./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 20ed64ec 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 0.2.1-dev-20ed64e [2021-08-25 20:13:01,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 20:13:01,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 20:13:01,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 20:13:01,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 20:13:01,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 20:13:01,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 20:13:01,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 20:13:01,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 20:13:01,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 20:13:01,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 20:13:01,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 20:13:01,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 20:13:01,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 20:13:01,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 20:13:01,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 20:13:01,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 20:13:01,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 20:13:01,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 20:13:01,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 20:13:01,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 20:13:01,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 20:13:01,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 20:13:01,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 20:13:01,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 20:13:01,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 20:13:01,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 20:13:01,923 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 20:13:01,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 20:13:01,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 20:13:01,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 20:13:01,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 20:13:01,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 20:13:01,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 20:13:01,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 20:13:01,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 20:13:01,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 20:13:01,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 20:13:01,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 20:13:01,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 20:13:01,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 20:13:01,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 20:13:01,959 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 20:13:01,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 20:13:01,960 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 20:13:01,960 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 20:13:01,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 20:13:01,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 20:13:01,962 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 20:13:01,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 20:13:01,963 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 20:13:01,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 20:13:01,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 20:13:01,964 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 20:13:01,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 20:13:01,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 20:13:01,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 20:13:01,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 20:13:01,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 20:13:01,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 20:13:01,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 20:13:01,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 20:13:01,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 20:13:01,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 20:13:01,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:13:01,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 20:13:01,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 20:13:01,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 20:13:01,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 20:13:01,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 20:13:01,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 20:13:01,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 20:13:01,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f75fa2e9def7f0d516fdc877ae1f37f4d5f7bd5 [2021-08-25 20:13:02,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 20:13:02,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 20:13:02,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 20:13:02,255 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 20:13:02,256 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 20:13:02,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2021-08-25 20:13:02,307 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b802b17/b230ca9bf0944fff9f4d3a7dd8f3dab4/FLAG17bbcfd04 [2021-08-25 20:13:02,641 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 20:13:02,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c [2021-08-25 20:13:02,658 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b802b17/b230ca9bf0944fff9f4d3a7dd8f3dab4/FLAG17bbcfd04 [2021-08-25 20:13:03,057 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79b802b17/b230ca9bf0944fff9f4d3a7dd8f3dab4 [2021-08-25 20:13:03,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 20:13:03,060 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 20:13:03,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 20:13:03,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 20:13:03,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 20:13:03,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32e2e879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03, skipping insertion in model container [2021-08-25 20:13:03,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 20:13:03,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 20:13:03,273 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c[44685,44698] [2021-08-25 20:13:03,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:13:03,288 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 20:13:03,364 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_14.cil.c[44685,44698] [2021-08-25 20:13:03,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:13:03,381 INFO L208 MainTranslator]: Completed translation [2021-08-25 20:13:03,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03 WrapperNode [2021-08-25 20:13:03,383 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 20:13:03,384 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 20:13:03,384 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 20:13:03,385 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 20:13:03,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,447 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 20:13:03,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 20:13:03,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 20:13:03,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 20:13:03,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 20:13:03,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 20:13:03,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 20:13:03,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 20:13:03,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (1/1) ... [2021-08-25 20:13:03,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:13:03,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:03,526 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 20:13:03,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 