./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash defe4a000b54820195525cab63f7790d3323d50a 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 20:12:49,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 20:12:49,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 20:12:49,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 20:12:49,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 20:12:49,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 20:12:49,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 20:12:49,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 20:12:49,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 20:12:49,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 20:12:49,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 20:12:49,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 20:12:49,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 20:12:49,282 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 20:12:49,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 20:12:49,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 20:12:49,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 20:12:49,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 20:12:49,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 20:12:49,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 20:12:49,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 20:12:49,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 20:12:49,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 20:12:49,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 20:12:49,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 20:12:49,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 20:12:49,310 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 20:12:49,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 20:12:49,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 20:12:49,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 20:12:49,312 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 20:12:49,313 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 20:12:49,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 20:12:49,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 20:12:49,315 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 20:12:49,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 20:12:49,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 20:12:49,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 20:12:49,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 20:12:49,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 20:12:49,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 20:12:49,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 20:12:49,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 20:12:49,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 20:12:49,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 20:12:49,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 20:12:49,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 20:12:49,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 20:12:49,367 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 20:12:49,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 20:12:49,368 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 20:12:49,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 20:12:49,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 20:12:49,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 20:12:49,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 20:12:49,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 20:12:49,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 20:12:49,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 20:12:49,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 20:12:49,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 20:12:49,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 20:12:49,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 20:12:49,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 20:12:49,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 20:12:49,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:12:49,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 20:12:49,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 20:12:49,372 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 20:12:49,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 20:12:49,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 20:12:49,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 20:12:49,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 20:12:49,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> defe4a000b54820195525cab63f7790d3323d50a [2021-08-25 20:12:49,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 20:12:49,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 20:12:49,700 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 20:12:49,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 20:12:49,702 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 20:12:49,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c [2021-08-25 20:12:49,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ced0b6fc/2cbfefaf7401436eb441cb27bc0cd646/FLAG8de45672c [2021-08-25 20:12:50,255 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 20:12:50,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c [2021-08-25 20:12:50,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ced0b6fc/2cbfefaf7401436eb441cb27bc0cd646/FLAG8de45672c [2021-08-25 20:12:50,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ced0b6fc/2cbfefaf7401436eb441cb27bc0cd646 [2021-08-25 20:12:50,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 20:12:50,667 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 20:12:50,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 20:12:50,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 20:12:50,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 20:12:50,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:12:50" (1/1) ... [2021-08-25 20:12:50,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a2f92b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:50, skipping insertion in model container [2021-08-25 20:12:50,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 08:12:50" (1/1) ... [2021-08-25 20:12:50,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 20:12:50,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 20:12:50,924 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c[43168,43181] [2021-08-25 20:12:50,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:12:50,942 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 20:12:51,018 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl-simplified/s3_srvr_11.cil.c[43168,43181] [2021-08-25 20:12:51,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 20:12:51,032 INFO L208 MainTranslator]: Completed translation [2021-08-25 20:12:51,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51 WrapperNode [2021-08-25 20:12:51,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 20:12:51,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 20:12:51,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 20:12:51,035 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 20:12:51,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 20:12:51,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 20:12:51,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 20:12:51,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 20:12:51,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 20:12:51,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 20:12:51,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 20:12:51,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 20:12:51,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (1/1) ... [2021-08-25 20:12:51,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 20:12:51,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:12:51,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 20:12:51,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 20:12:51,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 20:12:51,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 20:12:51,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 20:12:51,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 20:12:51,369 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-08-25 20:12:51,835 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-08-25 20:12:51,836 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-08-25 20:12:51,842 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 20:12:51,843 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-25 20:12:51,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:12:51 BoogieIcfgContainer [2021-08-25 20:12:51,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 20:12:51,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 20:12:51,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 20:12:51,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 20:12:51,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 08:12:50" (1/3) ... [2021-08-25 20:12:51,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300c3a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:12:51, skipping insertion in model container [2021-08-25 20:12:51,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 08:12:51" (2/3) ... [2021-08-25 20:12:51,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@300c3a1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 08:12:51, skipping insertion in model container [2021-08-25 20:12:51,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:12:51" (3/3) ... [2021-08-25 20:12:51,852 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_11.cil.c [2021-08-25 20:12:51,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 20:12:51,857 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 20:12:51,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 20:12:51,900 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 20:12:51,901 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 20:12:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.7414965986394557) internal successors, (256), 148 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-25 20:12:51,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:51,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:51,923 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:51,928 INFO L82 PathProgramCache]: Analyzing trace with hash -814657320, now seen corresponding path program 1 times [2021-08-25 20:12:51,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:51,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079433541] [2021-08-25 20:12:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:51,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:52,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:52,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:52,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079433541] [2021-08-25 20:12:52,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079433541] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:52,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:52,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:52,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198149315] [2021-08-25 20:12:52,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:52,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:52,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:52,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:52,164 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.7414965986394557) internal successors, (256), 148 states have internal predecessors, (256), 0 states have call successors, (0), 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 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:52,426 INFO L93 Difference]: Finished difference Result 316 states and 542 transitions. [2021-08-25 20:12:52,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:52,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-25 20:12:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:52,437 INFO L225 Difference]: With dead ends: 316 [2021-08-25 20:12:52,437 INFO L226 Difference]: Without dead ends: 155 [2021-08-25 20:12:52,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:52,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-25 20:12:52,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 153. [2021-08-25 20:12:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.5855263157894737) internal successors, (241), 152 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 241 transitions. [2021-08-25 20:12:52,478 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 241 transitions. Word has length 26 [2021-08-25 20:12:52,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:52,478 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 241 transitions. [2021-08-25 20:12:52,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,479 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 241 transitions. [2021-08-25 20:12:52,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:12:52,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:52,481 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:52,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 20:12:52,481 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash 327844106, now seen corresponding path program 1 times [2021-08-25 20:12:52,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:52,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745426205] [2021-08-25 20:12:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:52,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:52,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:52,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745426205] [2021-08-25 20:12:52,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745426205] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:52,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:52,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:52,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164958510] [2021-08-25 20:12:52,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:52,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:52,550 INFO L87 Difference]: Start difference. First operand 153 states and 241 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:52,695 INFO L93 Difference]: Finished difference Result 319 states and 502 transitions. [2021-08-25 20:12:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-25 20:12:52,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:52,701 INFO L225 Difference]: With dead ends: 319 [2021-08-25 20:12:52,702 INFO L226 Difference]: Without dead ends: 174 [2021-08-25 20:12:52,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-25 20:12:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-08-25 20:12:52,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.560693641618497) internal successors, (270), 173 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 270 transitions. [2021-08-25 20:12:52,732 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 270 transitions. Word has length 27 [2021-08-25 20:12:52,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:52,732 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 270 