./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.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 a2c5c77b8d7714bea640ff99a5b0e1a19cf307340ccbaffec9b7e0efde04f6ec --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:01:45,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:01:45,272 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:01:45,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:01:45,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:01:45,317 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:01:45,319 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:01:45,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:01:45,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:01:45,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:01:45,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:01:45,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:01:45,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:01:45,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:01:45,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:01:45,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:01:45,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:01:45,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:01:45,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:01:45,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:01:45,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:01:45,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:01:45,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:01:45,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:01:45,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:01:45,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:01:45,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:01:45,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:01:45,337 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:01:45,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:01:45,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:01:45,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:01:45,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:01:45,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:01:45,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:01:45,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:01:45,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:01:45,344 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:01:45,344 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:01:45,345 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:01:45,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:01:45,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:01:45,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:01:45,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:01:45,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:01:45,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:01:45,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:01:45,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:01:45,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:01:45,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:01:45,365 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:01:45,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:01:45,365 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:01:45,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:01:45,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:01:45,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:01:45,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:01:45,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:01:45,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:01:45,366 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:01:45,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:01:45,367 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:01:45,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:01:45,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:01:45,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:01:45,367 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:01:45,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:01:45,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:01:45,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:01:45,368 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:01:45,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:01:45,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:01:45,368 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:01:45,368 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:01:45,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:01:45,369 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:01:45,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2c5c77b8d7714bea640ff99a5b0e1a19cf307340ccbaffec9b7e0efde04f6ec [2021-12-14 15:01:45,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:01:45,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:01:45,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:01:45,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:01:45,556 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:01:45,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-14 15:01:45,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f075c71/8719b0e3fa424f41b33adf77040bf9db/FLAG9fa09e6b9 [2021-12-14 15:01:46,025 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:01:46,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-14 15:01:46,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f075c71/8719b0e3fa424f41b33adf77040bf9db/FLAG9fa09e6b9 [2021-12-14 15:01:46,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39f075c71/8719b0e3fa424f41b33adf77040bf9db [2021-12-14 15:01:46,057 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:01:46,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:01:46,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:01:46,059 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:01:46,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:01:46,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,064 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c869cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46, skipping insertion in model container [2021-12-14 15:01:46,064 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:01:46,102 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:01:46,257 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_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c[12951,12964] [2021-12-14 15:01:46,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:01:46,272 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:01:46,307 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_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c[12951,12964] [2021-12-14 15:01:46,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:01:46,317 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:01:46,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46 WrapperNode [2021-12-14 15:01:46,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:01:46,319 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:01:46,319 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:01:46,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:01:46,323 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,378 INFO L137 Inliner]: procedures = 23, calls = 14, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 467 [2021-12-14 15:01:46,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:01:46,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:01:46,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:01:46,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:01:46,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,416 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:01:46,417 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:01:46,417 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:01:46,417 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:01:46,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (1/1) ... [2021-12-14 15:01:46,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:01:46,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:01:46,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 15:01:46,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 15:01:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:01:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:01:46,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:01:46,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:01:46,544 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:01:46,546 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:01:46,945 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:01:46,953 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:01:46,954 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 15:01:46,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:01:46 BoogieIcfgContainer [2021-12-14 15:01:46,955 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:01:46,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:01:46,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:01:46,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:01:46,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:01:46" (1/3) ... [2021-12-14 15:01:46,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f9a1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:01:46, skipping insertion in model container [2021-12-14 15:01:46,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:01:46" (2/3) ... [2021-12-14 15:01:46,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42f9a1b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:01:46, skipping insertion in model container [2021-12-14 