20:13:03,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 20:13:03,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 20:13:03,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 20:13:03,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 20:13:03,690 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-08-25 20:13:04,163 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-08-25 20:13:04,163 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-08-25 20:13:04,168 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 20:13:04,168 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-25 20:13:04,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:04 BoogieIcfgContainer [2021-08-25 20:13:04,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 20:13:04,175 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 20:13:04,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 20:13:04,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 20:13:04,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 08:13:03" (1/3) ... [2021-08-25 20:13:04,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d93a929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:13:04, skipping insertion in model container [2021-08-25 20:13:04,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:13:03" (2/3) ... [2021-08-25 20:13:04,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d93a929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:13:04, skipping insertion in model container [2021-08-25 20:13:04,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:04" (3/3) ... [2021-08-25 20:13:04,180 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c [2021-08-25 20:13:04,188 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 20:13:04,191 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 20:13:04,222 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 20:13:04,226 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 20:13:04,226 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 20:13:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 149 states have (on average 1.74496644295302) internal successors, (260), 150 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 20:13:04,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:04,248 INFO L512 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] [2021-08-25 20:13:04,249 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:04,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:04,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1180429726, now seen corresponding path program 1 times [2021-08-25 20:13:04,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:04,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545389636] [2021-08-25 20:13:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:04,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:04,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:04,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545389636] [2021-08-25 20:13:04,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545389636] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:04,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:04,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:04,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284931145] [2021-08-25 20:13:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:04,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:04,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:04,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:04,402 INFO L87 Difference]: Start difference. First operand has 151 states, 149 states have (on average 1.74496644295302) internal successors, (260), 150 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:04,546 INFO L93 Difference]: Finished difference Result 324 states and 556 transitions. [2021-08-25 20:13:04,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:04,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-25 20:13:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:04,554 INFO L225 Difference]: With dead ends: 324 [2021-08-25 20:13:04,555 INFO L226 Difference]: Without dead ends: 161 [2021-08-25 20:13:04,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-25 20:13:04,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2021-08-25 20:13:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5961538461538463) internal successors, (249), 156 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 249 transitions. [2021-08-25 20:13:04,591 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 249 transitions. Word has length 23 [2021-08-25 20:13:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:04,592 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 249 transitions. [2021-08-25 20:13:04,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 249 transitions. [2021-08-25 20:13:04,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:13:04,593 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:04,593 INFO L512 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] [2021-08-25 20:13:04,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 20:13:04,593 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:04,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:04,594 INFO L82 PathProgramCache]: Analyzing trace with hash -932054356, now seen corresponding path program 1 times [2021-08-25 20:13:04,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:04,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039286393] [2021-08-25 20:13:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:04,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:04,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:04,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039286393] [2021-08-25 20:13:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039286393] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:04,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:04,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:04,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269714812] [2021-08-25 20:13:04,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:04,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:04,642 INFO L87 Difference]: Start difference. First operand 157 states and 249 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:04,773 INFO L93 Difference]: Finished difference Result 331 states and 523 transitions. [2021-08-25 20:13:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:04,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 20:13:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:04,775 INFO L225 Difference]: With dead ends: 331 [2021-08-25 20:13:04,775 INFO L226 Difference]: Without dead ends: 182 [2021-08-25 20:13:04,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-25 20:13:04,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-08-25 20:13:04,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.5754189944134078) internal successors, (282), 179 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 282 transitions. [2021-08-25 20:13:04,790 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 282 transitions. Word has length 24 [2021-08-25 20:13:04,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:04,791 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 282 transitions. [2021-08-25 20:13:04,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 282 transitions. [2021-08-25 20:13:04,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:13:04,792 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:04,792 INFO L512 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] [2021-08-25 20:13:04,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 20:13:04,792 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash -945010985, now seen corresponding path program 1 times [2021-08-25 20:13:04,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:04,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081235617] [2021-08-25 