./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/openssl-simplified/s3_srvr_14.cil.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 9f75fa2e9def7f0d516fdc877ae1f37f4d5f7bd5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 19:38:43,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:38:43,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:38:43,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:38:43,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:38:43,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:38:43,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:38:43,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:38:43,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:38:43,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:38:43,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:38:43,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:38:43,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:38:43,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:38:43,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:38:43,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:38:43,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:38:44,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:38:44,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:38:44,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:38:44,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:38:44,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:38:44,010 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:38:44,011 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:38:44,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:38:44,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:38:44,017 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:38:44,018 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:38:44,018 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:38:44,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:38:44,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:38:44,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:38:44,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:38:44,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:38:44,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:38:44,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:38:44,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:38:44,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:38:44,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:38:44,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:38:44,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:38:44,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:38:44,061 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:38:44,061 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:38:44,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:38:44,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:38:44,064 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:38:44,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:38:44,064 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:38:44,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:38:44,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:38:44,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:38:44,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:38:44,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:38:44,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:38:44,066 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:38:44,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:38:44,067 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:38:44,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:38:44,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:38:44,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:38:44,068 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:38:44,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:38:44,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:38:44,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:38:44,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:38:44,069 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:38:44,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:38:44,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:38:44,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:38:44,070 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:38:44,070 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f75fa2e9def7f0d516fdc877ae1f37f4d5f7bd5 [2020-10-25 19:38:44,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:38:44,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:38:44,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:38:44,582 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:38:44,584 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:38:44,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2020-10-25 19:38:44,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed86e9e3/8c8f8e4b9c2d49a59ce54bd5f02fceb9/FLAG18c761c08 [2020-10-25 19:38:45,411 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:38:45,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2020-10-25 19:38:45,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed86e9e3/8c8f8e4b9c2d49a59ce54bd5f02fceb9/FLAG18c761c08 [2020-10-25 19:38:45,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ed86e9e3/8c8f8e4b9c2d49a59ce54bd5f02fceb9 [2020-10-25 19:38:45,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:38:45,680 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:38:45,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:38:45,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:38:45,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:38:45,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:38:45" (1/1) ... [2020-10-25 19:38:45,695 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ec1496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:45, skipping insertion in model container [2020-10-25 19:38:45,695 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:38:45" (1/1) ... [2020-10-25 19:38:45,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:38:45,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:38:46,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:38:46,056 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:38:46,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:38:46,230 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:38:46,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46 WrapperNode [2020-10-25 19:38:46,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:38:46,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:38:46,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:38:46,238 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:38:46,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,314 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:38:46,315 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:38:46,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:38:46,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:38:46,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,351 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... [2020-10-25 19:38:46,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:38:46,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:38:46,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:38:46,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:38:46,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:38:46,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:38:46,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:38:46,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:38:46,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:38:46,707 WARN L798 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-10-25 19:38:47,386 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2020-10-25 19:38:47,387 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2020-10-25 19:38:47,408 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:38:47,409 