./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl-simplified/s3_srvr_1.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8d31f386 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_1.cil-1.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 a3bbefcee290f98530e25ab3f5cc4cda5aa0150b .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-wip.dd.multireach-323-8d31f38 [2021-07-04 18:05:29,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-04 18:05:29,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-04 18:05:29,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-04 18:05:29,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-04 18:05:29,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-04 18:05:29,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-04 18:05:29,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-04 18:05:29,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-04 18:05:29,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-04 18:05:29,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-04 18:05:29,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-04 18:05:29,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-04 18:05:29,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-04 18:05:29,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-04 18:05:29,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-04 18:05:29,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-04 18:05:29,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-04 18:05:29,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-04 18:05:29,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-04 18:05:29,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-04 18:05:29,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-04 18:05:29,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-04 18:05:29,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-04 18:05:29,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-04 18:05:29,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-04 18:05:29,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-04 18:05:29,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-04 18:05:29,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-04 18:05:29,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-04 18:05:29,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-04 18:05:29,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-04 18:05:29,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-04 18:05:29,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-04 18:05:29,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-04 18:05:29,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-04 18:05:29,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-04 18:05:29,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-04 18:05:29,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-04 18:05:29,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-04 18:05:29,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-04 18:05:29,345 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-07-04 18:05:29,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-04 18:05:29,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-04 18:05:29,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-04 18:05:29,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-04 18:05:29,375 INFO L138 SettingsManager]: * Use SBE=true [2021-07-04 18:05:29,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-04 18:05:29,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-04 18:05:29,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-04 18:05:29,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-04 18:05:29,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-04 18:05:29,377 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-04 18:05:29,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-04 18:05:29,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-04 18:05:29,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-04 18:05:29,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-04 18:05:29,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-04 18:05:29,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-04 18:05:29,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-04 18:05:29,378 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-04 18:05:29,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-04 18:05:29,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 18:05:29,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-04 18:05:29,379 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-04 18:05:29,379 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-04 18:05:29,379 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-04 18:05:29,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-04 18:05:29,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-04 18:05:29,379 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-04 18:05:29,379 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3bbefcee290f98530e25ab3f5cc4cda5aa0150b [2021-07-04 18:05:29,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-04 18:05:29,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-04 18:05:29,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-04 18:05:29,673 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-04 18:05:29,674 INFO L275 PluginConnector]: CDTParser initialized [2021-07-04 18:05:29,675 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl-simplified/s3_srvr_1.cil-1.c [2021-07-04 18:05:29,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ecc0ab65/11bfb219acfa4534b447d8e94569e097/FLAG79daed57b [2021-07-04 18:05:30,212 INFO L306 CDTParser]: Found 1 translation units. [2021-07-04 18:05:30,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_1.cil-1.c [2021-07-04 18:05:30,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ecc0ab65/11bfb219acfa4534b447d8e94569e097/FLAG79daed57b [2021-07-04 18:05:30,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ecc0ab65/11bfb219acfa4534b447d8e94569e097 [2021-07-04 18:05:30,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-04 18:05:30,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-04 18:05:30,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-04 18:05:30,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-04 18:05:30,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-04 18:05:30,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:30,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66a824da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30, skipping insertion in model container [2021-07-04 18:05:30,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:30,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-04 18:05:30,663 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-04 18:05:30,906 WARN L224 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_1.cil-1.c[42831,42844] [2021-07-04 18:05:30,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 18:05:30,916 INFO L203 MainTranslator]: Completed pre-run [2021-07-04 18:05:30,962 WARN L224 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_1.cil-1.c[42831,42844] [2021-07-04 18:05:30,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-04 18:05:30,981 INFO L208 MainTranslator]: Completed translation [2021-07-04 18:05:30,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30 WrapperNode [2021-07-04 18:05:30,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-04 18:05:30,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-04 18:05:30,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-04 18:05:30,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-04 18:05:30,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-04 18:05:31,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-04 18:05:31,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-04 18:05:31,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-04 18:05:31,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-04 18:05:31,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-04 18:05:31,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-04 18:05:31,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-04 