20:13:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:04,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:04,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:04,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081235617] [2021-08-25 20:13:04,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081235617] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:04,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:04,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:04,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517245717] [2021-08-25 20:13:04,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:04,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:04,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:04,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:04,829 INFO L87 Difference]: Start difference. First operand 180 states and 282 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:04,926 INFO L93 Difference]: Finished difference Result 362 states and 567 transitions. [2021-08-25 20:13:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 20:13:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:04,928 INFO L225 Difference]: With dead ends: 362 [2021-08-25 20:13:04,928 INFO L226 Difference]: Without dead ends: 190 [2021-08-25 20:13:04,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-08-25 20:13:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2021-08-25 20:13:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5837837837837838) internal successors, (293), 185 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 293 transitions. [2021-08-25 20:13:04,936 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 293 transitions. Word has length 24 [2021-08-25 20:13:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:04,938 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 293 transitions. [2021-08-25 20:13:04,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 293 transitions. [2021-08-25 20:13:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-25 20:13:04,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:04,939 INFO L512 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] [2021-08-25 20:13:04,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 20:13:04,940 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:04,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1648361961, now seen corresponding path program 1 times [2021-08-25 20:13:04,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:04,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932178086] [2021-08-25 20:13:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:04,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:05,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:05,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932178086] [2021-08-25 20:13:05,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932178086] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:05,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:05,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:05,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886850133] [2021-08-25 20:13:05,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:05,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:05,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:05,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,013 INFO L87 Difference]: Start difference. First operand 186 states and 293 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:05,132 INFO L93 Difference]: Finished difference Result 367 states and 577 transitions. [2021-08-25 20:13:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:05,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-25 20:13:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:05,133 INFO L225 Difference]: With dead ends: 367 [2021-08-25 20:13:05,133 INFO L226 Difference]: Without dead ends: 189 [2021-08-25 20:13:05,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-08-25 20:13:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2021-08-25 20:13:05,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.5806451612903225) internal successors, (294), 186 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 294 transitions. [2021-08-25 20:13:05,140 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 294 transitions. Word has length 24 [2021-08-25 20:13:05,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:05,140 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 294 transitions. [2021-08-25 20:13:05,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,140 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 294 transitions. [2021-08-25 20:13:05,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 20:13:05,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:05,141 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:05,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 20:13:05,142 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash 688817562, now seen corresponding path program 1 times [2021-08-25 20:13:05,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:05,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098060316] [2021-08-25 20:13:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:05,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:05,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:05,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098060316] [2021-08-25 20:13:05,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098060316] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:05,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:05,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:05,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242383] [2021-08-25 20:13:05,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:05,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:05,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:05,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,172 INFO L87 Difference]: Start difference. First operand 187 states and 294 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:05,281 INFO L93 Difference]: Finished difference Result 378 states and 589 transitions. [2021-08-25 20:13:05,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:05,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-25 20:13:05,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:05,282 INFO L225 Difference]: With dead ends: 378 [2021-08-25 20:13:05,282 INFO L226 Difference]: Without dead ends: 199 [2021-08-25 20:13:05,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-25 20:13:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2021-08-25 20:13:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.5698924731182795) internal successors, (292), 186 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 292 transitions. [2021-08-25 20:13:05,292 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 292 transitions. Word has length 25 [2021-08-25 20:13:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:05,293 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 292 transitions. [2021-08-25 20:13:05,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 292 transitions. [2021-08-25 20:13:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 20:13:05,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:05,293 INFO L512 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] [2021-08-25 20:13:05,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-25 20:13:05,294 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:05,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:05,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1643637293, now seen corresponding path program 1 times [2021-08-25 20:13:05,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:05,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545783150] [2021-08-25 