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 19:38:47,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:38:47 BoogieIcfgContainer [2020-10-25 19:38:47,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:38:47,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:38:47,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:38:47,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:38:47,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:38:45" (1/3) ... [2020-10-25 19:38:47,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a6391b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:38:47, skipping insertion in model container [2020-10-25 19:38:47,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:38:46" (2/3) ... [2020-10-25 19:38:47,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21a6391b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:38:47, skipping insertion in model container [2020-10-25 19:38:47,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:38:47" (3/3) ... [2020-10-25 19:38:47,430 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2020-10-25 19:38:47,449 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:38:47,455 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:38:47,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:38:47,518 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:38:47,518 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:38:47,518 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:38:47,518 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:38:47,519 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:38:47,519 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:38:47,519 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:38:47,519 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:38:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-10-25 19:38:47,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 19:38:47,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:47,557 INFO L422 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] [2020-10-25 19:38:47,557 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:47,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:47,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1180429726, now seen corresponding path program 1 times [2020-10-25 19:38:47,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:47,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161270889] [2020-10-25 19:38:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:47,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161270889] [2020-10-25 19:38:47,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:47,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:47,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687782506] [2020-10-25 19:38:47,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:47,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:47,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:47,873 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 3 states. [2020-10-25 19:38:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:48,169 INFO L93 Difference]: Finished difference Result 325 states and 557 transitions. [2020-10-25 19:38:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:48,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-25 19:38:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:48,186 INFO L225 Difference]: With dead ends: 325 [2020-10-25 19:38:48,186 INFO L226 Difference]: Without dead ends: 161 [2020-10-25 19:38:48,190 INFO L677 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 [2020-10-25 19:38:48,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-25 19:38:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2020-10-25 19:38:48,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-25 19:38:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 249 transitions. [2020-10-25 19:38:48,257 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 249 transitions. Word has length 23 [2020-10-25 19:38:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:48,258 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 249 transitions. [2020-10-25 19:38:48,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:48,258 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 249 transitions. [2020-10-25 19:38:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 19:38:48,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:48,262 INFO L422 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] [2020-10-25 19:38:48,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:38:48,263 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash -932054356, now seen corresponding path program 1 times [2020-10-25 19:38:48,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:48,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806325469] [2020-10-25 19:38:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:48,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806325469] [2020-10-25 19:38:48,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:48,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:48,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238481537] [2020-10-25 19:38:48,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:48,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:48,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:48,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:48,373 INFO L87 Difference]: Start difference. First operand 157 states and 249 transitions. Second operand 3 states. [2020-10-25 19:38:48,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:48,555 INFO L93 Difference]: Finished difference Result 331 states and 523 transitions. [2020-10-25 19:38:48,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:48,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-25 19:38:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:48,558 INFO L225 Difference]: With dead ends: 331 [2020-10-25 19:38:48,558 INFO L226 Difference]: Without dead ends: 182 [2020-10-25 19:38:48,560 INFO L677 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 [2020-10-25 19:38:48,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-25 19:38:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2020-10-25 19:38:48,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-25 19:38:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 282 transitions. [2020-10-25 19:38:48,581 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 282 transitions. Word has length 24 [2020-10-25 19:38:48,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:48,582 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 282 transitions. [2020-10-25 19:38:48,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 282 transitions. [2020-10-25 19:38:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 19:38:48,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:48,584 INFO L422 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] [2020-10-25 19:38:48,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 19:38:48,585 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash -945010985, now seen corresponding path program 1 times [2020-10-25 19:38:48,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:48,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640155025] [2020-10-25 19:38:48,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:48,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640155025] [2020-10-25 19:38:48,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:48,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:48,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965116213] [2020-10-25 19:38:48,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:48,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:48,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:48,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:48,707 INFO L87 Difference]: Start difference. First operand 180 states and 282 transitions. Second operand 3 states. [2020-10-25 19:38:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:48,923 