transitions. [2021-08-25 20:12:52,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,733 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 270 transitions. [2021-08-25 20:12:52,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:12:52,735 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:52,735 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:52,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 20:12:52,737 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:52,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:52,738 INFO L82 PathProgramCache]: Analyzing trace with hash 883966207, now seen corresponding path program 1 times [2021-08-25 20:12:52,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:52,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362860118] [2021-08-25 20:12:52,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:52,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:52,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:52,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362860118] [2021-08-25 20:12:52,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362860118] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:52,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:52,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:52,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560686888] [2021-08-25 20:12:52,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:52,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:52,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:52,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:52,843 INFO L87 Difference]: Start difference. First operand 174 states and 270 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:52,966 INFO L93 Difference]: Finished difference Result 348 states and 542 transitions. [2021-08-25 20:12:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-25 20:12:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:52,968 INFO L225 Difference]: With dead ends: 348 [2021-08-25 20:12:52,968 INFO L226 Difference]: Without dead ends: 182 [2021-08-25 20:12:52,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:52,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-25 20:12:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-08-25 20:12:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.5698324022346368) internal successors, (281), 179 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 281 transitions. [2021-08-25 20:12:52,977 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 281 transitions. Word has length 27 [2021-08-25 20:12:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:52,977 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 281 transitions. [2021-08-25 20:12:52,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:52,977 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 281 transitions. [2021-08-25 20:12:52,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 20:12:52,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:52,978 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:52,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 20:12:52,979 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:52,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1794489921, now seen corresponding path program 1 times [2021-08-25 20:12:52,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:52,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020727214] [2021-08-25 20:12:52,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:52,980 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:53,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:53,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020727214] [2021-08-25 20:12:53,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020727214] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:53,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:53,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:53,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74881284] [2021-08-25 20:12:53,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:53,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:53,022 INFO L87 Difference]: Start difference. First operand 180 states and 281 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:53,138 INFO L93 Difference]: Finished difference Result 353 states and 552 transitions. [2021-08-25 20:12:53,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:53,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-25 20:12:53,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:53,139 INFO L225 Difference]: With dead ends: 353 [2021-08-25 20:12:53,140 INFO L226 Difference]: Without dead ends: 181 [2021-08-25 20:12:53,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-25 20:12:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-08-25 20:12:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.5666666666666667) internal successors, (282), 180 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 282 transitions. [2021-08-25 20:12:53,148 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 282 transitions. Word has length 27 [2021-08-25 20:12:53,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:53,148 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 282 transitions. [2021-08-25 20:12:53,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,149 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 282 transitions. [2021-08-25 20:12:53,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 20:12:53,150 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:53,150 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:53,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 20:12:53,150 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:53,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:53,151 INFO L82 PathProgramCache]: Analyzing trace with hash -594155684, now seen corresponding path program 1 times [2021-08-25 20:12:53,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:53,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924175945] [2021-08-25 20:12:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:53,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:53,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:53,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924175945] [2021-08-25 20:12:53,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924175945] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:53,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:53,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:53,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504782424] [2021-08-25 20:12:53,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:53,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:53,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:53,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:53,198 INFO L87 Difference]: Start difference. First operand 181 states and 282 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:53,305 INFO L93 Difference]: Finished difference Result 364 states and 564 transitions. [2021-08-25 20:12:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-25 20:12:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:53,307 INFO L225 Difference]: With dead ends: 364 [2021-08-25 20:12:53,307 INFO L226 Difference]: Without dead ends: 191 [2021-08-25 20:12:53,308 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-25 20:12:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 181. [2021-08-25 20:12:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.5555555555555556) internal successors, (280), 180 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 280 transitions. [2021-08-25 20:12:53,316 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 280 transitions. Word has length 28 [2021-08-25 20:12:53,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:53,317 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 280 transitions. [2021-08-25 20:12:53,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,317 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 280 transitions. [2021-08-25 20:12:53,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-25 20:12:53,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:53,320 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:53,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-25 20:12:53,321 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1519140995, now seen corresponding path program 1 times [2021-08-25 20:12:53,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:53,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609340639] [2021-08-25 20:12:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:53,322 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:53,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:53,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609340639] [2021-08-25 20:12:53,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609340639] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:53,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:53,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:53,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134176207] [2021-08-25 20:12:53,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:53,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:53,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:53,369 INFO L87 Difference]: Start difference. First operand 181 states and 280 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:53,554 INFO L93 Difference]: Finished difference Result 364 states and 560 transitions. [2021-08-25 20:12:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:53,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-08-25 20:12:53,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:53,555 INFO L225 Difference]: With dead ends: 364 [2021-08-25 20:12:53,555 INFO L226 Difference]: Without dead ends: 191 [2021-08-25 20:12:53,556 INFO L781 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 [2021-08-25 20:12:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-25 20:12:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 181. [2021-08-25 20:12:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.5444444444444445) internal successors, (278), 180 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) [2021-08-25 20:12:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 278 transitions. [2021-08-25 20:12:53,561 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 278 transitions. Word has length 29 [2021-08-25 20:12:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:53,562 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 278 transitions. [2021-08-25 20:12:53,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 278 transitions. [2021-08-25 20:12:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 20:12:53,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:53,562 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:53,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 20:12:53,563 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:53,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1615530751, now seen corresponding path program 1 times [2021-08-25 20:12:53,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:53,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651434801] [2021-08-25 20:12:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:53,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:53,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:53,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651434801] [2021-08-25 20:12:53,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651434801] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:53,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:53,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:53,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825335501] [2021-08-25 20:12:53,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:53,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:53,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:53,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:53,624 INFO L87 Difference]: Start difference. First operand 181 states and 278 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:53,762 INFO L93 Difference]: Finished difference Result 364 states and 556 transitions. [2021-08-25 20:12:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:53,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-08-25 20:12:53,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:53,764 INFO L225 Difference]: With dead ends: 364 [2021-08-25 20:12:53,764 INFO L226 Difference]: Without dead ends: 191 [2021-08-25 20:12:53,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-25 20:12:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 181. [2021-08-25 20:12:53,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.5333333333333334) internal successors, (276), 180 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 276 transitions. [2021-08-25 20:12:53,771 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 276 transitions. Word has length 30 [2021-08-25 20:12:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:53,771 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 276 transitions. [2021-08-25 20:12:53,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:53,772 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 276 transitions. [2021-08-25 20:12:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 20:12:53,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:53,779 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:53,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-25 20:12:53,779 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1189847454, now seen corresponding path program 1 times [2021-08-25 20:12:53,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:53,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006875570] [2021-08-25 20:12:53,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:53,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:53,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:53,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006875570] [2021-08-25 20:12:53,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006875570] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:53,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:53,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 20:12:53,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146360343] [2021-08-25 20:12:53,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 20:12:53,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:53,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 20:12:53,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-25 20:12:53,855 INFO L87 Difference]: Start difference. First operand 181 states and 276 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:54,129 INFO L93 Difference]: Finished difference Result 512 states and 779 transitions. [2021-08-25 20:12:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 20:12:54,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-08-25 20:12:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:54,131 INFO L225 Difference]: With dead ends: 512 [2021-08-25 20:12:54,131 INFO L226 Difference]: Without dead ends: 339 [2021-08-25 