20:13:05,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:05,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:05,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:05,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545783150] [2021-08-25 20:13:05,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545783150] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:05,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:05,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:05,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145587522] [2021-08-25 20:13:05,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:05,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:05,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,322 INFO L87 Difference]: Start difference. First operand 187 states and 292 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:05,424 INFO L93 Difference]: Finished difference Result 378 states and 585 transitions. [2021-08-25 20:13:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-25 20:13:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:05,426 INFO L225 Difference]: With dead ends: 378 [2021-08-25 20:13:05,426 INFO L226 Difference]: Without dead ends: 199 [2021-08-25 20:13:05,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-25 20:13:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2021-08-25 20:13:05,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.5591397849462365) internal successors, (290), 186 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 290 transitions. [2021-08-25 20:13:05,432 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 290 transitions. Word has length 26 [2021-08-25 20:13:05,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:05,432 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 290 transitions. [2021-08-25 20:13:05,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 290 transitions. [2021-08-25 20:13:05,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:13:05,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:05,434 INFO L512 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] [2021-08-25 20:13:05,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 20:13:05,434 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:05,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:05,435 INFO L82 PathProgramCache]: Analyzing trace with hash 807002645, now seen corresponding path program 1 times [2021-08-25 20:13:05,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:05,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998034578] [2021-08-25 20:13:05,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:05,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:05,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:05,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998034578] [2021-08-25 20:13:05,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998034578] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:05,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:05,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:05,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773483461] [2021-08-25 20:13:05,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:05,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:05,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:05,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,462 INFO L87 Difference]: Start difference. First operand 187 states and 290 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:05,546 INFO L93 Difference]: Finished difference Result 378 states and 581 transitions. [2021-08-25 20:13:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:05,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-25 20:13:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:05,547 INFO L225 Difference]: With dead ends: 378 [2021-08-25 20:13:05,547 INFO L226 Difference]: Without dead ends: 199 [2021-08-25 20:13:05,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-25 20:13:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 187. [2021-08-25 20:13:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.5483870967741935) internal successors, (288), 186 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 288 transitions. [2021-08-25 20:13:05,552 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 288 transitions. Word has length 27 [2021-08-25 20:13:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:05,553 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 288 transitions. [2021-08-25 20:13:05,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 288 transitions. [2021-08-25 20:13:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:13:05,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:05,554 INFO L512 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] [2021-08-25 20:13:05,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-25 20:13:05,554 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash -583213996, now seen corresponding path program 1 times [2021-08-25 20:13:05,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:05,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141790215] [2021-08-25 20:13:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:05,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:05,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:05,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:05,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141790215] [2021-08-25 20:13:05,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141790215] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:05,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:05,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:05,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298625332] [2021-08-25 20:13:05,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:05,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:05,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:05,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,579 INFO L87 Difference]: Start difference. First operand 187 states and 288 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:05,595 INFO L93 Difference]: Finished difference Result 537 states and 823 transitions. [2021-08-25 20:13:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:05,596 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-25 20:13:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:05,597 INFO L225 Difference]: With dead ends: 537 [2021-08-25 20:13:05,597 INFO L226 Difference]: Without dead ends: 358 [2021-08-25 20:13:05,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-08-25 20:13:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 356. [2021-08-25 20:13:05,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.5295774647887324) internal successors, (543), 355 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 543 transitions. [2021-08-25 20:13:05,618 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 543 transitions. Word has length 27 [2021-08-25 20:13:05,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:05,619 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 543 transitions. [2021-08-25 20:13:05,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,619 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 543 transitions. [2021-08-25 20:13:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 20:13:05,619 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:05,620 INFO L512 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] [2021-08-25 20:13:05,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-25 20:13:05,620 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:05,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:05,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1263978570, now seen corresponding path program 1 times [2021-08-25 20:13:05,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:05,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708989776] [2021-08-25 