15:01:46,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:01:46" (3/3) ... [2021-12-14 15:01:46,971 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c [2021-12-14 15:01:46,974 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:01:46,975 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 15:01:47,016 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:01:47,022 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 15:01:47,022 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 15:01:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7375886524822695) internal successors, (245), 142 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 15:01:47,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:47,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:01:47,046 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:47,050 INFO L85 PathProgramCache]: Analyzing trace with hash 126688108, now seen corresponding path program 1 times [2021-12-14 15:01:47,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:47,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438984432] [2021-12-14 15:01:47,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:47,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:47,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:47,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438984432] [2021-12-14 15:01:47,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438984432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:47,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:47,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 15:01:47,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869207550] [2021-12-14 15:01:47,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:47,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 15:01:47,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 15:01:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 15:01:47,267 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7375886524822695) internal successors, (245), 142 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:47,287 INFO L93 Difference]: Finished difference Result 229 states and 391 transitions. [2021-12-14 15:01:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 15:01:47,289 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-14 15:01:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:47,298 INFO L225 Difference]: With dead ends: 229 [2021-12-14 15:01:47,298 INFO L226 Difference]: Without dead ends: 139 [2021-12-14 15:01:47,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 15:01:47,304 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:47,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:47,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-14 15:01:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-14 15:01:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.7246376811594204) internal successors, (238), 138 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 238 transitions. [2021-12-14 15:01:47,338 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 238 transitions. Word has length 37 [2021-12-14 15:01:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:47,339 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 238 transitions. [2021-12-14 15:01:47,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 238 transitions. [2021-12-14 15:01:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 15:01:47,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:47,341 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] [2021-12-14 15:01:47,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:01:47,342 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:47,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:47,342 INFO L85 PathProgramCache]: Analyzing trace with hash -690960342, now seen corresponding path program 1 times [2021-12-14 15:01:47,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:47,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598545069] [2021-12-14 15:01:47,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:47,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:47,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:47,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598545069] [2021-12-14 15:01:47,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598545069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:47,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:47,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:01:47,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281783428] [2021-12-14 15:01:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:47,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:01:47,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:01:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:47,436 INFO L87 Difference]: Start difference. First operand 139 states and 238 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:47,506 INFO L93 Difference]: Finished difference Result 228 states and 384 transitions. [2021-12-14 15:01:47,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:01:47,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 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 37 [2021-12-14 15:01:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:47,512 INFO L225 Difference]: With dead ends: 228 [2021-12-14 15:01:47,512 INFO L226 Difference]: Without dead ends: 139 [2021-12-14 15:01:47,513 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 [2021-12-14 15:01:47,514 INFO L933 BasicCegarLoop]: 236 mSDtfsCounter, 3 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:47,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 917 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-12-14 15:01:47,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-12-14 15:01:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.5507246376811594) internal successors, (214), 138 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 214 transitions. [2021-12-14 15:01:47,542 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 214 transitions. Word has length 37 [2021-12-14 15:01:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:47,542 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 214 transitions. [2021-12-14 15:01:47,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 214 transitions. [2021-12-14 15:01:47,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 15:01:47,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:47,546 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] [2021-12-14 15:01:47,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:01:47,547 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash 747585835, now seen corresponding path program 1 times [2021-12-14 15:01:47,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:47,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322555824] [2021-12-14 15:01:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:47,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:47,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:47,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322555824] [2021-12-14 15:01:47,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322555824] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:47,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:47,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:01:47,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105617044] [2021-12-14 15:01:47,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:47,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:01:47,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:01:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:47,623 INFO L87 Difference]: Start difference. First operand 139 states and 214 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:47,671 INFO L93 Difference]: Finished difference Result 299 states and 480 transitions. [2021-12-14 15:01:47,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:01:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-12-14 15:01:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:47,674 INFO L225 Difference]: With dead ends: 299 [2021-12-14 15:01:47,676 INFO L226 Difference]: Without dead ends: 214 [2021-12-14 15:01:47,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:47,678 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 115 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:47,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 382 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-14 15:01:47,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2021-12-14 15:01:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.5714285714285714) internal successors, (330), 210 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 330 transitions. [2021-12-14 15:01:47,699 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 330 transitions. Word has length 60 [2021-12-14 15:01:47,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:47,700 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 330 transitions. [2021-12-14 15:01:47,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,700 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 330 transitions. [2021-12-14 15:01:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-14 15:01:47,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:47,705 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] [2021-12-14 15:01:47,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:01:47,706 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:47,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:47,706 INFO L85 PathProgramCache]: Analyzing trace with hash -53855584, now seen corresponding path program 1 times [2021-12-14 15:01:47,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:47,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077744966] [2021-12-14 