INFO L93 Difference]: Finished difference Result 362 states and 567 transitions. [2020-10-25 19:38:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:48,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-25 19:38:48,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:48,928 INFO L225 Difference]: With dead ends: 362 [2020-10-25 19:38:48,930 INFO L226 Difference]: Without dead ends: 190 [2020-10-25 19:38:48,935 INFO L677 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 [2020-10-25 19:38:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-25 19:38:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-10-25 19:38:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-25 19:38:48,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 293 transitions. [2020-10-25 19:38:48,968 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 293 transitions. Word has length 24 [2020-10-25 19:38:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:48,969 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 293 transitions. [2020-10-25 19:38:48,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:48,971 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 293 transitions. [2020-10-25 19:38:48,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 19:38:48,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:48,974 INFO L422 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] [2020-10-25 19:38:48,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 19:38:48,976 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:48,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1648361961, now seen corresponding path program 1 times [2020-10-25 19:38:48,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:48,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957421532] [2020-10-25 19:38:48,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:49,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957421532] [2020-10-25 19:38:49,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:49,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:49,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746811459] [2020-10-25 19:38:49,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:49,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:49,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:49,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:49,107 INFO L87 Difference]: Start difference. First operand 186 states and 293 transitions. Second operand 3 states. [2020-10-25 19:38:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:49,296 INFO L93 Difference]: Finished difference Result 367 states and 577 transitions. [2020-10-25 19:38:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:49,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-25 19:38:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:49,298 INFO L225 Difference]: With dead ends: 367 [2020-10-25 19:38:49,299 INFO L226 Difference]: Without dead ends: 189 [2020-10-25 19:38:49,308 INFO L677 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 [2020-10-25 19:38:49,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-25 19:38:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-25 19:38:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-25 19:38:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 294 transitions. [2020-10-25 19:38:49,337 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 294 transitions. Word has length 24 [2020-10-25 19:38:49,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:49,338 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 294 transitions. [2020-10-25 19:38:49,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:49,338 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 294 transitions. [2020-10-25 19:38:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-25 19:38:49,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:49,341 INFO L422 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] [2020-10-25 19:38:49,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-25 19:38:49,342 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:49,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:49,343 INFO L82 PathProgramCache]: Analyzing trace with hash 688817562, now seen corresponding path program 1 times [2020-10-25 19:38:49,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:49,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364624010] [2020-10-25 19:38:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:49,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364624010] [2020-10-25 19:38:49,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:49,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:49,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56074450] [2020-10-25 19:38:49,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:49,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:49,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:49,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:49,434 INFO L87 Difference]: Start difference. First operand 187 states and 294 transitions. Second operand 3 states. [2020-10-25 19:38:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:49,592 INFO L93 Difference]: Finished difference Result 378 states and 589 transitions. [2020-10-25 19:38:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:49,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-25 19:38:49,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:49,596 INFO L225 Difference]: With dead ends: 378 [2020-10-25 19:38:49,596 INFO L226 Difference]: Without dead ends: 199 [2020-10-25 19:38:49,597 INFO L677 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 [2020-10-25 19:38:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-25 19:38:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2020-10-25 19:38:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-25 19:38:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 292 transitions. [2020-10-25 19:38:49,615 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 292 transitions. Word has length 25 [2020-10-25 19:38:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:49,615 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 292 transitions. [2020-10-25 19:38:49,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 292 transitions. [2020-10-25 19:38:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-25 19:38:49,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:49,623 INFO L422 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] [2020-10-25 19:38:49,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-25 19:38:49,624 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:49,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1643637293, now seen corresponding path program 1 times [2020-10-25 19:38:49,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:49,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994006419] [2020-10-25 19:38:49,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:49,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994006419] [2020-10-25 19:38:49,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:49,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:49,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577852888] [2020-10-25 19:38:49,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:49,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:49,737 INFO L87 Difference]: Start difference. First operand 187 states and 292 transitions. Second operand 3 states. [2020-10-25 19:38:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:49,912 INFO L93 Difference]: Finished difference Result 378 states and 585 transitions. [2020-10-25 19:38:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:49,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-10-25 19:38:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:49,917 INFO L225 Difference]: With dead ends: 378 [2020-10-25 19:38:49,918 INFO L226 Difference]: Without dead ends: 199 [2020-10-25 19:38:49,918 INFO L677 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 [2020-10-25 