20:13:05,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:05,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:05,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:05,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708989776] [2021-08-25 20:13:05,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708989776] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:05,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:05,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 20:13:05,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809517590] [2021-08-25 20:13:05,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 20:13:05,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:05,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 20:13:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-25 20:13:05,647 INFO L87 Difference]: Start difference. First operand 356 states and 543 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:05,831 INFO L93 Difference]: Finished difference Result 1100 states and 1680 transitions. [2021-08-25 20:13:05,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 20:13:05,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-25 20:13:05,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:05,834 INFO L225 Difference]: With dead ends: 1100 [2021-08-25 20:13:05,834 INFO L226 Difference]: Without dead ends: 753 [2021-08-25 20:13:05,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:05,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-08-25 20:13:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 599. [2021-08-25 20:13:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 1.5518394648829432) internal successors, (928), 598 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 928 transitions. [2021-08-25 20:13:05,850 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 928 transitions. Word has length 28 [2021-08-25 20:13:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:05,850 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 928 transitions. [2021-08-25 20:13:05,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 928 transitions. [2021-08-25 20:13:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-25 20:13:05,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:05,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:05,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 20:13:05,852 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:05,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash -737748410, now seen corresponding path program 1 times [2021-08-25 20:13:05,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:05,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871959750] [2021-08-25 20:13:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:05,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:05,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:05,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871959750] [2021-08-25 20:13:05,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871959750] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:05,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:05,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:05,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827464771] [2021-08-25 20:13:05,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:05,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:05,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:05,875 INFO L87 Difference]: Start difference. First operand 599 states and 928 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:06,002 INFO L93 Difference]: Finished difference Result 1331 states and 2092 transitions. [2021-08-25 20:13:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-25 20:13:06,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:06,005 INFO L225 Difference]: With dead ends: 1331 [2021-08-25 20:13:06,005 INFO L226 Difference]: Without dead ends: 741 [2021-08-25 20:13:06,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-08-25 20:13:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 721. [2021-08-25 20:13:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 1.5875) internal successors, (1143), 720 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1143 transitions. [2021-08-25 20:13:06,029 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1143 transitions. Word has length 42 [2021-08-25 20:13:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:06,029 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1143 transitions. [2021-08-25 20:13:06,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,030 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1143 transitions. [2021-08-25 20:13:06,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-25 20:13:06,031 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:06,031 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:06,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-25 20:13:06,031 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:06,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:06,031 INFO L82 PathProgramCache]: Analyzing trace with hash 948641384, now seen corresponding path program 1 times [2021-08-25 20:13:06,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:06,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939216188] [2021-08-25 20:13:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:06,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:06,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939216188] [2021-08-25 20:13:06,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939216188] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:06,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:06,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:06,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178757964] [2021-08-25 20:13:06,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:06,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:06,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,070 INFO L87 Difference]: Start difference. First operand 721 states and 1143 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:06,194 INFO L93 Difference]: Finished difference Result 1498 states and 2392 transitions. [2021-08-25 20:13:06,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:06,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-25 20:13:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:06,197 INFO L225 Difference]: With dead ends: 1498 [2021-08-25 20:13:06,197 INFO L226 Difference]: Without dead ends: 786 [2021-08-25 20:13:06,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-08-25 20:13:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 766. [2021-08-25 20:13:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 1.6052287581699347) internal successors, (1228), 765 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1228 transitions. [2021-08-25 20:13:06,227 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1228 transitions. Word has length 43 [2021-08-25 20:13:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:06,227 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1228 transitions. [2021-08-25 20:13:06,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1228 transitions. [2021-08-25 20:13:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-25 20:13:06,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:06,228 INFO L512 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] [2021-08-25 20:13:06,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-25 20:13:06,229 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:06,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:06,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2093549194, now seen corresponding path program 1 times [2021-08-25 20:13:06,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:06,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917917518] [2021-08-25 