15:01:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:47,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:47,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077744966] [2021-12-14 15:01:47,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077744966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:47,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:47,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:01:47,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141155700] [2021-12-14 15:01:47,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:47,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:01:47,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:47,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:01:47,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:47,795 INFO L87 Difference]: Start difference. First operand 211 states and 330 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:47,814 INFO L93 Difference]: Finished difference Result 509 states and 818 transitions. [2021-12-14 15:01:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:01:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-14 15:01:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:47,815 INFO L225 Difference]: With dead ends: 509 [2021-12-14 15:01:47,816 INFO L226 Difference]: Without dead ends: 352 [2021-12-14 15:01:47,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:47,817 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 117 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:47,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 395 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:47,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-14 15:01:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2021-12-14 15:01:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.5936599423631124) internal successors, (553), 347 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 553 transitions. [2021-12-14 15:01:47,831 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 553 transitions. Word has length 62 [2021-12-14 15:01:47,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:47,832 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 553 transitions. [2021-12-14 15:01:47,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 553 transitions. [2021-12-14 15:01:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-14 15:01:47,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:47,833 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] [2021-12-14 15:01:47,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:01:47,833 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash -730458987, now seen corresponding path program 1 times [2021-12-14 15:01:47,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:47,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620666077] [2021-12-14 15:01:47,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:47,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:47,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:47,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620666077] [2021-12-14 15:01:47,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620666077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:47,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:47,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:01:47,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944976724] [2021-12-14 15:01:47,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:47,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:01:47,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:47,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:01:47,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:47,902 INFO L87 Difference]: Start difference. First operand 348 states and 553 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:47,931 INFO L93 Difference]: Finished difference Result 904 states and 1459 transitions. [2021-12-14 15:01:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:01:47,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-14 15:01:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:47,935 INFO L225 Difference]: With dead ends: 904 [2021-12-14 15:01:47,936 INFO L226 Difference]: Without dead ends: 610 [2021-12-14 15:01:47,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:47,939 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 111 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:47,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 396 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-14 15:01:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 604. [2021-12-14 15:01:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.6003316749585406) internal successors, (965), 603 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 965 transitions. [2021-12-14 15:01:47,976 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 965 transitions. Word has length 64 [2021-12-14 15:01:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:47,977 INFO L470 AbstractCegarLoop]: Abstraction has 604 states and 965 transitions. [2021-12-14 15:01:47,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 965 transitions. [2021-12-14 15:01:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 15:01:47,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:47,982 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] [2021-12-14 15:01:47,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:01:47,983 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:47,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1382576374, now seen corresponding path program 1 times [2021-12-14 15:01:47,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:47,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003605263] [2021-12-14 15:01:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:47,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:48,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:48,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003605263] [2021-12-14 15:01:48,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003605263] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:48,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:48,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:01:48,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838375686] [2021-12-14 15:01:48,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:48,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:01:48,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:48,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:01:48,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:48,075 INFO L87 Difference]: Start difference. First operand 604 states and 965 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:48,213 INFO L93 Difference]: Finished difference Result 2616 states and 4275 transitions. [2021-12-14 15:01:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:01:48,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-14 15:01:48,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:48,222 INFO L225 Difference]: With dead ends: 2616 [2021-12-14 15:01:48,223 INFO L226 Difference]: Without dead ends: 2066 [2021-12-14 15:01:48,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:01:48,225 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 936 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:48,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 1264 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 15:01:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2021-12-14 15:01:48,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1086. [2021-12-14 15:01:48,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 1.6110599078341015) internal successors, (1748), 1085 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 1748 transitions. [2021-12-14 15:01:48,261 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 1748 transitions. Word has length 66 [2021-12-14 15:01:48,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:48,262 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 1748 transitions. [2021-12-14 15:01:48,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 1748 transitions. [2021-12-14 15:01:48,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-14 15:01:48,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:48,264 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] [2021-12-14 15:01:48,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:01:48,265 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1833027237, now seen corresponding path program 1 times [2021-12-14 15:01:48,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:48,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71051074] [2021-12-14 15:01:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:48,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:48,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71051074] [2021-12-14 15:01:48,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71051074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:48,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:48,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:01:48,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052971150] [2021-12-14 15:01:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:48,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:01:48,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:01:48,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:01:48,331 INFO L87 Difference]: Start difference. First operand 1086 states and 1748 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:48,406 INFO L93 Difference]: Finished difference Result 3176 states and 5180 transitions. [2021-12-14 