20:12:54,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:12:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-08-25 20:12:54,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 324. [2021-08-25 20:12:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.5325077399380804) internal successors, (495), 323 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 495 transitions. [2021-08-25 20:12:54,143 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 495 transitions. Word has length 30 [2021-08-25 20:12:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:54,144 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 495 transitions. [2021-08-25 20:12:54,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 495 transitions. [2021-08-25 20:12:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-25 20:12:54,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:54,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:54,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-25 20:12:54,145 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1632006041, now seen corresponding path program 1 times [2021-08-25 20:12:54,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:54,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198195431] [2021-08-25 20:12:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:54,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:54,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:54,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198195431] [2021-08-25 20:12:54,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198195431] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:54,178 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:54,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:54,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784627893] [2021-08-25 20:12:54,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:54,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:54,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:54,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:54,179 INFO L87 Difference]: Start difference. First operand 324 states and 495 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:54,361 INFO L93 Difference]: Finished difference Result 699 states and 1075 transitions. [2021-08-25 20:12:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:54,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-25 20:12:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:54,363 INFO L225 Difference]: With dead ends: 699 [2021-08-25 20:12:54,364 INFO L226 Difference]: Without dead ends: 383 [2021-08-25 20:12:54,365 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:54,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-08-25 20:12:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 375. [2021-08-25 20:12:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.5561497326203209) internal successors, (582), 374 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 582 transitions. [2021-08-25 20:12:54,379 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 582 transitions. Word has length 44 [2021-08-25 20:12:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:54,379 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 582 transitions. [2021-08-25 20:12:54,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 582 transitions. [2021-08-25 20:12:54,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-25 20:12:54,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:54,380 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:54,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 20:12:54,381 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:54,381 INFO L82 PathProgramCache]: Analyzing trace with hash -954576389, now seen corresponding path program 1 times [2021-08-25 20:12:54,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:54,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923058952] [2021-08-25 20:12:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:54,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:54,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:54,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923058952] [2021-08-25 20:12:54,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923058952] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:54,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:54,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:54,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980007585] [2021-08-25 20:12:54,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:54,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:54,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:54,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:54,414 INFO L87 Difference]: Start difference. First operand 375 states and 582 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:54,607 INFO L93 Difference]: Finished difference Result 776 states and 1211 transitions. [2021-08-25 20:12:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-25 20:12:54,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:54,610 INFO L225 Difference]: With dead ends: 776 [2021-08-25 20:12:54,610 INFO L226 Difference]: Without dead ends: 407 [2021-08-25 20:12:54,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:54,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-25 20:12:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 399. [2021-08-25 20:12:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 1.5778894472361809) internal successors, (628), 398 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 628 transitions. [2021-08-25 20:12:54,627 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 628 transitions. Word has length 45 [2021-08-25 20:12:54,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:54,628 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 628 transitions. [2021-08-25 20:12:54,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 628 transitions. [2021-08-25 20:12:54,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-25 20:12:54,629 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:54,629 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-25 20:12:54,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-25 20:12:54,630 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:54,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:54,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1426018212, now seen corresponding path program 1 times [2021-08-25 20:12:54,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:54,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180993674] [2021-08-25 20:12:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:54,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-25 20:12:54,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:54,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180993674] [2021-08-25 20:12:54,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180993674] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:54,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:54,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:54,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713721388] [2021-08-25 20:12:54,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:54,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:54,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:54,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:54,665 INFO L87 Difference]: Start difference. First operand 399 states and 628 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:54,821 INFO L93 Difference]: Finished difference Result 830 states and 1311 transitions. [2021-08-25 20:12:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:54,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-25 20:12:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:54,824 INFO L225 Difference]: With dead ends: 830 [2021-08-25 20:12:54,824 INFO L226 Difference]: Without dead ends: 439 [2021-08-25 20:12:54,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-25 20:12:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2021-08-25 20:12:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.582191780821918) internal successors, (693), 438 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 693 transitions. [2021-08-25 20:12:54,840 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 693 transitions. Word has length 55 [2021-08-25 20:12:54,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:54,841 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 693 transitions. [2021-08-25 20:12:54,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 693 transitions. [2021-08-25 20:12:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-25 20:12:54,842 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:54,842 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:54,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-25 20:12:54,843 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash 961137590, now seen corresponding path program 1 times [2021-08-25 20:12:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:54,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890170634] [2021-08-25 20:12:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:54,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-25 20:12:54,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:54,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890170634] [2021-08-25 20:12:54,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890170634] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:54,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:54,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:54,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433299101] [2021-08-25 20:12:54,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:54,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:54,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:54,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:54,876 INFO L87 Difference]: Start difference. First operand 439 states and 693 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:55,028 INFO L93 Difference]: Finished difference Result 912 states and 1441 transitions. [2021-08-25 20:12:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:55,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-25 20:12:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:55,031 INFO L225 Difference]: With dead ends: 912 [2021-08-25 20:12:55,031 INFO L226 Difference]: Without dead ends: 481 [2021-08-25 20:12:55,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-25 20:12:55,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 477. [2021-08-25 20:12:55,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5819327731092436) internal successors, (753), 476 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:55,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 753 transitions. [2021-08-25 20:12:55,048 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 753 transitions. Word has length 82 [2021-08-25 20:12:55,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:55,049 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 753 transitions. [2021-08-25 20:12:55,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:55,049 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 753 transitions. [2021-08-25 20:12:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-25 20:12:55,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:55,050 INFO L512 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] [2021-08-25 20:12:55,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-25 20:12:55,051 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:55,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash -986689731, now seen corresponding path program 1 times [2021-08-25 20:12:55,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:55,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673922511] [2021-08-25 20:12:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:55,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-25 20:12:55,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:55,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673922511] [2021-08-25 20:12:55,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673922511] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:55,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:55,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:55,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82141028] [2021-08-25 20:12:55,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:55,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:55,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:55,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,084 INFO L87 Difference]: Start difference. First operand 477 states and 753 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) [2021-08-25 20:12:55,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:55,236 INFO L93 Difference]: Finished difference Result 950 states and 1498 transitions. [2021-08-25 20:12:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:55,236 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 83 [2021-08-25 20:12:55,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:55,238 INFO L225 Difference]: With dead ends: 950 [2021-08-25 20:12:55,239 INFO L226 Difference]: Without dead ends: 481 [2021-08-25 20:12:55,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-25 20:12:55,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 477. [2021-08-25 20:12:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.5756302521008403) internal successors, (750), 476 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 750 transitions. [2021-08-25 20:12:55,261 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 750 transitions. Word has length 83 [2021-08-25 20:12:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:55,262 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 750 transitions. [2021-08-25 20:12:55,262 INFO L471 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) [2021-08-25 20:12:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 750 transitions. [2021-08-25 20:12:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-25 20:12:55,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:55,263 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:55,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-25 20:12:55,264 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1836560986, now seen corresponding path program 1 times [2021-08-25 20:12:55,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:55,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018594168] [2021-08-25 20:12:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:55,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-25 20:12:55,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:55,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018594168] [2021-08-25 20:12:55,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018594168] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:55,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:55,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:55,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794393038] [2021-08-25 