18:05:31,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (1/1) ... [2021-07-04 18:05:31,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-04 18:05:31,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-04 18:05:31,103 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) [2021-07-04 18:05:31,121 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 [2021-07-04 18:05:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-04 18:05:31,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-04 18:05:31,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-04 18:05:31,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-04 18:05:31,327 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-07-04 18:05:31,763 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-07-04 18:05:31,764 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-07-04 18:05:31,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-04 18:05:31,769 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-07-04 18:05:31,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:05:31 BoogieIcfgContainer [2021-07-04 18:05:31,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-04 18:05:31,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-04 18:05:31,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-04 18:05:31,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-04 18:05:31,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.07 06:05:30" (1/3) ... [2021-07-04 18:05:31,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af724c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 06:05:31, skipping insertion in model container [2021-07-04 18:05:31,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.07 06:05:30" (2/3) ... [2021-07-04 18:05:31,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2af724c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.07 06:05:31, skipping insertion in model container [2021-07-04 18:05:31,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:05:31" (3/3) ... [2021-07-04 18:05:31,785 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1.cil-1.c [2021-07-04 18:05:31,790 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-04 18:05:31,790 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-04 18:05:31,827 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION ======== [2021-07-04 18:05:31,831 INFO L329 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, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-04 18:05:31,832 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-04 18:05:31,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 143 states, 141 states have (on average 1.7163120567375887) internal successors, (242), 142 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-07-04 18:05:31,858 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:31,859 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:31,859 INFO L374 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:31,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:31,865 INFO L82 PathProgramCache]: Analyzing trace with hash -947483198, now seen corresponding path program 1 times [2021-07-04 18:05:31,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:31,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787093858] [2021-07-04 18:05:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:31,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:32,043 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,044 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:32,044 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:32,058 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,059 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:05:32,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:32,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787093858] [2021-07-04 18:05:32,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787093858] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:32,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:32,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:32,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081638451] [2021-07-04 18:05:32,065 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:32,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:32,075 INFO L87 Difference]: Start difference. First operand has 143 states, 141 states have (on average 1.7163120567375887) internal successors, (242), 142 states have internal predecessors, (242), 0 states have call successors, (0), 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 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) [2021-07-04 18:05:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:32,331 INFO L93 Difference]: Finished difference Result 333 states and 570 transitions. [2021-07-04 18:05:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:32,332 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 [2021-07-04 18:05:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:32,344 INFO L225 Difference]: With dead ends: 333 [2021-07-04 18:05:32,344 INFO L226 Difference]: Without dead ends: 178 [2021-07-04 18:05:32,347 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-04 18:05:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2021-07-04 18:05:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.6257309941520468) internal successors, (278), 171 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 278 transitions. [2021-07-04 18:05:32,398 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 278 transitions. Word has length 45 [2021-07-04 18:05:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:32,398 INFO L442 AbstractCegarLoop]: Abstraction has 172 states and 278 transitions. [2021-07-04 18:05:32,399 INFO L443 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) [2021-07-04 18:05:32,399 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 278 transitions. [2021-07-04 18:05:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-07-04 18:05:32,403 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:32,403 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:32,404 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-04 18:05:32,404 INFO L374 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:32,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:32,406 INFO L82 PathProgramCache]: Analyzing trace with hash 472840096, now seen corresponding path program 1 times [2021-07-04 18:05:32,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:32,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894886423] [2021-07-04 18:05:32,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:32,406 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:32,474 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:32,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:32,480 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:32,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:05:32,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:32,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894886423] [2021-07-04 18:05:32,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894886423] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:32,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:32,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:32,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045982483] [2021-07-04 18:05:32,485 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:32,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:32,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:32,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:32,487 INFO L87 Difference]: Start difference. First operand 172 states and 278 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:32,664 INFO L93 Difference]: Finished difference Result 385 states and 632 transitions. [2021-07-04 18:05:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:32,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-07-04 18:05:32,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:32,675 INFO L225 Difference]: With dead ends: 385 [2021-07-04 18:05:32,675 INFO L226 Difference]: Without dead ends: 219 [2021-07-04 18:05:32,678 