15:01:48,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:01:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-14 15:01:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:48,414 INFO L225 Difference]: With dead ends: 3176 [2021-12-14 15:01:48,415 INFO L226 Difference]: Without dead ends: 2144 [2021-12-14 15:01:48,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:48,417 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 411 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:48,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 707 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:48,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-12-14 15:01:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1606. [2021-12-14 15:01:48,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1605 states have (on average 1.618068535825545) internal successors, (2597), 1605 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2597 transitions. [2021-12-14 15:01:48,465 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2597 transitions. Word has length 67 [2021-12-14 15:01:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:48,466 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2597 transitions. [2021-12-14 15:01:48,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2597 transitions. [2021-12-14 15:01:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 15:01:48,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:48,467 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] [2021-12-14 15:01:48,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:01:48,468 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:48,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:48,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1551869537, now seen corresponding path program 1 times [2021-12-14 15:01:48,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:48,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954720175] [2021-12-14 15:01:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:48,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:48,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:48,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:48,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954720175] [2021-12-14 15:01:48,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954720175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:48,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:48,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:01:48,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812057281] [2021-12-14 15:01:48,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:48,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:01:48,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:48,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:01:48,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:01:48,523 INFO L87 Difference]: Start difference. First operand 1606 states and 2597 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:48,610 INFO L93 Difference]: Finished difference Result 4670 states and 7604 transitions. [2021-12-14 15:01:48,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:01:48,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-14 15:01:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:48,619 INFO L225 Difference]: With dead ends: 4670 [2021-12-14 15:01:48,619 INFO L226 Difference]: Without dead ends: 3118 [2021-12-14 15:01:48,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:48,623 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 411 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:48,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [411 Valid, 706 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2021-12-14 15:01:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 2350. [2021-12-14 15:01:48,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 1.6164325244785014) internal successors, (3797), 2349 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3797 transitions. [2021-12-14 15:01:48,696 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3797 transitions. Word has length 68 [2021-12-14 15:01:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:48,697 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 3797 transitions. [2021-12-14 15:01:48,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3797 transitions. [2021-12-14 15:01:48,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-14 15:01:48,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:48,698 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] [2021-12-14 15:01:48,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:01:48,699 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:48,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:48,700 INFO L85 PathProgramCache]: Analyzing trace with hash -721508526, now seen corresponding path program 1 times [2021-12-14 15:01:48,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:48,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812692026] [2021-12-14 15:01:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:48,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:48,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:48,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812692026] [2021-12-14 15:01:48,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812692026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:48,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:48,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:01:48,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342959147] [2021-12-14 15:01:48,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:48,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:01:48,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:01:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:01:48,744 INFO L87 Difference]: Start difference. First operand 2350 states and 3797 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:48,836 INFO L93 Difference]: Finished difference Result 6790 states and 11032 transitions. [2021-12-14 15:01:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:01:48,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 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 69 [2021-12-14 15:01:48,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:48,848 INFO L225 Difference]: With dead ends: 6790 [2021-12-14 15:01:48,848 INFO L226 Difference]: Without dead ends: 4494 [2021-12-14 15:01:48,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:48,851 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 409 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:48,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 700 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:48,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2021-12-14 15:01:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 3406. [2021-12-14 15:01:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 1.6138032305433188) internal successors, (5495), 3405 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 5495 transitions. [2021-12-14 15:01:48,929 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 5495 transitions. Word has length 69 [2021-12-14 15:01:48,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:48,929 INFO L470 AbstractCegarLoop]: Abstraction has 3406 states and 5495 transitions. [2021-12-14 15:01:48,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 5495 transitions. [2021-12-14 15:01:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:01:48,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:48,934 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] [2021-12-14 15:01:48,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:01:48,935 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:48,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash -612676452, now seen corresponding path program 1 times [2021-12-14 15:01:48,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:48,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512580999] [2021-12-14 15:01:48,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:48,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:48,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512580999] [2021-12-14 15:01:48,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512580999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:48,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:48,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:01:48,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481012800] [2021-12-14 15:01:48,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:48,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:01:48,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:01:48,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:48,978 INFO L87 Difference]: Start difference. First operand 3406 states and 5495 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:49,058 INFO L93 Difference]: Finished difference Result 7756 states and 12516 transitions. [2021-12-14 15:01:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:01:49,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-14 15:01:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:49,074 INFO L225 Difference]: With dead ends: 7756 [2021-12-14 15:01:49,074 INFO L226 Difference]: Without dead ends: 5334 [2021-12-14 15:01:49,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:49,079 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 110 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 431 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 [2021-12-14 15:01:49,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 431 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-12-14 15:01:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 5332. [2021-12-14 15:01:49,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5332 