19:38:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-25 19:38:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2020-10-25 19:38:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-25 19:38:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 290 transitions. [2020-10-25 19:38:49,934 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 290 transitions. Word has length 26 [2020-10-25 19:38:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:49,934 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 290 transitions. [2020-10-25 19:38:49,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:49,936 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 290 transitions. [2020-10-25 19:38:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-25 19:38:49,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:49,939 INFO L422 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] [2020-10-25 19:38:49,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-25 19:38:49,939 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash 807002645, now seen corresponding path program 1 times [2020-10-25 19:38:49,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:49,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361752652] [2020-10-25 19:38:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:49,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361752652] [2020-10-25 19:38:49,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:50,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:50,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915489659] [2020-10-25 19:38:50,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:50,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:50,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:50,003 INFO L87 Difference]: Start difference. First operand 187 states and 290 transitions. Second operand 3 states. [2020-10-25 19:38:50,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:50,184 INFO L93 Difference]: Finished difference Result 378 states and 581 transitions. [2020-10-25 19:38:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:50,187 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-25 19:38:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:50,189 INFO L225 Difference]: With dead ends: 378 [2020-10-25 19:38:50,189 INFO L226 Difference]: Without dead ends: 199 [2020-10-25 19:38:50,191 INFO L677 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 [2020-10-25 19:38:50,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-25 19:38:50,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2020-10-25 19:38:50,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-25 19:38:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 288 transitions. [2020-10-25 19:38:50,201 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 288 transitions. Word has length 27 [2020-10-25 19:38:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:50,203 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 288 transitions. [2020-10-25 19:38:50,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 288 transitions. [2020-10-25 19:38:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-25 19:38:50,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:50,207 INFO L422 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] [2020-10-25 19:38:50,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-25 19:38:50,207 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:50,208 INFO L82 PathProgramCache]: Analyzing trace with hash -583213996, now seen corresponding path program 1 times [2020-10-25 19:38:50,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:50,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000655138] [2020-10-25 19:38:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:50,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000655138] [2020-10-25 19:38:50,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:50,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:50,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979966583] [2020-10-25 19:38:50,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:50,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:50,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:50,271 INFO L87 Difference]: Start difference. First operand 187 states and 288 transitions. Second operand 3 states. [2020-10-25 19:38:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:50,295 INFO L93 Difference]: Finished difference Result 537 states and 823 transitions. [2020-10-25 19:38:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:50,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-25 19:38:50,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:50,299 INFO L225 Difference]: With dead ends: 537 [2020-10-25 19:38:50,299 INFO L226 Difference]: Without dead ends: 358 [2020-10-25 19:38:50,301 INFO L677 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 [2020-10-25 19:38:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-25 19:38:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2020-10-25 19:38:50,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-10-25 19:38:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 543 transitions. [2020-10-25 19:38:50,320 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 543 transitions. Word has length 27 [2020-10-25 19:38:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:50,320 INFO L481 AbstractCegarLoop]: Abstraction has 356 states and 543 transitions. [2020-10-25 19:38:50,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 543 transitions. [2020-10-25 19:38:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-25 19:38:50,321 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:50,331 INFO L422 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] [2020-10-25 19:38:50,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-25 19:38:50,331 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:50,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1263978570, now seen corresponding path program 1 times [2020-10-25 19:38:50,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:50,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143109692] [2020-10-25 19:38:50,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:50,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143109692] [2020-10-25 19:38:50,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:50,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:38:50,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362279761] [2020-10-25 19:38:50,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:38:50,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:50,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:38:50,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:38:50,387 INFO L87 Difference]: Start difference. First operand 356 states and 543 transitions. Second operand 4 states. [2020-10-25 19:38:50,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:50,769 INFO L93 Difference]: Finished difference Result 1100 states and 1680 transitions. [2020-10-25 19:38:50,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 19:38:50,770 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-25 19:38:50,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:50,775 INFO L225 Difference]: With dead ends: 1100 [2020-10-25 19:38:50,776 INFO L226 Difference]: Without dead ends: 753 [2020-10-25 19:38:50,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-25 19:38:50,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2020-10-25 19:38:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 599. [2020-10-25 19:38:50,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 599 states. [2020-10-25 19:38:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 928 transitions. [2020-10-25 19:38:50,808 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 928 transitions. Word has length 28 [2020-10-25 19:38:50,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:50,808 INFO L481 AbstractCegarLoop]: Abstraction has 599 states and 928 transitions. [2020-10-25 19:38:50,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:38:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 