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:32,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-07-04 18:05:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2021-07-04 18:05:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.6745283018867925) internal successors, (355), 212 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 355 transitions. [2021-07-04 18:05:32,692 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 355 transitions. Word has length 46 [2021-07-04 18:05:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:32,693 INFO L442 AbstractCegarLoop]: Abstraction has 213 states and 355 transitions. [2021-07-04 18:05:32,693 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 355 transitions. [2021-07-04 18:05:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-07-04 18:05:32,694 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:32,695 INFO L525 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:32,695 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-04 18:05:32,695 INFO L374 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:32,695 INFO L82 PathProgramCache]: Analyzing trace with hash 488183924, now seen corresponding path program 1 times [2021-07-04 18:05:32,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:32,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697794533] [2021-07-04 18:05:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:32,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:32,727 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:32,728 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,728 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:32,731 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,731 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:05:32,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:32,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697794533] [2021-07-04 18:05:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697794533] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:32,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:32,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:32,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779196262] [2021-07-04 18:05:32,734 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:32,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:32,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:32,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:32,735 INFO L87 Difference]: Start difference. First operand 213 states and 355 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:32,856 INFO L93 Difference]: Finished difference Result 449 states and 756 transitions. [2021-07-04 18:05:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:32,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-07-04 18:05:32,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:32,858 INFO L225 Difference]: With dead ends: 449 [2021-07-04 18:05:32,858 INFO L226 Difference]: Without dead ends: 244 [2021-07-04 18:05:32,859 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-07-04 18:05:32,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-07-04 18:05:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.691358024691358) internal successors, (411), 243 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 411 transitions. [2021-07-04 18:05:32,865 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 411 transitions. Word has length 74 [2021-07-04 18:05:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:32,865 INFO L442 AbstractCegarLoop]: Abstraction has 244 states and 411 transitions. [2021-07-04 18:05:32,866 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 411 transitions. [2021-07-04 18:05:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-07-04 18:05:32,867 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:32,867 INFO L525 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:32,867 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-04 18:05:32,868 INFO L374 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:32,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1651483739, now seen corresponding path program 1 times [2021-07-04 18:05:32,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:32,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527490932] [2021-07-04 18:05:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:32,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:32,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:32,934 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:32,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:32,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:05:32,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:32,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527490932] [2021-07-04 18:05:32,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527490932] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:32,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:32,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:32,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845150478] [2021-07-04 18:05:32,938 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:32,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:32,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:32,938 INFO L87 Difference]: Start difference. First operand 244 states and 411 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:33,095 INFO L93 Difference]: Finished difference Result 526 states and 892 transitions. [2021-07-04 18:05:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-07-04 18:05:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:33,097 INFO L225 Difference]: With dead ends: 526 [2021-07-04 18:05:33,097 INFO L226 Difference]: Without dead ends: 290 [2021-07-04 18:05:33,098 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-07-04 18:05:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 286. [2021-07-04 18:05:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.7052631578947368) internal successors, (486), 285 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 486 transitions. [2021-07-04 18:05:33,108 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 486 transitions. Word has length 85 [2021-07-04 18:05:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:33,109 INFO L442 AbstractCegarLoop]: Abstraction has 286 states and 486 transitions. [2021-07-04 18:05:33,109 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 486 transitions. [2021-07-04 18:05:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-04 18:05:33,111 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:33,111 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:33,111 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-04 18:05:33,111 INFO L374 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:33,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1358393014, now seen corresponding path program 1 times [2021-07-04 18:05:33,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:33,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119349177] [2021-07-04 18:05:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:33,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:33,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:33,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-04 18:05:33,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:33,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119349177] [2021-07-04 18:05:33,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119349177] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:33,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:33,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:33,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634127806] [2021-07-04 18:05:33,174 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:33,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:33,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:33,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,176 INFO L87 Difference]: Start difference. First operand 286 states and 486 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:33,275 INFO L93 Difference]: Finished difference Result 581 states and 988 