20:12:55,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:55,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:55,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,293 INFO L87 Difference]: Start difference. First operand 477 states and 750 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) [2021-08-25 20:12:55,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:55,436 INFO L93 Difference]: Finished difference Result 998 states and 1573 transitions. [2021-08-25 20:12:55,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:55,436 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 84 [2021-08-25 20:12:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:55,439 INFO L225 Difference]: With dead ends: 998 [2021-08-25 20:12:55,439 INFO L226 Difference]: Without dead ends: 529 [2021-08-25 20:12:55,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-25 20:12:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 513. [2021-08-25 20:12:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.572265625) internal successors, (805), 512 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 805 transitions. [2021-08-25 20:12:55,457 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 805 transitions. Word has length 84 [2021-08-25 20:12:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:55,457 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 805 transitions. [2021-08-25 20:12:55,457 INFO L471 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) [2021-08-25 20:12:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 805 transitions. [2021-08-25 20:12:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-25 20:12:55,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:55,459 INFO L512 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:55,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-25 20:12:55,459 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:55,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:55,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1112959693, now seen corresponding path program 1 times [2021-08-25 20:12:55,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:55,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081610850] [2021-08-25 20:12:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:55,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-25 20:12:55,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:55,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081610850] [2021-08-25 20:12:55,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081610850] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:55,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:55,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:55,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770890792] [2021-08-25 20:12:55,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:55,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:55,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:55,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,488 INFO L87 Difference]: Start difference. First operand 513 states and 805 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) [2021-08-25 20:12:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:55,641 INFO L93 Difference]: Finished difference Result 1034 states and 1624 transitions. [2021-08-25 20:12:55,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:55,642 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 85 [2021-08-25 20:12:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:55,644 INFO L225 Difference]: With dead ends: 1034 [2021-08-25 20:12:55,644 INFO L226 Difference]: Without dead ends: 529 [2021-08-25 20:12:55,645 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-25 20:12:55,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 513. [2021-08-25 20:12:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.564453125) internal successors, (801), 512 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 801 transitions. [2021-08-25 20:12:55,663 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 801 transitions. Word has length 85 [2021-08-25 20:12:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:55,663 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 801 transitions. [2021-08-25 20:12:55,663 INFO L471 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) [2021-08-25 20:12:55,663 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 801 transitions. [2021-08-25 20:12:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-25 20:12:55,664 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:55,664 INFO L512 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] [2021-08-25 20:12:55,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-25 20:12:55,665 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:55,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:55,665 INFO L82 PathProgramCache]: Analyzing trace with hash 167103299, now seen corresponding path program 1 times [2021-08-25 20:12:55,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:55,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452786661] [2021-08-25 20:12:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:55,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:55,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:55,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452786661] [2021-08-25 20:12:55,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452786661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:55,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:55,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:55,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953133766] [2021-08-25 20:12:55,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:55,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:55,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,694 INFO L87 Difference]: Start difference. First operand 513 states and 801 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) [2021-08-25 20:12:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:55,852 INFO L93 Difference]: Finished difference Result 1079 states and 1683 transitions. [2021-08-25 20:12:55,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:55,852 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 [2021-08-25 20:12:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:55,855 INFO L225 Difference]: With dead ends: 1079 [2021-08-25 20:12:55,855 INFO L226 Difference]: Without dead ends: 574 [2021-08-25 20:12:55,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-08-25 20:12:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 566. [2021-08-25 20:12:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 565 states have (on average 1.5610619469026548) internal successors, (882), 565 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 882 transitions. [2021-08-25 20:12:55,874 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 882 transitions. Word has length 85 [2021-08-25 20:12:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:55,875 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 882 transitions. [2021-08-25 20:12:55,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 882 transitions. [2021-08-25 20:12:55,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-25 20:12:55,876 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:55,876 INFO L512 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] [2021-08-25 20:12:55,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-25 20:12:55,877 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:55,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1767051647, now seen corresponding path program 1 times [2021-08-25 20:12:55,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:55,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761940696] [2021-08-25 20:12:55,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:55,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 20:12:55,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:55,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761940696] [2021-08-25 20:12:55,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761940696] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:55,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:55,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:55,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071808504] [2021-08-25 20:12:55,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:55,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:55,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:55,952 INFO L87 Difference]: Start difference. First operand 566 states and 882 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) [2021-08-25 20:12:56,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:56,127 INFO L93 Difference]: Finished difference Result 1132 states and 1762 transitions. [2021-08-25 20:12:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:56,127 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 [2021-08-25 20:12:56,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:56,130 INFO L225 Difference]: With dead ends: 1132 [2021-08-25 20:12:56,130 INFO L226 Difference]: Without dead ends: 572 [2021-08-25 20:12:56,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-08-25 20:12:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 564. [2021-08-25 20:12:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.5577264653641207) internal successors, (877), 563 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 877 transitions. [2021-08-25 20:12:56,163 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 877 transitions. Word has length 86 [2021-08-25 20:12:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:56,164 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 877 transitions. [2021-08-25 20:12:56,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,164 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 877 transitions. [2021-08-25 20:12:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-25 20:12:56,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:56,168 INFO L512 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, 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] [2021-08-25 20:12:56,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-25 20:12:56,170 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:56,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1128064849, now seen corresponding path program 1 times [2021-08-25 20:12:56,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:56,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194858749] [2021-08-25 20:12:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:56,172 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-25 20:12:56,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:56,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194858749] [2021-08-25 20:12:56,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194858749] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:56,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:56,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:56,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287064218] [2021-08-25 20:12:56,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:56,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:56,216 INFO L87 Difference]: Start difference. First operand 564 states and 877 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) [2021-08-25 20:12:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:56,363 INFO L93 Difference]: Finished difference Result 1160 states and 1805 transitions. [2021-08-25 20:12:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:56,364 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 107 [2021-08-25 20:12:56,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:56,366 INFO L225 Difference]: With dead ends: 1160 [2021-08-25 20:12:56,366 INFO L226 Difference]: Without dead ends: 604 [2021-08-25 20:12:56,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-25 20:12:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 594. [2021-08-25 20:12:56,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.548060708263069) internal successors, (918), 593 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 918 transitions. [2021-08-25 20:12:56,392 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 918 transitions. Word has length 107 [2021-08-25 20:12:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:56,392 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 918 transitions. [2021-08-25 20:12:56,392 INFO L471 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) [2021-08-25 20:12:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 918 transitions. [2021-08-25 20:12:56,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-08-25 20:12:56,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:56,394 INFO L512 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, 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] [2021-08-25 20:12:56,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-25 20:12:56,395 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:56,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:56,395 INFO L82 PathProgramCache]: Analyzing trace with hash 56241544, now seen corresponding path program 1 times [2021-08-25 20:12:56,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:56,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185122794] [2021-08-25 20:12:56,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:56,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-25 20:12:56,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:56,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185122794] [2021-08-25 20:12:56,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185122794] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:56,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:56,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:56,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930110701] [2021-08-25 20:12:56,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:56,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:56,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:56,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:56,425 INFO L87 Difference]: Start difference. First operand 594 states and 918 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) [2021-08-25 20:12:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:56,564 INFO L93 Difference]: Finished difference Result 1190 states and 1840 transitions. [2021-08-25 20:12:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:56,565 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 108 [2021-08-25 20:12:56,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:56,567 INFO L225 Difference]: With dead ends: 1190 [2021-08-25 20:12:56,567 INFO L226 Difference]: Without dead ends: 604 [2021-08-25 20:12:56,568 INFO L781 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 [2021-08-25 20:12:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-25 20:12:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 594. [2021-08-25 20:12:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.5379426644182124) internal successors, (912), 593 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 912 transitions. [2021-08-25 20:12:56,587 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 912 transitions. Word has