928 transitions. [2020-10-25 19:38:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-25 19:38:50,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:50,811 INFO L422 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] [2020-10-25 19:38:50,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-25 19:38:50,811 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -737748410, now seen corresponding path program 1 times [2020-10-25 19:38:50,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:50,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662867795] [2020-10-25 19:38:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:50,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662867795] [2020-10-25 19:38:50,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:50,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:50,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027745997] [2020-10-25 19:38:50,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:50,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:50,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:50,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:50,856 INFO L87 Difference]: Start difference. First operand 599 states and 928 transitions. Second operand 3 states. [2020-10-25 19:38:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:51,121 INFO L93 Difference]: Finished difference Result 1331 states and 2092 transitions. [2020-10-25 19:38:51,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:51,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-10-25 19:38:51,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:51,128 INFO L225 Difference]: With dead ends: 1331 [2020-10-25 19:38:51,129 INFO L226 Difference]: Without dead ends: 741 [2020-10-25 19:38:51,130 INFO L677 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 [2020-10-25 19:38:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-10-25 19:38:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 721. [2020-10-25 19:38:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2020-10-25 19:38:51,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1143 transitions. [2020-10-25 19:38:51,169 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1143 transitions. Word has length 42 [2020-10-25 19:38:51,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:51,170 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 1143 transitions. [2020-10-25 19:38:51,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1143 transitions. [2020-10-25 19:38:51,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-25 19:38:51,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:51,172 INFO L422 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] [2020-10-25 19:38:51,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-25 19:38:51,172 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash 948641384, now seen corresponding path program 1 times [2020-10-25 19:38:51,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:51,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454294334] [2020-10-25 19:38:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:51,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454294334] [2020-10-25 19:38:51,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:51,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:51,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56169342] [2020-10-25 19:38:51,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:51,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:51,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:51,233 INFO L87 Difference]: Start difference. First operand 721 states and 1143 transitions. Second operand 3 states. [2020-10-25 19:38:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:51,525 INFO L93 Difference]: Finished difference Result 1498 states and 2392 transitions. [2020-10-25 19:38:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:51,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-10-25 19:38:51,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:51,531 INFO L225 Difference]: With dead ends: 1498 [2020-10-25 19:38:51,531 INFO L226 Difference]: Without dead ends: 786 [2020-10-25 19:38:51,532 INFO L677 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 [2020-10-25 19:38:51,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-10-25 19:38:51,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 766. [2020-10-25 19:38:51,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-25 19:38:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1228 transitions. [2020-10-25 19:38:51,571 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1228 transitions. Word has length 43 [2020-10-25 19:38:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:51,572 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 1228 transitions. [2020-10-25 19:38:51,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:51,572 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1228 transitions. [2020-10-25 19:38:51,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-25 19:38:51,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:51,573 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-25 19:38:51,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-25 19:38:51,574 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:51,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:51,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2093549194, now seen corresponding path program 1 times [2020-10-25 19:38:51,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:51,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277376161] [2020-10-25 19:38:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:51,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277376161] [2020-10-25 19:38:51,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:51,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241072320] [2020-10-25 19:38:51,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:51,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:51,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:51,612 INFO L87 Difference]: Start difference. First operand 766 states and 1228 transitions. Second operand 3 states. [2020-10-25 19:38:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:51,643 INFO L93 Difference]: Finished difference Result 1523 states and 2443 transitions. [2020-10-25 19:38:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:51,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-10-25 19:38:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:51,648 INFO L225 Difference]: With dead ends: 1523 [2020-10-25 19:38:51,648 INFO L226 Difference]: Without dead ends: 766 [2020-10-25 19:38:51,650 INFO L677 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 [2020-10-25 19:38:51,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2020-10-25 19:38:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2020-10-25 19:38:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-25 19:38:51,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1211 transitions. [2020-10-25 19:38:51,688 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1211 transitions. Word has length 44 [2020-10-25 19:38:51,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:51,688 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 1211 transitions. [2020-10-25 19:38:51,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1211 transitions. [2020-10-25 19:38:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-25 19:38:51,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:51,690 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-25 19:38:51,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-25 19:38:51,690 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:51,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:51,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1190502023, now seen corresponding path program 1 times [2020-10-25 19:38:51,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:51,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387319417] [2020-10-25 