states, 5331 states have (on average 1.6008253610954792) internal successors, (8534), 5331 states have internal predecessors, (8534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:49,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5332 states to 5332 states and 8534 transitions. [2021-12-14 15:01:49,236 INFO L78 Accepts]: Start accepts. Automaton has 5332 states and 8534 transitions. Word has length 70 [2021-12-14 15:01:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:49,236 INFO L470 AbstractCegarLoop]: Abstraction has 5332 states and 8534 transitions. [2021-12-14 15:01:49,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 5332 states and 8534 transitions. [2021-12-14 15:01:49,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:01:49,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:49,238 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] [2021-12-14 15:01:49,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:01:49,238 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:49,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1846404324, now seen corresponding path program 1 times [2021-12-14 15:01:49,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:49,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399594921] [2021-12-14 15:01:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:49,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:49,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:49,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399594921] [2021-12-14 15:01:49,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399594921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:49,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:49,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:01:49,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423924941] [2021-12-14 15:01:49,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:49,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:01:49,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:49,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:01:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:49,274 INFO L87 Difference]: Start difference. First operand 5332 states and 8534 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:49,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:49,427 INFO L93 Difference]: Finished difference Result 11652 states and 18696 transitions. [2021-12-14 15:01:49,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:01:49,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-14 15:01:49,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:49,458 INFO L225 Difference]: With dead ends: 11652 [2021-12-14 15:01:49,458 INFO L226 Difference]: Without dead ends: 7898 [2021-12-14 15:01:49,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:49,465 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 116 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 465 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 [2021-12-14 15:01:49,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 465 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7898 states. [2021-12-14 15:01:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7898 to 7896. [2021-12-14 15:01:49,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7896 states, 7895 states have (on average 1.592400253324889) internal successors, (12572), 7895 states have internal predecessors, (12572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7896 states to 7896 states and 12572 transitions. [2021-12-14 15:01:49,700 INFO L78 Accepts]: Start accepts. Automaton has 7896 states and 12572 transitions. Word has length 70 [2021-12-14 15:01:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:49,700 INFO L470 AbstractCegarLoop]: Abstraction has 7896 states and 12572 transitions. [2021-12-14 15:01:49,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 7896 states and 12572 transitions. [2021-12-14 15:01:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-14 15:01:49,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:49,702 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] [2021-12-14 15:01:49,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:01:49,702 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:49,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:49,702 INFO L85 PathProgramCache]: Analyzing trace with hash -827061860, now seen corresponding path program 1 times [2021-12-14 15:01:49,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:49,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522909252] [2021-12-14 15:01:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:49,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:49,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:49,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:49,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522909252] [2021-12-14 15:01:49,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522909252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:49,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:49,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:01:49,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94101545] [2021-12-14 15:01:49,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:49,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:01:49,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:49,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:01:49,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:49,726 INFO L87 Difference]: Start difference. First operand 7896 states and 12572 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:49,966 INFO L93 Difference]: Finished difference Result 17505 states and 28102 transitions. [2021-12-14 15:01:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:01:49,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-14 15:01:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:49,990 INFO L225 Difference]: With dead ends: 17505 [2021-12-14 15:01:49,990 INFO L226 Difference]: Without dead ends: 11757 [2021-12-14 15:01:50,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:01:50,002 INFO L933 BasicCegarLoop]: 309 mSDtfsCounter, 122 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 491 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 [2021-12-14 15:01:50,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 491 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2021-12-14 15:01:50,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11755. [2021-12-14 15:01:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11755 states, 11754 states have (on average 1.5875446656457377) internal successors, (18660), 11754 states have internal predecessors, (18660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11755 states to 11755 states and 18660 transitions. [2021-12-14 15:01:50,355 INFO L78 Accepts]: Start accepts. Automaton has 11755 states and 18660 transitions. Word has length 70 [2021-12-14 15:01:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:50,355 INFO L470 AbstractCegarLoop]: Abstraction has 11755 states and 18660 transitions. [2021-12-14 15:01:50,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:50,356 INFO L276 IsEmpty]: Start isEmpty. Operand 11755 states and 18660 transitions. [2021-12-14 15:01:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-14 15:01:50,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:50,356 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] [2021-12-14 15:01:50,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:01:50,356 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:50,357 INFO L85 PathProgramCache]: Analyzing trace with hash 287488266, now seen corresponding path program 1 times [2021-12-14 15:01:50,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:50,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472293704] [2021-12-14 15:01:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:50,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:50,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:50,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472293704] [2021-12-14 15:01:50,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472293704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:50,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:50,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:01:50,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266459361] [2021-12-14 15:01:50,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:50,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:01:50,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:01:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:50,460 INFO L87 Difference]: Start difference. First operand 11755 states and 18660 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:50,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:50,723 INFO L93 Difference]: Finished difference Result 23432 states and 37211 transitions. [2021-12-14 15:01:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:01:50,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-14 15:01:50,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:50,742 INFO L225 Difference]: With dead ends: 23432 [2021-12-14 15:01:50,742 INFO L226 Difference]: Without dead ends: 11757 [2021-12-14 15:01:50,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:01:50,755 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 189 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:50,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 754 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11757 states. [2021-12-14 15:01:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11757 to 11755. [2021-12-14 15:01:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11755 states, 11754 states have (on