length 108 [2021-08-25 20:12:56,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:56,587 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 912 transitions. [2021-08-25 20:12:56,588 INFO L471 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) [2021-08-25 20:12:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 912 transitions. [2021-08-25 20:12:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-25 20:12:56,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:56,589 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-08-25 20:12:56,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-25 20:12:56,590 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash -296831400, now seen corresponding path program 1 times [2021-08-25 20:12:56,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:56,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248480831] [2021-08-25 20:12:56,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:56,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-08-25 20:12:56,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:56,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248480831] [2021-08-25 20:12:56,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248480831] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:56,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:56,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:56,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955627273] [2021-08-25 20:12:56,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:56,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:56,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:56,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:56,622 INFO L87 Difference]: Start difference. First operand 594 states and 912 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) [2021-08-25 20:12:56,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:56,754 INFO L93 Difference]: Finished difference Result 1240 states and 1907 transitions. [2021-08-25 20:12:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:56,755 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 111 [2021-08-25 20:12:56,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:56,758 INFO L225 Difference]: With dead ends: 1240 [2021-08-25 20:12:56,758 INFO L226 Difference]: Without dead ends: 654 [2021-08-25 20:12:56,760 INFO L781 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 [2021-08-25 20:12:56,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-08-25 20:12:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 628. [2021-08-25 20:12:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.529505582137161) internal successors, (959), 627 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 959 transitions. [2021-08-25 20:12:56,786 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 959 transitions. Word has length 111 [2021-08-25 20:12:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:56,787 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 959 transitions. [2021-08-25 20:12:56,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 959 transitions. [2021-08-25 20:12:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-25 20:12:56,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:56,788 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-08-25 20:12:56,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-25 20:12:56,789 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:56,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1499138703, now seen corresponding path program 1 times [2021-08-25 20:12:56,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:56,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227585704] [2021-08-25 20:12:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:56,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-08-25 20:12:56,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:56,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227585704] [2021-08-25 20:12:56,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227585704] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:56,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:56,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:56,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249694741] [2021-08-25 20:12:56,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:56,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:56,831 INFO L87 Difference]: Start difference. First operand 628 states and 959 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:56,967 INFO L93 Difference]: Finished difference Result 1274 states and 1948 transitions. [2021-08-25 20:12:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-08-25 20:12:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:56,970 INFO L225 Difference]: With dead ends: 1274 [2021-08-25 20:12:56,970 INFO L226 Difference]: Without dead ends: 654 [2021-08-25 20:12:56,971 INFO L781 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 [2021-08-25 20:12:56,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-08-25 20:12:56,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 628. [2021-08-25 20:12:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 1.5199362041467304) internal successors, (953), 627 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 953 transitions. [2021-08-25 20:12:56,998 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 953 transitions. Word has length 112 [2021-08-25 20:12:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:56,999 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 953 transitions. [2021-08-25 20:12:56,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 953 transitions. [2021-08-25 20:12:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-25 20:12:57,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:57,001 INFO L512 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, 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] [2021-08-25 20:12:57,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-25 20:12:57,001 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:57,002 INFO L82 PathProgramCache]: Analyzing trace with hash 657079250, now seen corresponding path program 1 times [2021-08-25 20:12:57,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:57,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883637263] [2021-08-25 20:12:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:57,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:57,038 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-25 20:12:57,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:57,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883637263] [2021-08-25 20:12:57,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883637263] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:57,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:57,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:57,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372892615] [2021-08-25 20:12:57,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:57,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:57,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:57,042 INFO L87 Difference]: Start difference. First operand 628 states and 953 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:57,202 INFO L93 Difference]: Finished difference Result 1301 states and 1973 transitions. [2021-08-25 20:12:57,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 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 123 [2021-08-25 20:12:57,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:57,205 INFO L225 Difference]: With dead ends: 1301 [2021-08-25 20:12:57,205 INFO L226 Difference]: Without dead ends: 681 [2021-08-25 20:12:57,206 INFO L781 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 [2021-08-25 20:12:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-08-25 20:12:57,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 675. [2021-08-25 20:12:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.5148367952522255) internal successors, (1021), 674 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1021 transitions. [2021-08-25 20:12:57,230 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1021 transitions. Word has length 123 [2021-08-25 20:12:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:57,231 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1021 transitions. [2021-08-25 20:12:57,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1021 transitions. [2021-08-25 20:12:57,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-25 20:12:57,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:57,233 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:57,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-25 20:12:57,233 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:57,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1371731480, now seen corresponding path program 1 times [2021-08-25 20:12:57,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:57,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643419918] [2021-08-25 20:12:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:57,234 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:57,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-08-25 20:12:57,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:57,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643419918] [2021-08-25 20:12:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643419918] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:57,288 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:57,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:57,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881505321] [2021-08-25 20:12:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:57,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:57,290 INFO L87 Difference]: Start difference. First operand 675 states and 1021 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:57,345 INFO L93 Difference]: Finished difference Result 1344 states and 2031 transitions. [2021-08-25 20:12:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-08-25 20:12:57,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:57,351 INFO L225 Difference]: With dead ends: 1344 [2021-08-25 20:12:57,351 INFO L226 Difference]: Without dead ends: 1342 [2021-08-25 20:12:57,352 INFO L781 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 [2021-08-25 20:12:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-08-25 20:12:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1340. [2021-08-25 20:12:57,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1339 states have (on average 1.513816280806572) internal successors, (2027), 1339 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2027 transitions. [2021-08-25 20:12:57,406 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2027 transitions. Word has length 124 [2021-08-25 20:12:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:57,406 INFO L470 AbstractCegarLoop]: Abstraction has 1340 states and 2027 transitions. [2021-08-25 20:12:57,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2027 transitions. [2021-08-25 20:12:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-25 20:12:57,409 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:57,409 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:57,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-08-25 20:12:57,410 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:57,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:57,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1920674126, now seen corresponding path program 1 times [2021-08-25 20:12:57,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:57,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000433519] [2021-08-25 20:12:57,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:57,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-25 20:12:57,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:57,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000433519] [2021-08-25 20:12:57,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000433519] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:57,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:57,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:57,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668491070] [2021-08-25 20:12:57,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:57,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:57,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:57,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:57,446 INFO L87 Difference]: Start difference. First operand 1340 states and 2027 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:57,549 INFO L93 Difference]: Finished difference Result 3329 states and 5035 transitions. [2021-08-25 20:12:57,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:57,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-08-25 20:12:57,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:57,557 INFO L225 Difference]: With dead ends: 3329 [2021-08-25 20:12:57,558 INFO L226 Difference]: Without dead ends: 1997 [2021-08-25 20:12:57,560 INFO L781 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 [2021-08-25 20:12:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1997 states. [2021-08-25 20:12:57,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1997 to 1995. [2021-08-25 20:12:57,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 1.5110330992978938) internal successors, (3013), 1994 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3013 transitions. [2021-08-25 20:12:57,633 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3013 transitions. Word has length 125 [2021-08-25 20:12:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:57,633 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3013 transitions. [2021-08-25 20:12:57,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3013 transitions. [2021-08-25 20:12:57,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-25 20:12:57,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:57,637 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:57,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-08-25 20:12:57,637 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:57,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:57,638 INFO L82 PathProgramCache]: Analyzing trace with hash 232432692, now seen corresponding path program 1 times [2021-08-25 20:12:57,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:57,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722905374] [2021-08-25 20:12:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:57,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-08-25 20:12:57,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:57,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722905374] [2021-08-25 20:12:57,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722905374] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:57,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:57,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:57,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519484273] [2021-08-25 20:12:57,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:57,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:57,673 INFO L87 Difference]: