:56,708 INFO L225 Difference]: With dead ends: 100951 [2021-12-17 15:51:56,709 INFO L226 Difference]: Without dead ends: 59861 [2021-12-17 15:51:56,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:51:56,745 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 107 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 349 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 [2021-12-17 15:51:56,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 349 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:51:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59861 states. [2021-12-17 15:51:58,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59861 to 59507. [2021-12-17 15:51:58,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59507 states, 59506 states have (on average 1.4705407858031123) internal successors, (87506), 59506 states have internal predecessors, (87506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59507 states to 59507 states and 87506 transitions. [2021-12-17 15:51:58,411 INFO L78 Accepts]: Start accepts. Automaton has 59507 states and 87506 transitions. Word has length 86 [2021-12-17 15:51:58,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:51:58,411 INFO L470 AbstractCegarLoop]: Abstraction has 59507 states and 87506 transitions. [2021-12-17 15:51:58,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:51:58,411 INFO L276 IsEmpty]: Start isEmpty. Operand 59507 states and 87506 transitions. [2021-12-17 15:51:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 15:51:58,435 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:51:58,435 INFO L514 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:51:58,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 15:51:58,435 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:51:58,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:51:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash 182856268, now seen corresponding path program 1 times [2021-12-17 15:51:58,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:51:58,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100397589] [2021-12-17 15:51:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:58,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:51:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:51:58,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:51:58,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100397589] [2021-12-17 15:51:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100397589] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 15:51:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819622975] [2021-12-17 15:51:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:51:58,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 15:51:58,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:51:58,638 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 15:51:58,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 15:51:58,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:51:58,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 15:51:58,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 15:51:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:51:59,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 15:51:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 15:51:59,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819622975] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 15:51:59,434 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 15:51:59,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-17 15:51:59,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576623529] [2021-12-17 15:51:59,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 15:51:59,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-17 15:51:59,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:51:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-17 15:51:59,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-17 15:51:59,436 INFO L87 Difference]: Start difference. First operand 59507 states and 87506 transitions. Second operand has 14 states, 14 states have (on average 24.5) internal successors, (343), 14 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:52:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:52:23,915 INFO L93 Difference]: Finished difference Result 844971 states and 1238782 transitions. [2021-12-17 15:52:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-12-17 15:52:23,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 24.5) internal successors, (343), 14 states have internal predecessors, (343), 0 states have call successors, (0), 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 119 [2021-12-17 15:52:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:52:25,331 INFO L225 Difference]: With dead ends: 844971 [2021-12-17 15:52:25,332 INFO L226 Difference]: Without dead ends: 785513 [2021-12-17 15:52:25,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3379 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1760, Invalid=6796, Unknown=0, NotChecked=0, Total=8556 [2021-12-17 15:52:25,805 INFO L933 BasicCegarLoop]: 968 mSDtfsCounter, 9232 mSDsluCounter, 4881 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9232 SdHoareTripleChecker+Valid, 5849 SdHoareTripleChecker+Invalid, 3853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 15:52:25,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9232 Valid, 5849 Invalid, 3853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 3656 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 15:52:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785513 states.