19:38:51,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:51,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:51,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387319417] [2020-10-25 19:38:51,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:51,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:51,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034436520] [2020-10-25 19:38:51,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:51,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:51,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:51,736 INFO L87 Difference]: Start difference. First operand 766 states and 1211 transitions. Second operand 3 states. [2020-10-25 19:38:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:51,796 INFO L93 Difference]: Finished difference Result 1537 states and 2426 transitions. [2020-10-25 19:38:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:51,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-10-25 19:38:51,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:51,801 INFO L225 Difference]: With dead ends: 1537 [2020-10-25 19:38:51,802 INFO L226 Difference]: Without dead ends: 780 [2020-10-25 19:38:51,803 INFO L677 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 [2020-10-25 19:38:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2020-10-25 19:38:51,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 778. [2020-10-25 19:38:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 778 states. [2020-10-25 19:38:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1209 transitions. [2020-10-25 19:38:51,845 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1209 transitions. Word has length 45 [2020-10-25 19:38:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:51,845 INFO L481 AbstractCegarLoop]: Abstraction has 778 states and 1209 transitions. [2020-10-25 19:38:51,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1209 transitions. [2020-10-25 19:38:51,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-25 19:38:51,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:51,847 INFO L422 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] [2020-10-25 19:38:51,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-25 19:38:51,848 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:51,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:51,848 INFO L82 PathProgramCache]: Analyzing trace with hash -881523047, now seen corresponding path program 1 times [2020-10-25 19:38:51,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:51,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861365816] [2020-10-25 19:38:51,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:51,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861365816] [2020-10-25 19:38:51,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:51,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:51,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779952604] [2020-10-25 19:38:51,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:51,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:51,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:51,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:51,884 INFO L87 Difference]: Start difference. First operand 778 states and 1209 transitions. Second operand 3 states. [2020-10-25 19:38:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:51,947 INFO L93 Difference]: Finished difference Result 2299 states and 3573 transitions. [2020-10-25 19:38:51,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:51,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-10-25 19:38:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:51,956 INFO L225 Difference]: With dead ends: 2299 [2020-10-25 19:38:51,956 INFO L226 Difference]: Without dead ends: 1530 [2020-10-25 19:38:51,958 INFO L677 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 [2020-10-25 19:38:51,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2020-10-25 19:38:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1218. [2020-10-25 19:38:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2020-10-25 19:38:52,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1885 transitions. [2020-10-25 19:38:52,032 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1885 transitions. Word has length 50 [2020-10-25 19:38:52,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:52,032 INFO L481 AbstractCegarLoop]: Abstraction has 1218 states and 1885 transitions. [2020-10-25 19:38:52,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1885 transitions. [2020-10-25 19:38:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-25 19:38:52,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:52,034 INFO L422 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] [2020-10-25 19:38:52,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-25 19:38:52,035 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:52,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:52,035 INFO L82 PathProgramCache]: Analyzing trace with hash 11963291, now seen corresponding path program 1 times [2020-10-25 19:38:52,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:52,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608901291] [2020-10-25 19:38:52,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:52,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608901291] [2020-10-25 19:38:52,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:52,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:52,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235610762] [2020-10-25 19:38:52,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:52,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:52,070 INFO L87 Difference]: Start difference. First operand 1218 states and 1885 transitions. Second operand 3 states. [2020-10-25 19:38:52,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:52,359 INFO L93 Difference]: Finished difference Result 2639 states and 4073 transitions. [2020-10-25 19:38:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:52,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-10-25 19:38:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:52,367 INFO L225 Difference]: With dead ends: 2639 [2020-10-25 19:38:52,368 INFO L226 Difference]: Without dead ends: 1431 [2020-10-25 19:38:52,370 INFO L677 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 [2020-10-25 19:38:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2020-10-25 19:38:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1325. [2020-10-25 19:38:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1325 states. [2020-10-25 19:38:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2000 transitions. [2020-10-25 19:38:52,447 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2000 transitions. Word has length 50 [2020-10-25 19:38:52,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:52,447 INFO L481 AbstractCegarLoop]: Abstraction has 1325 states and 2000 transitions. [2020-10-25 19:38:52,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2000 transitions. [2020-10-25 19:38:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-25 19:38:52,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:52,450 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-25 19:38:52,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-25 19:38:52,450 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:52,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:52,451 INFO L82 PathProgramCache]: Analyzing trace with hash 776292063, now seen corresponding path program 1 times [2020-10-25 19:38:52,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:52,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402992387] [2020-10-25 19:38:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-25 19:38:52,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402992387] [2020-10-25 19:38:52,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:52,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:52,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229440999] [2020-10-25 