transitions. [2021-07-04 18:05:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:33,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-04 18:05:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:33,277 INFO L225 Difference]: With dead ends: 581 [2021-07-04 18:05:33,277 INFO L226 Difference]: Without dead ends: 303 [2021-07-04 18:05:33,278 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-04 18:05:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2021-07-04 18:05:33,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.6933333333333334) internal successors, (508), 300 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 508 transitions. [2021-07-04 18:05:33,283 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 508 transitions. Word has length 86 [2021-07-04 18:05:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:33,283 INFO L442 AbstractCegarLoop]: Abstraction has 301 states and 508 transitions. [2021-07-04 18:05:33,283 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 508 transitions. [2021-07-04 18:05:33,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-07-04 18:05:33,284 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:33,284 INFO L525 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:33,285 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-04 18:05:33,285 INFO L374 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:33,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:33,285 INFO L82 PathProgramCache]: Analyzing trace with hash 709328611, now seen corresponding path program 1 times [2021-07-04 18:05:33,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:33,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976909265] [2021-07-04 18:05:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:33,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:33,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,307 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,308 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:33,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-04 18:05:33,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:33,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976909265] [2021-07-04 18:05:33,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976909265] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:33,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:33,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:33,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516111977] [2021-07-04 18:05:33,312 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:33,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:33,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:33,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,313 INFO L87 Difference]: Start difference. First operand 301 states and 508 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:33,446 INFO L93 Difference]: Finished difference Result 598 states and 1009 transitions. [2021-07-04 18:05:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:33,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-07-04 18:05:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:33,448 INFO L225 Difference]: With dead ends: 598 [2021-07-04 18:05:33,448 INFO L226 Difference]: Without dead ends: 303 [2021-07-04 18:05:33,448 INFO L795 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 [2021-07-04 18:05:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-07-04 18:05:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 299. [2021-07-04 18:05:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.6879194630872483) internal successors, (503), 298 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 503 transitions. [2021-07-04 18:05:33,454 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 503 transitions. Word has length 86 [2021-07-04 18:05:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:33,455 INFO L442 AbstractCegarLoop]: Abstraction has 299 states and 503 transitions. [2021-07-04 18:05:33,455 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 503 transitions. [2021-07-04 18:05:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-07-04 18:05:33,456 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:33,456 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:33,456 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-04 18:05:33,456 INFO L374 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash 564851953, now seen corresponding path program 1 times [2021-07-04 18:05:33,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:33,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307066169] [2021-07-04 18:05:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:33,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:33,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,472 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:33,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,475 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-04 18:05:33,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:33,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307066169] [2021-07-04 18:05:33,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307066169] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:33,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:33,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:33,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822370255] [2021-07-04 18:05:33,476 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:33,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:33,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:33,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,477 INFO L87 Difference]: Start difference. First operand 299 states and 503 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:33,561 INFO L93 Difference]: Finished difference Result 592 states and 996 transitions. [2021-07-04 18:05:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:33,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-07-04 18:05:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:33,563 INFO L225 Difference]: With dead ends: 592 [2021-07-04 18:05:33,563 INFO L226 Difference]: Without dead ends: 301 [2021-07-04 18:05:33,564 INFO L795 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 [2021-07-04 18:05:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-07-04 18:05:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2021-07-04 18:05:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.674496644295302) internal successors, (499), 298 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 499 transitions. [2021-07-04 18:05:33,570 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 499 transitions. Word has length 87 [2021-07-04 18:05:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:33,570 INFO L442 AbstractCegarLoop]: Abstraction has 299 states and 499 transitions. [2021-07-04 18:05:33,570 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 499 transitions. [2021-07-04 18:05:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-04 18:05:33,571 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:33,571 INFO L525 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:33,572 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-04 18:05:33,572 INFO L374 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:33,572 INFO L82 PathProgramCache]: Analyzing trace with hash 19025617, now seen corresponding path program 1 times [2021-07-04 18:05:33,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:33,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171328308] [2021-07-04 18:05:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:33,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:33,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,587 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:33,590 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-07-04 18:05:33,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:33,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171328308] [2021-07-04 