Start difference. First operand 1995 states and 3013 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) [2021-08-25 20:12:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:57,765 INFO L93 Difference]: Finished difference Result 4617 states and 6972 transitions. [2021-08-25 20:12:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:57,766 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 125 [2021-08-25 20:12:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:57,776 INFO L225 Difference]: With dead ends: 4617 [2021-08-25 20:12:57,776 INFO L226 Difference]: Without dead ends: 2630 [2021-08-25 20:12:57,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:57,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2630 states. [2021-08-25 20:12:57,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2630 to 2628. [2021-08-25 20:12:57,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 2627 states have (on average 1.5081842405786068) internal successors, (3962), 2627 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 3962 transitions. [2021-08-25 20:12:57,891 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 3962 transitions. Word has length 125 [2021-08-25 20:12:57,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:57,892 INFO L470 AbstractCegarLoop]: Abstraction has 2628 states and 3962 transitions. [2021-08-25 20:12:57,892 INFO L471 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) [2021-08-25 20:12:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 3962 transitions. [2021-08-25 20:12:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-08-25 20:12:57,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:57,896 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:57,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-08-25 20:12:57,896 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:57,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:57,897 INFO L82 PathProgramCache]: Analyzing trace with hash 357624272, now seen corresponding path program 1 times [2021-08-25 20:12:57,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:57,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258177607] [2021-08-25 20:12:57,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:57,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-08-25 20:12:57,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:57,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258177607] [2021-08-25 20:12:57,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258177607] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:57,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:57,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:57,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910796056] [2021-08-25 20:12:57,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:57,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:57,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:57,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:57,934 INFO L87 Difference]: Start difference. First operand 2628 states and 3962 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:58,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:58,158 INFO L93 Difference]: Finished difference Result 5376 states and 8099 transitions. [2021-08-25 20:12:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-08-25 20:12:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:58,168 INFO L225 Difference]: With dead ends: 5376 [2021-08-25 20:12:58,168 INFO L226 Difference]: Without dead ends: 2756 [2021-08-25 20:12:58,171 INFO L781 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 [2021-08-25 20:12:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-25 20:12:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2724. [2021-08-25 20:12:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.4972456849063533) internal successors, (4077), 2723 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4077 transitions. [2021-08-25 20:12:58,263 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4077 transitions. Word has length 133 [2021-08-25 20:12:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:58,264 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 4077 transitions. [2021-08-25 20:12:58,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4077 transitions. [2021-08-25 20:12:58,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-08-25 20:12:58,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:58,268 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:58,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-08-25 20:12:58,269 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:58,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1875401929, now seen corresponding path program 1 times [2021-08-25 20:12:58,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:58,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687015147] [2021-08-25 20:12:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:58,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-08-25 20:12:58,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:58,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687015147] [2021-08-25 20:12:58,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687015147] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:58,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:58,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:58,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148404814] [2021-08-25 20:12:58,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:58,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:58,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:58,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:58,306 INFO L87 Difference]: Start difference. First operand 2724 states and 4077 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:58,587 INFO L93 Difference]: Finished difference Result 5472 states and 8182 transitions. [2021-08-25 20:12:58,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-08-25 20:12:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:58,598 INFO L225 Difference]: With dead ends: 5472 [2021-08-25 20:12:58,598 INFO L226 Difference]: Without dead ends: 2756 [2021-08-25 20:12:58,601 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-08-25 20:12:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 2724. [2021-08-25 20:12:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.485493940506794) internal successors, (4045), 2723 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 4045 transitions. [2021-08-25 20:12:58,689 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 4045 transitions. Word has length 134 [2021-08-25 20:12:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:58,690 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 4045 transitions. [2021-08-25 20:12:58,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 4045 transitions. [2021-08-25 20:12:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-08-25 20:12:58,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:58,696 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 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, 1, 1] [2021-08-25 20:12:58,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-08-25 20:12:58,696 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:58,697 INFO L82 PathProgramCache]: Analyzing trace with hash 214407641, now seen corresponding path program 1 times [2021-08-25 20:12:58,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:58,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383138722] [2021-08-25 20:12:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:58,698 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-25 20:12:58,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:58,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383138722] [2021-08-25 20:12:58,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383138722] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:58,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:58,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:58,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436579060] [2021-08-25 20:12:58,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:58,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:58,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:58,731 INFO L87 Difference]: Start difference. First operand 2724 states and 4045 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:58,977 INFO L93 Difference]: Finished difference Result 5522 states and 8175 transitions. [2021-08-25 20:12:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:58,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-08-25 20:12:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:58,987 INFO L225 Difference]: With dead ends: 5522 [2021-08-25 20:12:58,988 INFO L226 Difference]: Without dead ends: 2806 [2021-08-25 20:12:58,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:58,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2021-08-25 20:12:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2724. [2021-08-25 20:12:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 1.4531766434080058) internal successors, (3957), 2723 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 3957 transitions. [2021-08-25 20:12:59,106 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 3957 transitions. Word has length 164 [2021-08-25 20:12:59,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:59,106 INFO L470 AbstractCegarLoop]: Abstraction has 2724 states and 3957 transitions. [2021-08-25 20:12:59,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:59,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 3957 transitions. [2021-08-25 20:12:59,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-08-25 20:12:59,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:59,111 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1] [2021-08-25 20:12:59,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-25 20:12:59,112 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:59,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1161445527, now seen corresponding path program 1 times [2021-08-25 20:12:59,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:59,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901539285] [2021-08-25 20:12:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:59,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-08-25 20:12:59,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:59,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901539285] [2021-08-25 20:12:59,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901539285] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:12:59,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 20:12:59,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 20:12:59,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288174975] [2021-08-25 20:12:59,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:12:59,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:12:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:12:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:59,148 INFO L87 Difference]: Start difference. First operand 2724 states and 3957 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:59,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:12:59,378 INFO L93 Difference]: Finished difference Result 5712 states and 8274 transitions. [2021-08-25 20:12:59,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:12:59,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-08-25 20:12:59,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:12:59,402 INFO L225 Difference]: With dead ends: 5712 [2021-08-25 20:12:59,403 INFO L226 Difference]: Without dead ends: 2996 [2021-08-25 20:12:59,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 20:12:59,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2021-08-25 20:12:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2840. [2021-08-25 20:12:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.424797463895738) internal successors, (4045), 2839 states have internal predecessors, (4045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:59,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4045 transitions. [2021-08-25 20:12:59,513 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4045 transitions. Word has length 164 [2021-08-25 20:12:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:12:59,513 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4045 transitions. [2021-08-25 20:12:59,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:12:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4045 transitions. [2021-08-25 20:12:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-25 20:12:59,518 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:12:59,518 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:12:59,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-25 20:12:59,519 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:12:59,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:12:59,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2016709837, now seen corresponding path program 1 times [2021-08-25 20:12:59,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:12:59,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596270137] [2021-08-25 20:12:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:59,520 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:12:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-08-25 20:12:59,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:12:59,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596270137] [2021-08-25 20:12:59,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596270137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 20:12:59,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9934850] [2021-08-25 20:12:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:12:59,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:12:59,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:12:59,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 20:12:59,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 20:12:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:12:59,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 20:12:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 20:13:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-08-25 20:13:00,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9934850] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:00,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 20:13:00,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 20:13:00,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094946306] [2021-08-25 20:13:00,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:00,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:00,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:00,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:00,412 INFO L87 Difference]: Start difference. First operand 2840 states and 4045 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) [2021-08-25 20:13:00,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:00,546 INFO L93 Difference]: Finished difference Result 8485 states and 12072 transitions. [2021-08-25 20:13:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:00,547 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 172 [2021-08-25 20:13:00,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:00,559 INFO L225 Difference]: With dead ends: 8485 [2021-08-25 20:13:00,560 INFO L226 Difference]: Without dead ends: 5653 [2021-08-25 20:13:00,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:00,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5653 states. [2021-08-25 20:13:00,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5653 to 5651. [2021-08-25 20:13:00,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5651 states, 5650 states have (on average 1.4219469026548672) internal successors, (8034), 5650 states have internal predecessors, (8034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:00,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5651 states to 5651 states and 8034 transitions. [2021-08-25 20:13:00,798 INFO L78 Accepts]: Start accepts. Automaton has 5651 states and 8034 transitions. Word has length 172 [2021-08-25 20:13:00,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:00,798 INFO L470 AbstractCegarLoop]: Abstraction has 5651 states and 8034 transitions. [2021-08-25 20:13:00,799 INFO L471 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) [2021-08-25 20:13:00,799 INFO L276 IsEmpty]: Start isEmpty. Operand 5651 states and 8034 transitions. [2021-08-25 20:13:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-08-25 20:13:00,806 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:00,806 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:00,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 20:13:01,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:01,032 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:01,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:01,033 INFO L82 PathProgramCache]: Analyzing trace with hash 594356241, now seen corresponding path program 1 times [2021-08-25 20:13:01,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:01,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259651823] [2021-08-25 20:13:01,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:01,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 155 proven. 