average 1.576909988089161) internal successors, (18535), 11754 states have internal predecessors, (18535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11755 states to 11755 states and 18535 transitions. [2021-12-14 15:01:51,128 INFO L78 Accepts]: Start accepts. Automaton has 11755 states and 18535 transitions. Word has length 71 [2021-12-14 15:01:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:51,128 INFO L470 AbstractCegarLoop]: Abstraction has 11755 states and 18535 transitions. [2021-12-14 15:01:51,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 11755 states and 18535 transitions. [2021-12-14 15:01:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-14 15:01:51,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:51,129 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] [2021-12-14 15:01:51,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 15:01:51,129 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:51,129 INFO L85 PathProgramCache]: Analyzing trace with hash 2101127620, now seen corresponding path program 1 times [2021-12-14 15:01:51,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:51,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662420381] [2021-12-14 15:01:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:51,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:51,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662420381] [2021-12-14 15:01:51,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662420381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:51,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:51,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:01:51,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563530431] [2021-12-14 15:01:51,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:51,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:01:51,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:51,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:01:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:51,222 INFO L87 Difference]: Start difference. First operand 11755 states and 18535 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:51,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:51,632 INFO L93 Difference]: Finished difference Result 33676 states and 53245 transitions. [2021-12-14 15:01:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:01:51,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-14 15:01:51,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:51,673 INFO L225 Difference]: With dead ends: 33676 [2021-12-14 15:01:51,673 INFO L226 Difference]: Without dead ends: 22001 [2021-12-14 15:01:51,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:01:51,693 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 297 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:51,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 577 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22001 states. [2021-12-14 15:01:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22001 to 21999. [2021-12-14 15:01:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21999 states, 21998 states have (on average 1.565142285662333) internal successors, (34430), 21998 states have internal predecessors, (34430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21999 states to 21999 states and 34430 transitions. [2021-12-14 15:01:52,232 INFO L78 Accepts]: Start accepts. Automaton has 21999 states and 34430 transitions. Word has length 74 [2021-12-14 15:01:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:52,233 INFO L470 AbstractCegarLoop]: Abstraction has 21999 states and 34430 transitions. [2021-12-14 15:01:52,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:52,233 INFO L276 IsEmpty]: Start isEmpty. Operand 21999 states and 34430 transitions. [2021-12-14 15:01:52,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 15:01:52,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:52,233 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] [2021-12-14 15:01:52,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 15:01:52,234 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:52,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:52,234 INFO L85 PathProgramCache]: Analyzing trace with hash 281871155, now seen corresponding path program 1 times [2021-12-14 15:01:52,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:52,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332860064] [2021-12-14 15:01:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:52,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:01:52,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:52,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332860064] [2021-12-14 15:01:52,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332860064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:52,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:52,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:01:52,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030401447] [2021-12-14 15:01:52,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:52,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:01:52,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:52,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:01:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:52,302 INFO L87 Difference]: Start difference. First operand 21999 states and 34430 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:53,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:53,096 INFO L93 Difference]: Finished difference Result 42906 states and 66447 transitions. [2021-12-14 15:01:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:01:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-14 15:01:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:53,189 INFO L225 Difference]: With dead ends: 42906 [2021-12-14 15:01:53,189 INFO L226 Difference]: Without dead ends: 42904 [2021-12-14 15:01:53,206 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 [2021-12-14 15:01:53,207 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 368 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:53,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 926 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42904 states. [2021-12-14 15:01:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42904 to 23085. [2021-12-14 15:01:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23085 states, 23084 states have (on average 1.5381649627447582) internal successors, (35507), 23084 states have internal predecessors, (35507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23085 states to 23085 states and 35507 transitions. [2021-12-14 15:01:53,905 INFO L78 Accepts]: Start accepts. Automaton has 23085 states and 35507 transitions. Word has length 75 [2021-12-14 15:01:53,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:53,905 INFO L470 AbstractCegarLoop]: Abstraction has 23085 states and 35507 transitions. [2021-12-14 15:01:53,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:53,906 INFO L276 IsEmpty]: Start isEmpty. Operand 23085 states and 35507 transitions. [2021-12-14 15:01:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 15:01:53,907 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:53,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:01:53,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 15:01:53,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:53,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:53,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1623964746, now seen corresponding path program 1 times [2021-12-14 15:01:53,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:53,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804749394] [2021-12-14 15:01:53,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:53,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-14 15:01:53,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:53,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804749394] [2021-12-14 15:01:53,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804749394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:53,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:53,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:01:53,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590880703] [2021-12-14 15:01:53,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:53,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:01:53,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:01:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:53,954 INFO L87 Difference]: Start difference. First operand 23085 states and 35507 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:54,697 INFO L93 Difference]: Finished difference Result 56425 states and 87035 transitions. [2021-12-14 15:01:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:01:54,697 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 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 103 [2021-12-14 15:01:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:54,773 INFO L225 Difference]: With dead ends: 56425 [2021-12-14 15:01:54,773 INFO L226 Difference]: Without dead ends: 45483 [2021-12-14 15:01:54,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:01:54,800 INFO L933 BasicCegarLoop]: 348 mSDtfsCounter, 521 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:54,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 974 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45483 states. [2021-12-14 15:01:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45483 to 35477. [2021-12-14 15:01:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35477 states, 35476 states have (on average 1.5366163039801557) internal successors, (54513), 35476 states have internal predecessors, (54513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35477 