20:13:06,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:06,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:06,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:06,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917917518] [2021-08-25 20:13:06,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917917518] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:06,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:06,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:06,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998272573] [2021-08-25 20:13:06,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:06,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:06,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,252 INFO L87 Difference]: Start difference. First operand 766 states and 1228 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:06,269 INFO L93 Difference]: Finished difference Result 1523 states and 2443 transitions. [2021-08-25 20:13:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:06,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-25 20:13:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:06,272 INFO L225 Difference]: With dead ends: 1523 [2021-08-25 20:13:06,272 INFO L226 Difference]: Without dead ends: 766 [2021-08-25 20:13:06,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-08-25 20:13:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 766. [2021-08-25 20:13:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 766 states, 765 states have (on average 1.5830065359477123) internal successors, (1211), 765 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 1211 transitions. [2021-08-25 20:13:06,293 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 1211 transitions. Word has length 44 [2021-08-25 20:13:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:06,293 INFO L470 AbstractCegarLoop]: Abstraction has 766 states and 1211 transitions. [2021-08-25 20:13:06,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 1211 transitions. [2021-08-25 20:13:06,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-25 20:13:06,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:06,294 INFO L512 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] [2021-08-25 20:13:06,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-25 20:13:06,294 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:06,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:06,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1190502023, now seen corresponding path program 1 times [2021-08-25 20:13:06,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:06,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691507051] [2021-08-25 20:13:06,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:06,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:06,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691507051] [2021-08-25 20:13:06,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691507051] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:06,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:06,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:06,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220704322] [2021-08-25 20:13:06,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:06,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:06,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:06,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,314 INFO L87 Difference]: Start difference. First operand 766 states and 1211 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:06,342 INFO L93 Difference]: Finished difference Result 1537 states and 2426 transitions. [2021-08-25 20:13:06,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:06,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-25 20:13:06,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:06,345 INFO L225 Difference]: With dead ends: 1537 [2021-08-25 20:13:06,345 INFO L226 Difference]: Without dead ends: 780 [2021-08-25 20:13:06,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-08-25 20:13:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 778. [2021-08-25 20:13:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.555984555984556) internal successors, (1209), 777 states have internal predecessors, (1209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1209 transitions. [2021-08-25 20:13:06,372 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1209 transitions. Word has length 45 [2021-08-25 20:13:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:06,373 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 1209 transitions. [2021-08-25 20:13:06,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,373 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1209 transitions. [2021-08-25 20:13:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-25 20:13:06,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:06,374 INFO L512 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] [2021-08-25 20:13:06,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-25 20:13:06,374 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:06,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:06,375 INFO L82 PathProgramCache]: Analyzing trace with hash -881523047, now seen corresponding path program 1 times [2021-08-25 20:13:06,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:06,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690756575] [2021-08-25 20:13:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:06,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:06,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690756575] [2021-08-25 20:13:06,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690756575] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:06,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:06,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:06,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4237701] [2021-08-25 20:13:06,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:06,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,403 INFO L87 Difference]: Start difference. First operand 778 states and 1209 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:06,435 INFO L93 Difference]: Finished difference Result 2299 states and 3573 transitions. [2021-08-25 20:13:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:06,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-25 20:13:06,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:06,440 INFO L225 Difference]: With dead ends: 2299 [2021-08-25 20:13:06,440 INFO L226 Difference]: Without dead ends: 1530 [2021-08-25 20:13:06,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2021-08-25 20:13:06,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1218. [2021-08-25 20:13:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 1.5488907148726376) internal successors, (1885), 1217 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1885 transitions. [2021-08-25 20:13:06,477 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1885 transitions. Word has length 50 [2021-08-25 20:13:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:06,477 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1885 transitions. [2021-08-25 20:13:06,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1885 transitions. [2021-08-25 20:13:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-25 20:13:06,479 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:06,479 INFO L512 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] [2021-08-25 20:13:06,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-25 20:13:06,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:06,479 INFO L82 PathProgramCache]: Analyzing trace with hash 11963291, now seen corresponding path program 1 times [2021-08-25 20:13:06,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:06,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200128729] [2021-08-25 20:13:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:06,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:06,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200128729] [2021-08-25 