18:05:33,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171328308] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:33,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:33,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:33,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65851232] [2021-07-04 18:05:33,592 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:33,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:33,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,592 INFO L87 Difference]: Start difference. First operand 299 states and 499 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:33,684 INFO L93 Difference]: Finished difference Result 599 states and 998 transitions. [2021-07-04 18:05:33,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:33,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-07-04 18:05:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:33,687 INFO L225 Difference]: With dead ends: 599 [2021-07-04 18:05:33,687 INFO L226 Difference]: Without dead ends: 308 [2021-07-04 18:05:33,688 INFO L795 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 [2021-07-04 18:05:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-07-04 18:05:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2021-07-04 18:05:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.6449511400651466) internal successors, (505), 307 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 505 transitions. [2021-07-04 18:05:33,697 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 505 transitions. Word has length 100 [2021-07-04 18:05:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:33,697 INFO L442 AbstractCegarLoop]: Abstraction has 308 states and 505 transitions. [2021-07-04 18:05:33,698 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 505 transitions. [2021-07-04 18:05:33,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-07-04 18:05:33,698 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:33,699 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:33,699 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-04 18:05:33,699 INFO L374 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:33,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1778247501, now seen corresponding path program 1 times [2021-07-04 18:05:33,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:33,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538267448] [2021-07-04 18:05:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:33,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:33,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:33,721 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,722 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-04 18:05:33,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:33,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538267448] [2021-07-04 18:05:33,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538267448] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:33,722 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:33,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:33,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882825061] [2021-07-04 18:05:33,723 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:33,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:33,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:33,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,724 INFO L87 Difference]: Start difference. First operand 308 states and 505 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:33,823 INFO L93 Difference]: Finished difference Result 639 states and 1051 transitions. [2021-07-04 18:05:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:33,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-07-04 18:05:33,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:33,825 INFO L225 Difference]: With dead ends: 639 [2021-07-04 18:05:33,825 INFO L226 Difference]: Without dead ends: 339 [2021-07-04 18:05:33,826 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-04 18:05:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2021-07-04 18:05:33,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.6428571428571428) internal successors, (552), 336 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 552 transitions. [2021-07-04 18:05:33,832 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 552 transitions. Word has length 100 [2021-07-04 18:05:33,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:33,833 INFO L442 AbstractCegarLoop]: Abstraction has 337 states and 552 transitions. [2021-07-04 18:05:33,833 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 552 transitions. [2021-07-04 18:05:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-07-04 18:05:33,834 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:33,834 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:33,834 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-04 18:05:33,834 INFO L374 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:33,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1388103916, now seen corresponding path program 1 times [2021-07-04 18:05:33,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:33,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917834748] [2021-07-04 18:05:33,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:33,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:33,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,848 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:33,850 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:33,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-04 18:05:33,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:33,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917834748] [2021-07-04 18:05:33,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917834748] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:33,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:33,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:33,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278871860] [2021-07-04 18:05:33,852 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:33,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:33,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:33,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:33,853 INFO L87 Difference]: Start difference. First operand 337 states and 552 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:33,964 INFO L93 Difference]: Finished difference Result 668 states and 1094 transitions. [2021-07-04 18:05:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-07-04 18:05:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:33,965 INFO L225 Difference]: With dead ends: 668 [2021-07-04 18:05:33,966 INFO L226 Difference]: Without dead ends: 339 [2021-07-04 18:05:33,966 INFO L795 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 [2021-07-04 18:05:33,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-07-04 18:05:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 337. [2021-07-04 18:05:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 1.630952380952381) internal successors, (548), 336 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 548 transitions. [2021-07-04 18:05:33,974 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 548 transitions. Word has length 101 [2021-07-04 18:05:33,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:33,974 INFO L442 AbstractCegarLoop]: Abstraction has 337 states and 548 transitions. [2021-07-04 18:05:33,974 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 548 transitions. [2021-07-04 18:05:33,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-07-04 18:05:33,975 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:33,975 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:33,976 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-04 18:05:33,976 INFO L374 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:33,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:33,976 INFO L82 PathProgramCache]: Analyzing trace with hash -916073731, now seen corresponding path program 1 times [2021-07-04 18:05:33,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:33,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271396616] [2021-07-04 18:05:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:33,977 