19:38:52,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:52,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:52,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:52,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:52,487 INFO L87 Difference]: Start difference. First operand 1325 states and 2000 transitions. Second operand 3 states. [2020-10-25 19:38:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:52,746 INFO L93 Difference]: Finished difference Result 2808 states and 4234 transitions. [2020-10-25 19:38:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:52,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-10-25 19:38:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:52,755 INFO L225 Difference]: With dead ends: 2808 [2020-10-25 19:38:52,755 INFO L226 Difference]: Without dead ends: 1493 [2020-10-25 19:38:52,758 INFO L677 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 [2020-10-25 19:38:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2020-10-25 19:38:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1451. [2020-10-25 19:38:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1451 states. [2020-10-25 19:38:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 2137 transitions. [2020-10-25 19:38:52,834 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 2137 transitions. Word has length 55 [2020-10-25 19:38:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:52,834 INFO L481 AbstractCegarLoop]: Abstraction has 1451 states and 2137 transitions. [2020-10-25 19:38:52,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 2137 transitions. [2020-10-25 19:38:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-25 19:38:52,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:52,837 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-25 19:38:52,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-25 19:38:52,838 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:52,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1456350433, now seen corresponding path program 1 times [2020-10-25 19:38:52,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:52,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994242237] [2020-10-25 19:38:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:52,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-25 19:38:52,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994242237] [2020-10-25 19:38:52,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:52,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:52,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118778744] [2020-10-25 19:38:52,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:52,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:52,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:52,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:52,880 INFO L87 Difference]: Start difference. First operand 1451 states and 2137 transitions. Second operand 3 states. [2020-10-25 19:38:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:52,945 INFO L93 Difference]: Finished difference Result 2739 states and 4009 transitions. [2020-10-25 19:38:52,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:52,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-10-25 19:38:52,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:52,955 INFO L225 Difference]: With dead ends: 2739 [2020-10-25 19:38:52,955 INFO L226 Difference]: Without dead ends: 1828 [2020-10-25 19:38:52,957 INFO L677 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 [2020-10-25 19:38:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2020-10-25 19:38:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1313. [2020-10-25 19:38:53,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1313 states. [2020-10-25 19:38:53,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1919 transitions. [2020-10-25 19:38:53,018 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1919 transitions. Word has length 55 [2020-10-25 19:38:53,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:53,019 INFO L481 AbstractCegarLoop]: Abstraction has 1313 states and 1919 transitions. [2020-10-25 19:38:53,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:53,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1919 transitions. [2020-10-25 19:38:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-25 19:38:53,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:53,022 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-25 19:38:53,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-25 19:38:53,022 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:53,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:53,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1301716177, now seen corresponding path program 1 times [2020-10-25 19:38:53,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:53,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678330287] [2020-10-25 19:38:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:38:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:38:53,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678330287] [2020-10-25 19:38:53,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:38:53,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 19:38:53,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962850329] [2020-10-25 19:38:53,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 19:38:53,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:38:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 19:38:53,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 19:38:53,087 INFO L87 Difference]: Start difference. First operand 1313 states and 1919 transitions. Second operand 3 states. [2020-10-25 19:38:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:38:53,204 INFO L93 Difference]: Finished difference Result 3800 states and 5511 transitions. [2020-10-25 19:38:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 19:38:53,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-10-25 19:38:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:38:53,218 INFO L225 Difference]: With dead ends: 3800 [2020-10-25 19:38:53,218 INFO L226 Difference]: Without dead ends: 2497 [2020-10-25 19:38:53,221 INFO L677 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 [2020-10-25 19:38:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2020-10-25 19:38:53,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2495. [2020-10-25 19:38:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2495 states. [2020-10-25 19:38:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3572 transitions. [2020-10-25 19:38:53,336 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3572 transitions. Word has length 56 [2020-10-25 19:38:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:38:53,336 INFO L481 AbstractCegarLoop]: Abstraction has 2495 states and 3572 transitions. [2020-10-25 19:38:53,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 19:38:53,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3572 transitions. [2020-10-25 19:38:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-25 19:38:53,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:38:53,342 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-25 19:38:53,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-25 19:38:53,342 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:38:53,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:38:53,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1196163616, now seen corresponding path program 1 times [2020-10-25 19:38:53,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:38:53,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680462686] [2020-10-25 19:38:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:38:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:38:53,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:38:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:38:53,397 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:38:53,448 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:38:53,448 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:38:53,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-25 19:38:53,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:38:53 BoogieIcfgContainer [2020-10-25 19:38:53,574 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:38:53,574 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:38:53,574 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:38:53,575 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:38:53,576 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:38:47" (3/4) ... [2020-10-25 19:38:53,578 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:38:53,711 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:38:53,711 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:38:53,714 INFO L168 Benchmark]: Toolchain (without parser) took 8039.17 ms. Allocated memory was 44.0 MB in the beginning and 167.8 MB in the end (delta: 123.7 MB). Free memory was 28.6 MB in the beginning and 46.