20:13:06,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200128729] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:06,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:06,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:06,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606612235] [2021-08-25 20:13:06,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:06,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:06,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,522 INFO L87 Difference]: Start difference. First operand 1218 states and 1885 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:06,673 INFO L93 Difference]: Finished difference Result 2639 states and 4073 transitions. [2021-08-25 20:13:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-25 20:13:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:06,678 INFO L225 Difference]: With dead ends: 2639 [2021-08-25 20:13:06,678 INFO L226 Difference]: Without dead ends: 1431 [2021-08-25 20:13:06,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-08-25 20:13:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1325. [2021-08-25 20:13:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 1.5105740181268883) internal successors, (2000), 1324 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2000 transitions. [2021-08-25 20:13:06,716 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2000 transitions. Word has length 50 [2021-08-25 20:13:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:06,717 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 2000 transitions. [2021-08-25 20:13:06,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2000 transitions. [2021-08-25 20:13:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-25 20:13:06,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:06,718 INFO L512 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] [2021-08-25 20:13:06,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-25 20:13:06,719 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash 776292063, now seen corresponding path program 1 times [2021-08-25 20:13:06,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:06,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716001860] [2021-08-25 20:13:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-25 20:13:06,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:06,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716001860] [2021-08-25 20:13:06,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716001860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:06,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:06,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:06,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225693890] [2021-08-25 20:13:06,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:06,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:06,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:06,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,746 INFO L87 Difference]: Start difference. First operand 1325 states and 2000 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:06,885 INFO L93 Difference]: Finished difference Result 2808 states and 4234 transitions. [2021-08-25 20:13:06,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:06,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-25 20:13:06,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:06,890 INFO L225 Difference]: With dead ends: 2808 [2021-08-25 20:13:06,890 INFO L226 Difference]: Without dead ends: 1493 [2021-08-25 20:13:06,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-08-25 20:13:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1451. [2021-08-25 20:13:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1450 states have (on average 1.4737931034482759) internal successors, (2137), 1450 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 2137 transitions. [2021-08-25 20:13:06,924 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 2137 transitions. Word has length 55 [2021-08-25 20:13:06,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:06,925 INFO L470 AbstractCegarLoop]: Abstraction has 1451 states and 2137 transitions. [2021-08-25 20:13:06,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 2137 transitions. [2021-08-25 20:13:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-25 20:13:06,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:06,927 INFO L512 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] [2021-08-25 20:13:06,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-25 20:13:06,927 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:06,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:06,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1456350433, now seen corresponding path program 1 times [2021-08-25 20:13:06,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:06,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759469333] [2021-08-25 20:13:06,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-08-25 20:13:06,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759469333] [2021-08-25 20:13:06,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759469333] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:06,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:06,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:06,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018628569] [2021-08-25 20:13:06,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:06,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:06,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:06,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,947 INFO L87 Difference]: Start difference. First operand 1451 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:06,989 INFO L93 Difference]: Finished difference Result 2739 states and 4009 transitions. [2021-08-25 20:13:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:06,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-25 20:13:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:06,994 INFO L225 Difference]: With dead ends: 2739 [2021-08-25 20:13:06,994 INFO L226 Difference]: Without dead ends: 1828 [2021-08-25 20:13:06,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:06,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-08-25 20:13:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1313. [2021-08-25 20:13:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 1.4626524390243902) internal successors, (1919), 1312 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:07,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 1919 transitions. [2021-08-25 20:13:07,035 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 1919 transitions. Word has length 55 [2021-08-25 20:13:07,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:07,036 INFO L470 AbstractCegarLoop]: Abstraction has 1313 states and 1919 transitions. [2021-08-25 20:13:07,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:07,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 1919 transitions. [2021-08-25 20:13:07,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-25 20:13:07,037 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:07,038 INFO L512 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] [2021-08-25 20:13:07,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-25 20:13:07,038 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:07,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:07,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1301716177, now seen corresponding path program 1 times [2021-08-25 20:13:07,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:07,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297794564] [2021-08-25 20:13:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:07,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:07,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:13:07,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:07,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297794564] [2021-08-25 