states to 35477 states and 54513 transitions. [2021-12-14 15:01:55,968 INFO L78 Accepts]: Start accepts. Automaton has 35477 states and 54513 transitions. Word has length 103 [2021-12-14 15:01:55,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:55,968 INFO L470 AbstractCegarLoop]: Abstraction has 35477 states and 54513 transitions. [2021-12-14 15:01:55,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:55,969 INFO L276 IsEmpty]: Start isEmpty. Operand 35477 states and 54513 transitions. [2021-12-14 15:01:55,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 15:01:55,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:55,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:01:55,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 15:01:55,971 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash 390236874, now seen corresponding path program 1 times [2021-12-14 15:01:55,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:55,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043240845] [2021-12-14 15:01:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:55,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 15:01:56,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:56,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043240845] [2021-12-14 15:01:56,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043240845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:56,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:56,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:01:56,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633144616] [2021-12-14 15:01:56,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:56,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:01:56,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:56,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:01:56,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:56,019 INFO L87 Difference]: Start difference. First operand 35477 states and 54513 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:57,002 INFO L93 Difference]: Finished difference Result 60801 states and 93795 transitions. [2021-12-14 15:01:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:01:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 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 103 [2021-12-14 15:01:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:57,092 INFO L225 Difference]: With dead ends: 60801 [2021-12-14 15:01:57,093 INFO L226 Difference]: Without dead ends: 49859 [2021-12-14 15:01:57,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:01:57,122 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 524 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:57,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 967 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:57,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49859 states. [2021-12-14 15:01:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49859 to 48061. [2021-12-14 15:01:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48061 states, 48060 states have (on average 1.5370994590095715) internal successors, (73873), 48060 states have internal predecessors, (73873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48061 states to 48061 states and 73873 transitions. [2021-12-14 15:01:58,596 INFO L78 Accepts]: Start accepts. Automaton has 48061 states and 73873 transitions. Word has length 103 [2021-12-14 15:01:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:01:58,597 INFO L470 AbstractCegarLoop]: Abstraction has 48061 states and 73873 transitions. [2021-12-14 15:01:58,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 48061 states and 73873 transitions. [2021-12-14 15:01:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 15:01:58,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:01:58,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:01:58,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 15:01:58,599 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:01:58,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:01:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1409579338, now seen corresponding path program 1 times [2021-12-14 15:01:58,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:01:58,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095074342] [2021-12-14 15:01:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:01:58,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:01:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:01:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:01:58,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:01:58,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095074342] [2021-12-14 15:01:58,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095074342] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:01:58,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:01:58,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:01:58,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681519561] [2021-12-14 15:01:58,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:01:58,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:01:58,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:01:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:01:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:01:58,648 INFO L87 Difference]: Start difference. First operand 48061 states and 73873 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:01:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:01:59,620 INFO L93 Difference]: Finished difference Result 68229 states and 105413 transitions. [2021-12-14 15:01:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 15:01:59,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 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 103 [2021-12-14 15:01:59,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:01:59,728 INFO L225 Difference]: With dead ends: 68229 [2021-12-14 15:01:59,729 INFO L226 Difference]: Without dead ends: 57027 [2021-12-14 15:01:59,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:01:59,748 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 518 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:01:59,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1002 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:01:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57027 states. [2021-12-14 15:02:01,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57027 to 55229. [2021-12-14 15:02:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55229 states, 55228 states have (on average 1.5394546244658507) internal successors, (85021), 55228 states have internal predecessors, (85021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55229 states to 55229 states and 85021 transitions. [2021-12-14 15:02:01,236 INFO L78 Accepts]: Start accepts. Automaton has 55229 states and 85021 transitions. Word has length 103 [2021-12-14 15:02:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:02:01,236 INFO L470 AbstractCegarLoop]: Abstraction has 55229 states and 85021 transitions. [2021-12-14 15:02:01,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 55229 states and 85021 transitions. [2021-12-14 15:02:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 15:02:01,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:02:01,241 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:02:01,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 15:02:01,241 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:02:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:02:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1175546085, now seen corresponding path program 1 times [2021-12-14 15:02:01,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:02:01,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942631444] [2021-12-14 15:02:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:02:01,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:02:01,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:02:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:02:01,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:02:01,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942631444] [2021-12-14 15:02:01,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942631444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:02:01,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:02:01,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:02:01,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953376597] [2021-12-14 15:02:01,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:02:01,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:02:01,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:02:01,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:02:01,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:02:01,282 INFO L87 Difference]: Start difference. First operand 55229 states and 85021 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:02:02,600 INFO L93 Difference]: Finished difference Result 90092 states and 139360 transitions. [2021-12-14 15:02:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:02:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 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 104 [2021-12-14 15:02:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:02:02,705 INFO L225 Difference]: With dead ends: 90092 [2021-12-14 15:02:02,705 INFO L226 Difference]: Without dead ends: 71722 [2021-12-14 15:02:02,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:02:02,737 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 229 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:02:02,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 671 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:02:02,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71722 