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 105.0 MB. Max. memory is 16.1 GB. [2020-10-25 19:38:53,714 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 35.7 MB. Free memory is still 16.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:38:53,715 INFO L168 Benchmark]: CACSL2BoogieTranslator took 552.55 ms. Allocated memory is still 44.0 MB. Free memory was 27.9 MB in the beginning and 24.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-10-25 19:38:53,716 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.08 ms. Allocated memory is still 44.0 MB. Free memory was 24.3 MB in the beginning and 21.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:38:53,716 INFO L168 Benchmark]: Boogie Preprocessor took 46.16 ms. Allocated memory is still 44.0 MB. Free memory was 21.4 MB in the beginning and 19.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:38:53,716 INFO L168 Benchmark]: RCFGBuilder took 1051.75 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.2 MB in the beginning and 31.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2020-10-25 19:38:53,717 INFO L168 Benchmark]: TraceAbstraction took 6153.72 ms. Allocated memory was 54.5 MB in the beginning and 167.8 MB in the end (delta: 113.2 MB). Free memory was 31.1 MB in the beginning and 55.3 MB in the end (delta: -24.2 MB). Peak memory consumption was 88.0 MB. Max. memory is 16.1 GB. [2020-10-25 19:38:53,717 INFO L168 Benchmark]: Witness Printer took 137.17 ms. Allocated memory is still 167.8 MB. Free memory was 55.3 MB in the beginning and 46.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:38:53,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 35.7 MB. Free memory is still 16.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 552.55 ms. Allocated memory is still 44.0 MB. Free memory was 27.9 MB in the beginning and 24.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 77.08 ms. Allocated memory is still 44.0 MB. Free memory was 24.3 MB in the beginning and 21.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.16 ms. Allocated memory is still 44.0 MB. Free memory was 21.4 MB in the beginning and 19.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1051.75 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.2 MB in the beginning and 31.4 MB in the end (delta: -12.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6153.72 ms. Allocated memory was 54.5 MB in the beginning and 167.8 MB in the end (delta: 113.2 MB). Free memory was 31.1 MB in the beginning and 55.3 MB in the end (delta: -24.2 MB). Peak memory consumption was 88.0 MB. Max. memory is 16.1 GB. * Witness Printer took 137.17 ms. Allocated memory is still 167.8 MB. Free memory was 55.3 MB in the beginning and 46.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L647] int s ; [L648] int tmp ; [L652] s = 8464 [L13] int s__info_callback = __VERIFIER_nondet_int() ; [L14] int s__in_handshake = __VERIFIER_nondet_int() ; [L15] int s__state ; [L16] int s__new_session ; [L17] int s__server ; [L18] int s__version = __VERIFIER_nondet_int() ; [L19] int s__type ; [L20] int s__init_num ; [L21] int s__hit = __VERIFIER_nondet_int() ; [L22] int s__rwstate ; [L23] int s__init_buf___0 = 1; [L24] int s__debug = __VERIFIER_nondet_int() ; [L25] int s__shutdown ; [L26] int s__cert = __VERIFIER_nondet_int() ; [L27] int s__options = __VERIFIER_nondet_int() ; [L28] int s__verify_mode = __VERIFIER_nondet_int() ; [L29] int s__session__peer = __VERIFIER_nondet_int() ; [L30] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L31] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L32] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L35] int s__s3__tmp__cert_request ; [L36] int s__s3__tmp__reuse_message ; [L37] int s__s3__tmp__use_rsa_tmp ; [L38] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L39] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__next_state___0 ; [L41] int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ; [L42] int s__session__cipher ; [L43] int buf ; [L44] unsigned long l ; [L45] unsigned long Time ; [L46] unsigned long tmp ; [L47] int cb ; [L48] long num1 = __VERIFIER_nondet_long() ; [L49] int ret ; [L50] int new_state ; [L51] int state ; [L52] int skip ; [L53] int got_new_session ; [L54] int tmp___1 = __VERIFIER_nondet_int() ; [L55] int tmp___2 = __VERIFIER_nondet_int() ; [L56] int tmp___3 = __VERIFIER_nondet_int() ; [L57] int tmp___4 = __VERIFIER_nondet_int() ; [L58] int tmp___5 = __VERIFIER_nondet_int() ; [L59] int tmp___6 = __VERIFIER_nondet_int() ; [L60] int tmp___7 ; [L61] long tmp___8 = __VERIFIER_nondet_long() ; [L62] int tmp___9 = __VERIFIER_nondet_int() ; [L63] int tmp___10 = __VERIFIER_nondet_int() ; [L64] int blastFlag ; [L65] int __cil_tmp55 ; [L66] unsigned long __cil_tmp56 ; [L67] unsigned long __cil_tmp57 ; [L68] unsigned long __cil_tmp58 ; [L69] unsigned long __cil_tmp59 ; [L70] int __cil_tmp60 ; [L71] unsigned long __cil_tmp61 ; [L74] s__s3__tmp__reuse_message = 0 [L75] s__state = initial_state [L76] blastFlag = 0 [L77] tmp = __VERIFIER_nondet_int() [L78] Time = tmp [L79] cb = 0 [L80] ret = -1 [L81] skip = 0 [L82] got_new_session = 0 [L83] COND TRUE s__info_callback != 0 [L84] cb = s__info_callback [L90] s__in_handshake ++ [L91] COND TRUE tmp___1 + 12288 [L92] COND TRUE tmp___2 + 16384 [L96] COND FALSE !(s__cert == 0) [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND TRUE s__state == 8464 [L273] s__shutdown = 0 [L274] ret = __VERIFIER_nondet_int() [L275] COND TRUE blastFlag == 0 [L276] blastFlag = 1 [L278] COND FALSE !(ret <= 0) [L281] got_new_session = 1 [L282] s__state = 8496 [L283] s__init_num = 0 [L604] COND TRUE ! s__s3__tmp__reuse_message [L605] COND TRUE ! skip [L606] COND TRUE tmp___1 != -12288 [L607] COND TRUE s__state != 8656 [L608] COND TRUE tmp___2 != -16384 [L609] COND FALSE !(state == 8496) [L616] COND FALSE !(\read(s__debug)) [L622] COND TRUE cb != 0 [L623] COND TRUE s__state != state [L624] new_state = s__state [L625] s__state = state [L626] s__state = new_state [L631] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND TRUE s__state == 8496 [L287] ret = __VERIFIER_nondet_int() [L288] COND TRUE blastFlag == 1 [L289] blastFlag = 2 [L291] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 8512 [L299] s__init_num = 0 [L604] COND TRUE ! s__s3__tmp__reuse_message [L605] COND TRUE ! skip [L606] COND TRUE tmp___1 != -12288 [L607] COND TRUE s__state != 8656 [L608] COND TRUE tmp___2 != -16384 [L609] COND TRUE state == 8496 [L3] __assert_fail("0", "s3_srvr_14.cil.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 152 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.9s, OverallIterations: 19, TraceHistogramMax: 2, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3676 SDtfs, 3347 SDslu, 1453 SDs, 0 SdLazy, 1205 SolverSat, 447 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2495occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 18 MinimizatonAttempts, 1223 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 725 NumberOfCodeBlocks, 725 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 650 ConstructedInterpolants, 0 QuantifiedInterpolants, 76611 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 118/118 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...