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:34,003 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,004 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,004 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:34,006 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,006 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-04 18:05:34,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:34,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271396616] [2021-07-04 18:05:34,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271396616] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:34,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:34,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:34,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485090316] [2021-07-04 18:05:34,008 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:34,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:34,008 INFO L87 Difference]: Start difference. First operand 337 states and 548 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:34,106 INFO L93 Difference]: Finished difference Result 701 states and 1144 transitions. [2021-07-04 18:05:34,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:34,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-07-04 18:05:34,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:34,107 INFO L225 Difference]: With dead ends: 701 [2021-07-04 18:05:34,108 INFO L226 Difference]: Without dead ends: 372 [2021-07-04 18:05:34,108 INFO L795 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 [2021-07-04 18:05:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-04 18:05:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 364. [2021-07-04 18:05:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.6253443526170799) internal successors, (590), 363 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 590 transitions. [2021-07-04 18:05:34,115 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 590 transitions. Word has length 102 [2021-07-04 18:05:34,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:34,116 INFO L442 AbstractCegarLoop]: Abstraction has 364 states and 590 transitions. [2021-07-04 18:05:34,116 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 590 transitions. [2021-07-04 18:05:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-07-04 18:05:34,117 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:34,117 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:34,117 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-04 18:05:34,117 INFO L374 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash 62624868, now seen corresponding path program 1 times [2021-07-04 18:05:34,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:34,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656862405] [2021-07-04 18:05:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:34,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:34,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,131 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:34,146 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,147 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-04 18:05:34,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:34,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656862405] [2021-07-04 18:05:34,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656862405] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:34,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:34,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:34,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155163153] [2021-07-04 18:05:34,148 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:34,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:34,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:34,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:34,149 INFO L87 Difference]: Start difference. First operand 364 states and 590 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:34,305 INFO L93 Difference]: Finished difference Result 728 states and 1181 transitions. [2021-07-04 18:05:34,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:34,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-07-04 18:05:34,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:34,307 INFO L225 Difference]: With dead ends: 728 [2021-07-04 18:05:34,308 INFO L226 Difference]: Without dead ends: 372 [2021-07-04 18:05:34,308 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-07-04 18:05:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 364. [2021-07-04 18:05:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.6115702479338843) internal successors, (585), 363 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 585 transitions. [2021-07-04 18:05:34,317 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 585 transitions. Word has length 103 [2021-07-04 18:05:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:34,317 INFO L442 AbstractCegarLoop]: Abstraction has 364 states and 585 transitions. [2021-07-04 18:05:34,317 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 585 transitions. [2021-07-04 18:05:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-07-04 18:05:34,318 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:34,319 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:34,319 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-04 18:05:34,319 INFO L374 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1773852357, now seen corresponding path program 1 times [2021-07-04 18:05:34,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:34,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780683930] [2021-07-04 18:05:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:34,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:34,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:34,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-04 18:05:34,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:34,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780683930] [2021-07-04 18:05:34,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780683930] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:34,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:34,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:34,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431574773] [2021-07-04 18:05:34,338 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:34,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:34,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:34,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:34,339 INFO L87 Difference]: Start difference. First operand 364 states and 585 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:34,433 INFO L93 Difference]: Finished difference Result 745 states and 1199 transitions. [2021-07-04 18:05:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:34,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 106 [2021-07-04 18:05:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:34,434 INFO L225 Difference]: With dead ends: 745 [2021-07-04 18:05:34,435 INFO L226 Difference]: Without dead ends: 389 [2021-07-04 18:05:34,435 INFO L795 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 [2021-07-04 18:05:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-04 18:05:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2021-07-04 18:05:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5989583333333333) internal successors, (614), 384 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 614 transitions. [2021-07-04 18:05:34,443 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 614 transitions. Word has length 106 [2021-07-04 18:05:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:34,443 INFO L442 AbstractCegarLoop]: Abstraction has 385 states and 614 transitions. [2021-07-04 18:05:34,444 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 614 transitions. [2021-07-04 18:05:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-07-04 18:05:34,445 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:34,445 INFO L525 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:34,445 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-04 