11 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-08-25 20:13:01,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:01,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259651823] [2021-08-25 20:13:01,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259651823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 20:13:01,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960825857] [2021-08-25 20:13:01,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:01,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:01,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:01,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 20:13:01,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 20:13:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:01,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 20:13:01,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 20:13:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-08-25 20:13:01,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960825857] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:01,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 20:13:01,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 20:13:01,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673007317] [2021-08-25 20:13:01,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:01,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:01,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:01,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:01,858 INFO L87 Difference]: Start difference. First operand 5651 states and 8034 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) [2021-08-25 20:13:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:02,275 INFO L93 Difference]: Finished difference Result 11837 states and 16799 transitions. [2021-08-25 20:13:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:02,276 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 173 [2021-08-25 20:13:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:02,289 INFO L225 Difference]: With dead ends: 11837 [2021-08-25 20:13:02,289 INFO L226 Difference]: Without dead ends: 5995 [2021-08-25 20:13:02,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5995 states. [2021-08-25 20:13:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5995 to 5835. [2021-08-25 20:13:02,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5835 states, 5834 states have (on average 1.4168666438121358) internal successors, (8266), 5834 states have internal predecessors, (8266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5835 states to 5835 states and 8266 transitions. [2021-08-25 20:13:02,529 INFO L78 Accepts]: Start accepts. Automaton has 5835 states and 8266 transitions. Word has length 173 [2021-08-25 20:13:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:02,530 INFO L470 AbstractCegarLoop]: Abstraction has 5835 states and 8266 transitions. [2021-08-25 20:13:02,530 INFO L471 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) [2021-08-25 20:13:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5835 states and 8266 transitions. [2021-08-25 20:13:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-08-25 20:13:02,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:02,539 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:02,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 20:13:02,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-25 20:13:02,766 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:02,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:02,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1057591537, now seen corresponding path program 1 times [2021-08-25 20:13:02,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:02,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145392359] [2021-08-25 20:13:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:02,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-08-25 20:13:02,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:02,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145392359] [2021-08-25 20:13:02,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145392359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 20:13:02,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756005904] [2021-08-25 20:13:02,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:02,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:02,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:02,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 20:13:02,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 20:13:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:03,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 20:13:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 20:13:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-08-25 20:13:03,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756005904] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:03,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 20:13:03,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 20:13:03,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514133388] [2021-08-25 20:13:03,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:03,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:03,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:03,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:03,786 INFO L87 Difference]: Start difference. First operand 5835 states and 8266 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:04,064 INFO L93 Difference]: Finished difference Result 10594 states and 14958 transitions. [2021-08-25 20:13:04,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2021-08-25 20:13:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:04,080 INFO L225 Difference]: With dead ends: 10594 [2021-08-25 20:13:04,080 INFO L226 Difference]: Without dead ends: 4616 [2021-08-25 20:13:04,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4616 states. [2021-08-25 20:13:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4616 to 4472. [2021-08-25 20:13:04,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4472 states, 4471 states have (on average 1.4146723328114517) internal successors, (6325), 4471 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 6325 transitions. [2021-08-25 20:13:04,231 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 6325 transitions. Word has length 174 [2021-08-25 20:13:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:04,231 INFO L470 AbstractCegarLoop]: Abstraction has 4472 states and 6325 transitions. [2021-08-25 20:13:04,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 6325 transitions. [2021-08-25 20:13:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-08-25 20:13:04,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:04,238 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:04,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 20:13:04,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:04,455 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:04,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:04,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1886384411, now seen corresponding path program 1 times [2021-08-25 20:13:04,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:04,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241605617] [2021-08-25 20:13:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:04,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 151 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-08-25 20:13:04,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:04,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241605617] [2021-08-25 20:13:04,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241605617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 20:13:04,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437980075] [2021-08-25 20:13:04,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:04,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:04,608 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 20:13:04,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 20:13:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 20:13:05,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 20:13:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-08-25 20:13:05,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437980075] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:05,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 20:13:05,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-08-25 20:13:05,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322361566] [2021-08-25 20:13:05,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:05,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:05,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-25 20:13:05,586 INFO L87 Difference]: Start difference. First operand 4472 states and 6325 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:05,708 INFO L93 Difference]: Finished difference Result 8871 states and 12552 transitions. [2021-08-25 20:13:05,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:05,709 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 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 177 [2021-08-25 20:13:05,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:05,718 INFO L225 Difference]: With dead ends: 8871 [2021-08-25 20:13:05,718 INFO L226 Difference]: Without dead ends: 4474 [2021-08-25 20:13:05,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-25 20:13:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4474 states. [2021-08-25 20:13:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4474 to 4472. [2021-08-25 20:13:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4472 states, 4471 states have (on average 1.4110937150525609) internal successors, (6309), 4471 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4472 states to 4472 states and 6309 transitions. [2021-08-25 20:13:05,858 INFO L78 Accepts]: Start accepts. Automaton has 4472 states and 6309 transitions. Word has length 177 [2021-08-25 20:13:05,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:05,858 INFO L470 AbstractCegarLoop]: Abstraction has 4472 states and 6309 transitions. [2021-08-25 20:13:05,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:05,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4472 states and 6309 transitions. [2021-08-25 20:13:05,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-08-25 20:13:05,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:05,865 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:05,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 20:13:06,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:06,080 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:06,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2144549849, now seen corresponding path program 1 times [2021-08-25 20:13:06,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:06,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963663032] [2021-08-25 20:13:06,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 151 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-08-25 20:13:06,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:06,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963663032] [2021-08-25 20:13:06,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963663032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 20:13:06,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525759504] [2021-08-25 20:13:06,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:06,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:06,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:06,176 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 20:13:06,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 20:13:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:06,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 20:13:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 20:13:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-08-25 20:13:07,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525759504] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:07,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 20:13:07,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-08-25 20:13:07,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317077343] [2021-08-25 20:13:07,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:07,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:07,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:07,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-25 20:13:07,035 INFO L87 Difference]: Start difference. First operand 4472 states and 6309 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) [2021-08-25 20:13:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:07,265 INFO L93 Difference]: Finished difference Result 7804 states and 10978 transitions. [2021-08-25 20:13:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:07,266 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 177 [2021-08-25 20:13:07,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:07,272 INFO L225 Difference]: With dead ends: 7804 [2021-08-25 20:13:07,273 INFO L226 Difference]: Without dead ends: 3299 [2021-08-25 20:13:07,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-25 20:13:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3299 states. [2021-08-25 20:13:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3299 to 3179. [2021-08-25 20:13:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 1.4059156702328508) internal successors, (4468), 3178 states have internal predecessors, (4468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:07,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 4468 transitions. [2021-08-25 20:13:07,401 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 4468 transitions. Word has length 177 [2021-08-25 20:13:07,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:07,401 INFO L470 AbstractCegarLoop]: Abstraction has 3179 states and 4468 transitions. [2021-08-25 20:13:07,402 INFO L471 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) [2021-08-25 20:13:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 4468 transitions. [2021-08-25 20:13:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-08-25 20:13:07,408 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:07,408 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:07,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 20:13:07,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-25 20:13:07,633 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:07,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1199573560, now seen corresponding path program 2 times [2021-08-25 20:13:07,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:07,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609406350] [2021-08-25 20:13:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:07,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:07,693 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 191 proven. 