20:13:07,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297794564] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:07,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:13:07,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:13:07,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180294595] [2021-08-25 20:13:07,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:07,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:07,069 INFO L87 Difference]: Start difference. First operand 1313 states and 1919 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:07,118 INFO L93 Difference]: Finished difference Result 3800 states and 5511 transitions. [2021-08-25 20:13:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-25 20:13:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:07,125 INFO L225 Difference]: With dead ends: 3800 [2021-08-25 20:13:07,125 INFO L226 Difference]: Without dead ends: 2497 [2021-08-25 20:13:07,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:13:07,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-08-25 20:13:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 2495. [2021-08-25 20:13:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 2494 states have (on average 1.4322373696872495) internal successors, (3572), 2494 states have internal predecessors, (3572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:07,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 3572 transitions. [2021-08-25 20:13:07,197 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 3572 transitions. Word has length 56 [2021-08-25 20:13:07,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:07,197 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 3572 transitions. [2021-08-25 20:13:07,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:07,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 3572 transitions. [2021-08-25 20:13:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-25 20:13:07,201 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:07,201 INFO L512 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] [2021-08-25 20:13:07,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-25 20:13:07,201 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:07,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:07,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1196163616, now seen corresponding path program 1 times [2021-08-25 20:13:07,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:07,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491406818] [2021-08-25 20:13:07,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:07,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 20:13:07,210 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 20:13:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 20:13:07,238 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 20:13:07,238 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 20:13:07,239 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 20:13:07,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-25 20:13:07,244 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 20:13:07,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 08:13:07 BoogieIcfgContainer [2021-08-25 20:13:07,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 20:13:07,293 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 20:13:07,293 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 20:13:07,293 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 20:13:07,293 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:13:04" (3/4) ... [2021-08-25 20:13:07,295 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 20:13:07,347 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 20:13:07,348 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 20:13:07,349 INFO L168 Benchmark]: Toolchain (without parser) took 4288.54 ms. Allocated memory was 60.8 MB in the beginning and 159.4 MB in the end (delta: 98.6 MB). Free memory was 38.8 MB in the beginning and 81.3 MB in the end (delta: -42.5 MB). Peak memory consumption was 56.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:07,349 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 41.2 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:13:07,350 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.57 ms. Allocated memory is still 60.8 MB. Free memory was 38.6 MB in the beginning and 41.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:07,350 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.26 ms. Allocated memory is still 60.8 MB. Free memory was 41.2 MB in the beginning and 38.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:07,350 INFO L168 Benchmark]: Boogie Preprocessor took 45.29 ms. Allocated memory is still 60.8 MB. Free memory was 38.4 MB in the beginning and 36.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:07,350 INFO L168 Benchmark]: RCFGBuilder took 676.17 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 36.1 MB in the beginning and 31.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:07,351 INFO L168 Benchmark]: TraceAbstraction took 3117.09 ms. Allocated memory was 73.4 MB in the beginning and 159.4 MB in the end (delta: 86.0 MB). Free memory was 53.7 MB in the beginning and 89.7 MB in the end (delta: -36.0 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:07,351 INFO L168 Benchmark]: Witness Printer took 54.81 ms. Allocated memory is still 159.4 MB. Free memory was 89.7 MB in the beginning and 81.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:07,352 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 41.2 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 322.57 ms. Allocated memory is still 60.8 MB. Free memory was 38.6 MB in the beginning and 41.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.26 ms. Allocated memory is still 60.8 MB. Free memory was 41.2 MB in the beginning and 38.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.29 ms. Allocated memory is still 60.8 MB. Free memory was 38.4 MB in the beginning and 36.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 676.17 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 36.1 MB in the beginning and 31.3 MB in the end (delta: 4.7 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3117.09 ms. Allocated memory was 73.4 MB in the beginning and 159.4 MB in the end (delta: 86.0 MB). Free memory was 53.7 MB in the beginning and 89.7 MB in the end (delta: -36.0 MB). Peak memory consumption was 49.4 MB. Max. memory is 16.1 GB. * Witness Printer took 54.81 ms. Allocated memory is still 159.4 MB. Free memory was 89.7 MB in the beginning and 81.3 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: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 642]: a call to reach_error is reachable a call to reach_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 [L642] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 151 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3021.7ms, OverallIterations: 19, TraceHistogramMax: 2, EmptinessCheckTime: 27.0ms, AutomataDifference: 1805.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3676 SDtfs, 3347 SDslu, 1453 SDs, 0 SdLazy, 1205 SolverSat, 447 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 935.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2495occurred in iteration=18, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 417.2ms AutomataMinimizationTime, 18 MinimizatonAttempts, 1223 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.5ms SsaConstructionTime, 136.7ms SatisfiabilityAnalysisTime, 385.1ms InterpolantComputationTime, 725 NumberOfCodeBlocks, 725 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 650 ConstructedInterpolants, 0 QuantifiedInterpolants, 1855 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! [2021-08-25 20:13:07,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...