18:05:34,445 INFO L374 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1450939714, now seen corresponding path program 1 times [2021-07-04 18:05:34,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:34,446 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612287180] [2021-07-04 18:05:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:34,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:34,458 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,458 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,459 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-07-04 18:05:34,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-04 18:05:34,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:34,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612287180] [2021-07-04 18:05:34,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612287180] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:34,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:34,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:34,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428881331] [2021-07-04 18:05:34,462 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:34,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:34,463 INFO L87 Difference]: Start difference. First operand 385 states and 614 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:34,570 INFO L93 Difference]: Finished difference Result 766 states and 1222 transitions. [2021-07-04 18:05:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:34,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 107 [2021-07-04 18:05:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:34,571 INFO L225 Difference]: With dead ends: 766 [2021-07-04 18:05:34,572 INFO L226 Difference]: Without dead ends: 389 [2021-07-04 18:05:34,572 INFO L795 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 [2021-07-04 18:05:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-07-04 18:05:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 385. [2021-07-04 18:05:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5833333333333333) internal successors, (608), 384 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 608 transitions. [2021-07-04 18:05:34,581 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 608 transitions. Word has length 107 [2021-07-04 18:05:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:34,581 INFO L442 AbstractCegarLoop]: Abstraction has 385 states and 608 transitions. [2021-07-04 18:05:34,581 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 608 transitions. [2021-07-04 18:05:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-07-04 18:05:34,582 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:34,582 INFO L525 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:34,582 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-04 18:05:34,582 INFO L374 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:34,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:34,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1044207465, now seen corresponding path program 1 times [2021-07-04 18:05:34,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:34,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244482325] [2021-07-04 18:05:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:34,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-04 18:05:34,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,599 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-04 18:05:34,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-04 18:05:34,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-04 18:05:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-07-04 18:05:34,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-04 18:05:34,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244482325] [2021-07-04 18:05:34,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244482325] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-04 18:05:34,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-04 18:05:34,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-04 18:05:34,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163337856] [2021-07-04 18:05:34,603 INFO L425 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-04 18:05:34,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-04 18:05:34,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-04 18:05:34,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-04 18:05:34,604 INFO L87 Difference]: Start difference. First operand 385 states and 608 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-04 18:05:34,634 INFO L93 Difference]: Finished difference Result 1093 states and 1730 transitions. [2021-07-04 18:05:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-04 18:05:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 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 122 [2021-07-04 18:05:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-04 18:05:34,637 INFO L225 Difference]: With dead ends: 1093 [2021-07-04 18:05:34,637 INFO L226 Difference]: Without dead ends: 716 [2021-07-04 18:05:34,638 INFO L795 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 [2021-07-04 18:05:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-07-04 18:05:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-07-04 18:05:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.5776223776223777) internal successors, (1128), 715 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1128 transitions. [2021-07-04 18:05:34,653 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1128 transitions. Word has length 122 [2021-07-04 18:05:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-04 18:05:34,653 INFO L442 AbstractCegarLoop]: Abstraction has 716 states and 1128 transitions. [2021-07-04 18:05:34,653 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-04 18:05:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1128 transitions. [2021-07-04 18:05:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-07-04 18:05:34,654 INFO L517 BasicCegarLoop]: Found error trace [2021-07-04 18:05:34,655 INFO L525 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-04 18:05:34,655 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-04 18:05:34,655 INFO L374 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-07-04 18:05:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-04 18:05:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1005180377, now seen corresponding path program 1 times [2021-07-04 18:05:34,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-04 18:05:34,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017251063] [2021-07-04 18:05:34,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-04 18:05:34,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-04 18:05:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 18:05:34,669 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 18:05:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-04 18:05:34,682 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-04 18:05:34,712 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-04 18:05:34,712 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-04 18:05:34,714 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-04 18:05:34,714 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-04 18:05:34,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.07 06:05:34 BoogieIcfgContainer [2021-07-04 18:05:34,787 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-04 18:05:34,788 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-04 18:05:34,788 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-04 18:05:34,788 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-04 18:05:34,788 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.07 06:05:31" (3/4) ... [2021-07-04 18:05:34,790 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-04 18:05:34,870 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-04 18:05:34,870 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-04 18:05:34,872 INFO L168 Benchmark]: Toolchain (without parser) took 4270.08 ms. Allocated memory was 67.1 MB in the beginning and 186.6 MB in the end (delta: 119.5 MB). Free memory was 42.7 MB in the beginning and 143.5 MB in the end (delta: -100.8 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-07-04 18:05:34,872 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 52.4 MB. Free memory was 33.3 MB in the beginning and 33.3 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-04 18:05:34,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.58 ms. Allocated memory is still 67.1 MB. Free memory was 42.5 MB in the beginning and 45.8 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-07-04 18:05:34,873 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.70 ms. Allocated memory is still 67.1 MB. Free memory was 45.6 MB in the beginning and 42.