states. [2021-12-14 15:02:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71722 to 69926. [2021-12-14 15:02:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69926 states, 69925 states have (on average 1.5396639256346085) internal successors, (107661), 69925 states have internal predecessors, (107661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:04,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69926 states to 69926 states and 107661 transitions. [2021-12-14 15:02:04,508 INFO L78 Accepts]: Start accepts. Automaton has 69926 states and 107661 transitions. Word has length 104 [2021-12-14 15:02:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:02:04,509 INFO L470 AbstractCegarLoop]: Abstraction has 69926 states and 107661 transitions. [2021-12-14 15:02:04,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 69926 states and 107661 transitions. [2021-12-14 15:02:04,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-14 15:02:04,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:02:04,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:02:04,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 15:02:04,511 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:02:04,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:02:04,512 INFO L85 PathProgramCache]: Analyzing trace with hash -752844259, now seen corresponding path program 1 times [2021-12-14 15:02:04,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:02:04,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360309156] [2021-12-14 15:02:04,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:02:04,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:02:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:02:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 15:02:04,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:02:04,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360309156] [2021-12-14 15:02:04,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360309156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:02:04,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:02:04,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:02:04,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143059033] [2021-12-14 15:02:04,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:02:04,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:02:04,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:02:04,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:02:04,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:02:04,546 INFO L87 Difference]: Start difference. First operand 69926 states and 107661 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:02:07,140 INFO L93 Difference]: Finished difference Result 151130 states and 233412 transitions. [2021-12-14 15:02:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:02:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 104 [2021-12-14 15:02:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:02:07,358 INFO L225 Difference]: With dead ends: 151130 [2021-12-14 15:02:07,358 INFO L226 Difference]: Without dead ends: 118200 [2021-12-14 15:02:07,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:02:07,419 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 99 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:02:07,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 388 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:02:07,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118200 states. [2021-12-14 15:02:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118200 to 117922. [2021-12-14 15:02:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117922 states, 117921 states have (on average 1.5394119792064178) internal successors, (181529), 117921 states have internal predecessors, (181529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117922 states to 117922 states and 181529 transitions. [2021-12-14 15:02:10,774 INFO L78 Accepts]: Start accepts. Automaton has 117922 states and 181529 transitions. Word has length 104 [2021-12-14 15:02:10,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:02:10,774 INFO L470 AbstractCegarLoop]: Abstraction has 117922 states and 181529 transitions. [2021-12-14 15:02:10,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:10,774 INFO L276 IsEmpty]: Start isEmpty. Operand 117922 states and 181529 transitions. [2021-12-14 15:02:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 15:02:10,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:02:10,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:02:10,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-14 15:02:10,785 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:02:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:02:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash 123384353, now seen corresponding path program 1 times [2021-12-14 15:02:10,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:02:10,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237474774] [2021-12-14 15:02:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:02:10,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:02:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:02:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 15:02:10,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:02:10,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237474774] [2021-12-14 15:02:10,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237474774] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:02:10,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:02:10,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 15:02:10,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976094905] [2021-12-14 15:02:10,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:02:10,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 15:02:10,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:02:10,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 15:02:10,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:02:10,828 INFO L87 Difference]: Start difference. First operand 117922 states and 181529 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:13,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:02:13,845 INFO L93 Difference]: Finished difference Result 180485 states and 278784 transitions. [2021-12-14 15:02:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 15:02:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-14 15:02:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:02:14,239 INFO L225 Difference]: With dead ends: 180485 [2021-12-14 15:02:14,239 INFO L226 Difference]: Without dead ends: 146375 [2021-12-14 15:02:14,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 15:02:14,280 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 229 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:02:14,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 730 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:02:14,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146375 states. [2021-12-14 15:02:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146375 to 139219. [2021-12-14 15:02:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139219 states, 139218 states have (on average 1.538472036661926) internal successors, (214183), 139218 states have internal predecessors, (214183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:18,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139219 states to 139219 states and 214183 transitions. [2021-12-14 15:02:18,136 INFO L78 Accepts]: Start accepts. Automaton has 139219 states and 214183 transitions. Word has length 105 [2021-12-14 15:02:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:02:18,136 INFO L470 AbstractCegarLoop]: Abstraction has 139219 states and 214183 transitions. [2021-12-14 15:02:18,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 15:02:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 139219 states and 214183 transitions. [2021-12-14 15:02:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-14 15:02:18,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:02:18,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:02:18,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-14 15:02:18,139 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:02:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:02:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash -897684001, now seen corresponding path program 1 times [2021-12-14 15:02:18,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:02:18,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990425055] [2021-12-14 15:02:18,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:02:18,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:02:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:02:18,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 15:02:18,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:02:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990425055] [2021-12-14 15:02:18,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990425055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:02:18,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:02:18,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 15:02:18,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553404020] [2021-12-14 15:02:18,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:02:18,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:02:18,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:02:18,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:02:18,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 15:02:18,176 INFO L87 Difference]: Start difference. First operand 139219 states and 214183 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)