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-04 18:05:34,873 INFO L168 Benchmark]: Boogie Preprocessor took 37.66 ms. Allocated memory is still 67.1 MB. Free memory was 42.9 MB in the beginning and 40.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-04 18:05:34,873 INFO L168 Benchmark]: RCFGBuilder took 686.95 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 40.6 MB in the beginning and 40.9 MB in the end (delta: -314.3 kB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. [2021-07-04 18:05:34,874 INFO L168 Benchmark]: TraceAbstraction took 3015.32 ms. Allocated memory was 83.9 MB in the beginning and 186.6 MB in the end (delta: 102.8 MB). Free memory was 40.5 MB in the beginning and 157.2 MB in the end (delta: -116.7 MB). Peak memory consumption was 58.8 MB. Max. memory is 16.1 GB. [2021-07-04 18:05:34,874 INFO L168 Benchmark]: Witness Printer took 82.91 ms. Allocated memory is still 186.6 MB. Free memory was 157.2 MB in the beginning and 143.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-07-04 18:05:34,876 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 52.4 MB. Free memory was 33.3 MB in the beginning and 33.3 MB in the end (delta: 33.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 378.58 ms. Allocated memory is still 67.1 MB. Free memory was 42.5 MB in the beginning and 45.8 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.70 ms. Allocated memory is still 67.1 MB. Free memory was 45.6 MB in the beginning and 42.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.66 ms. Allocated memory is still 67.1 MB. Free memory was 42.9 MB in the beginning and 40.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 686.95 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 40.6 MB in the beginning and 40.9 MB in the end (delta: -314.3 kB). Peak memory consumption was 21.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3015.32 ms. Allocated memory was 83.9 MB in the beginning and 186.6 MB in the end (delta: 102.8 MB). Free memory was 40.5 MB in the beginning and 157.2 MB in the end (delta: -116.7 MB). Peak memory consumption was 58.8 MB. Max. memory is 16.1 GB. * Witness Printer took 82.91 ms. Allocated memory is still 186.6 MB. Free memory was 157.2 MB in the beginning and 143.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 14.7 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: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L618] int s ; [L619] int tmp ; [L623] 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 = __VERIFIER_nondet_int() ; [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 = __VERIFIER_nondet_int() ; [L44] unsigned long l ; [L45] unsigned long Time ; [L46] unsigned long tmp = __VERIFIER_nondet_long() ; [L47] int cb ; [L48] long num1 ; [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 ; [L57] int tmp___4 ; [L58] int tmp___5 ; [L59] int tmp___6 ; [L60] int tmp___7 ; [L61] long tmp___8 = __VERIFIER_nondet_long() ; [L62] int tmp___9 ; [L63] int tmp___10 ; [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 ; [L75] s__state = initial_state [L76] blastFlag = 0 [L77] Time = tmp [L78] cb = 0 [L79] ret = -1 [L80] skip = 0 [L81] got_new_session = 0 [L82] COND TRUE s__info_callback != 0 [L83] cb = s__info_callback [L89] s__in_handshake ++ [L90] COND FALSE !(tmp___1 + 12288) [L95] COND FALSE !(s__cert == 0) [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND TRUE s__state == 8464 [L270] s__shutdown = 0 [L271] ret = __VERIFIER_nondet_int() [L272] COND TRUE blastFlag == 0 [L273] blastFlag = 1 [L275] COND FALSE !(ret <= 0) [L278] got_new_session = 1 [L279] s__state = 8496 [L280] s__init_num = 0 [L585] COND FALSE !(! s__s3__tmp__reuse_message) [L602] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND TRUE s__state == 8496 [L284] ret = __VERIFIER_nondet_int() [L285] COND TRUE blastFlag == 1 [L286] blastFlag = 2 [L288] COND FALSE !(ret <= 0) [L291] COND TRUE \read(s__hit) [L292] s__state = 8656 [L296] s__init_num = 0 [L585] COND FALSE !(! s__s3__tmp__reuse_message) [L602] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND FALSE !(s__state == 8560) [L162] COND FALSE !(s__state == 8561) [L165] COND FALSE !(s__state == 8448) [L168] COND FALSE !(s__state == 8576) [L171] COND FALSE !(s__state == 8577) [L174] COND FALSE !(s__state == 8592) [L177] COND FALSE !(s__state == 8593) [L180] COND FALSE !(s__state == 8608) [L183] COND FALSE !(s__state == 8609) [L186] COND FALSE !(s__state == 8640) [L189] COND FALSE !(s__state == 8641) [L192] COND TRUE s__state == 8656 [L490] s__session__cipher = s__s3__tmp__new_cipher [L491] tmp___9 = __VERIFIER_nondet_int() [L492] COND FALSE !(! tmp___9) [L496] ret = __VERIFIER_nondet_int() [L497] COND TRUE blastFlag == 2 [L498] blastFlag = 3 [L500] COND FALSE !(ret <= 0) [L503] s__state = 8672 [L504] s__init_num = 0 [L505] tmp___10 = __VERIFIER_nondet_int() [L506] COND FALSE !(! tmp___10) [L585] COND FALSE !(! s__s3__tmp__reuse_message) [L602] skip = 0 [L99] COND TRUE 1 [L101] state = s__state [L102] COND FALSE !(s__state == 12292) [L105] COND FALSE !(s__state == 16384) [L108] COND FALSE !(s__state == 8192) [L111] COND FALSE !(s__state == 24576) [L114] COND FALSE !(s__state == 8195) [L117] COND FALSE !(s__state == 8480) [L120] COND FALSE !(s__state == 8481) [L123] COND FALSE !(s__state == 8482) [L126] COND FALSE !(s__state == 8464) [L129] COND FALSE !(s__state == 8465) [L132] COND FALSE !(s__state == 8466) [L135] COND FALSE !(s__state == 8496) [L138] COND FALSE !(s__state == 8497) [L141] COND FALSE !(s__state == 8512) [L144] COND FALSE !(s__state == 8513) [L147] COND FALSE !(s__state == 8528) [L150] COND FALSE !(s__state == 8529) [L153] COND FALSE !(s__state == 8544) [L156] COND FALSE !(s__state == 8545) [L159] COND FALSE !(s__state == 8560) [L162] COND FALSE !(s__state == 8561) [L165] COND FALSE !(s__state == 8448) [L168] COND FALSE !(s__state == 8576) [L171] COND FALSE !(s__state == 8577) [L174] COND FALSE !(s__state == 8592) [L177] COND FALSE !(s__state == 8593) [L180] COND FALSE !(s__state == 8608) [L183] COND FALSE !(s__state == 8609) [L186] COND FALSE !(s__state == 8640) [L189] COND FALSE !(s__state == 8641) [L192] COND FALSE !(s__state == 8656) [L195] COND FALSE !(s__state == 8657) [L198] COND TRUE s__state == 8672 [L513] ret = __VERIFIER_nondet_int() [L514] COND FALSE !(blastFlag == 4) [L517] COND TRUE blastFlag == 3 [L613] reach_error() - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION CFG has 1 procedures, 143 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2891.4ms, OverallIterations: 16, TraceHistogramMax: 4, EmptinessCheckTime: 28.5ms, AutomataDifference: 1898.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2225 SDtfs, 2216 SDslu, 435 SDs, 0 SdLazy, 1340 SolverSat, 604 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1132.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=716occurred in iteration=15, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 159.0ms AutomataMinimizationTime, 15 MinimizatonAttempts, 52 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 37.4ms SsaConstructionTime, 131.5ms SatisfiabilityAnalysisTime, 414.3ms InterpolantComputationTime, 1472 NumberOfCodeBlocks, 1472 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1335 ConstructedInterpolants, 0 QuantifiedInterpolants, 2476 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 15 PerfectInterpolantSequences, 736/736 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! [2021-07-04 18:05:34,929 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...