19 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-08-25 20:13:07,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:07,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609406350] [2021-08-25 20:13:07,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609406350] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 20:13:07,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687207036] [2021-08-25 20:13:07,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 20:13:07,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:07,696 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 20:13:07,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 20:13:08,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-25 20:13:08,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 20:13:08,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 20:13:08,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 20:13:08,537 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2021-08-25 20:13:08,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687207036] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:08,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 20:13:08,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 20:13:08,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662311342] [2021-08-25 20:13:08,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:08,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:08,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:08,539 INFO L87 Difference]: Start difference. First operand 3179 states and 4468 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) [2021-08-25 20:13:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:08,754 INFO L93 Difference]: Finished difference Result 6415 states and 9031 transitions. [2021-08-25 20:13:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:08,755 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 182 [2021-08-25 20:13:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:08,763 INFO L225 Difference]: With dead ends: 6415 [2021-08-25 20:13:08,763 INFO L226 Difference]: Without dead ends: 3363 [2021-08-25 20:13:08,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2021-08-25 20:13:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3179. [2021-08-25 20:13:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 1.4008810572687225) internal successors, (4452), 3178 states have internal predecessors, (4452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 4452 transitions. [2021-08-25 20:13:08,876 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 4452 transitions. Word has length 182 [2021-08-25 20:13:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:08,876 INFO L470 AbstractCegarLoop]: Abstraction has 3179 states and 4452 transitions. [2021-08-25 20:13:08,876 INFO L471 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) [2021-08-25 20:13:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 4452 transitions. [2021-08-25 20:13:08,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-08-25 20:13:08,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:08,882 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:08,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 20:13:09,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:09,107 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:09,107 INFO L82 PathProgramCache]: Analyzing trace with hash -97142242, now seen corresponding path program 1 times [2021-08-25 20:13:09,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:09,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113163049] [2021-08-25 20:13:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:09,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:09,291 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 195 proven. 23 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-08-25 20:13:09,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:09,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113163049] [2021-08-25 20:13:09,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113163049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 20:13:09,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399577339] [2021-08-25 20:13:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:09,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:09,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:09,297 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 20:13:09,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 20:13:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 20:13:09,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 20:13:10,228 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2021-08-25 20:13:10,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399577339] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:10,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 20:13:10,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 20:13:10,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068571863] [2021-08-25 20:13:10,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 20:13:10,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:10,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 20:13:10,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:10,230 INFO L87 Difference]: Start difference. First operand 3179 states and 4452 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) [2021-08-25 20:13:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:10,466 INFO L93 Difference]: Finished difference Result 6311 states and 8831 transitions. [2021-08-25 20:13:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 20:13:10,466 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 184 [2021-08-25 20:13:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:10,472 INFO L225 Difference]: With dead ends: 6311 [2021-08-25 20:13:10,472 INFO L226 Difference]: Without dead ends: 3275 [2021-08-25 20:13:10,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-25 20:13:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3275 states. [2021-08-25 20:13:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3275 to 3179. [2021-08-25 20:13:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 1.3958464443045941) internal successors, (4436), 3178 states have internal predecessors, (4436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 4436 transitions. [2021-08-25 20:13:10,598 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 4436 transitions. Word has length 184 [2021-08-25 20:13:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:10,598 INFO L470 AbstractCegarLoop]: Abstraction has 3179 states and 4436 transitions. [2021-08-25 20:13:10,599 INFO L471 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) [2021-08-25 20:13:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 4436 transitions. [2021-08-25 20:13:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-08-25 20:13:10,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:10,602 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:10,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 20:13:10,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:10,817 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:10,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:10,817 INFO L82 PathProgramCache]: Analyzing trace with hash -301230506, now seen corresponding path program 3 times [2021-08-25 20:13:10,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:10,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072751328] [2021-08-25 20:13:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:10,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 20:13:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 196 proven. 27 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-08-25 20:13:10,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 20:13:10,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072751328] [2021-08-25 20:13:10,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072751328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 20:13:10,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953362061] [2021-08-25 20:13:10,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 20:13:10,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 20:13:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 20:13:10,871 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 20:13:10,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 20:13:11,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-08-25 20:13:11,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 20:13:11,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 20:13:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 20:13:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-08-25 20:13:11,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953362061] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 20:13:11,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 20:13:11,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-08-25 20:13:11,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549582145] [2021-08-25 20:13:11,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 20:13:11,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 20:13:11,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 20:13:11,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-25 20:13:11,905 INFO L87 Difference]: Start difference. First operand 3179 states and 4436 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:12,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 20:13:12,110 INFO L93 Difference]: Finished difference Result 6549 states and 9060 transitions. [2021-08-25 20:13:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 20:13:12,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 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 189 [2021-08-25 20:13:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 20:13:12,115 INFO L225 Difference]: With dead ends: 6549 [2021-08-25 20:13:12,116 INFO L226 Difference]: Without dead ends: 3561 [2021-08-25 20:13:12,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-25 20:13:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-08-25 20:13:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 3171. [2021-08-25 20:13:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 3170 states have (on average 1.3943217665615142) internal successors, (4420), 3170 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 4420 transitions. [2021-08-25 20:13:12,232 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 4420 transitions. Word has length 189 [2021-08-25 20:13:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 20:13:12,232 INFO L470 AbstractCegarLoop]: Abstraction has 3171 states and 4420 transitions. [2021-08-25 20:13:12,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 20:13:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 4420 transitions. [2021-08-25 20:13:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-08-25 20:13:12,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 20:13:12,236 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 20:13:12,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 20:13:12,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-25 20:13:12,453 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 20:13:12,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 20:13:12,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2051917229, now seen corresponding path program 1 times [2021-08-25 20:13:12,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 20:13:12,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425463254] [2021-08-25 20:13:12,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 20:13:12,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 20:13:12,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 20:13:12,522 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 20:13:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 20:13:12,723 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 20:13:12,724 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 20:13:12,725 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 20:13:12,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-08-25 20:13:12,747 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 20:13:12,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 08:13:12 BoogieIcfgContainer [2021-08-25 20:13:12,934 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 20:13:12,935 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 20:13:12,935 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 20:13:12,935 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 20:13:12,935 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 08:12:51" (3/4) ... [2021-08-25 20:13:12,937 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 20:13:13,096 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 20:13:13,097 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 20:13:13,098 INFO L168 Benchmark]: Toolchain (without parser) took 22430.28 ms. Allocated memory was 54.5 MB in the beginning and 721.4 MB in the end (delta: 666.9 MB). Free memory was 39.2 MB in the beginning and 546.6 MB in the end (delta: -507.4 MB). Peak memory consumption was 158.0 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:13,099 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 44.0 MB. Free memory was 26.6 MB in the beginning and 26.6 MB in the end (delta: 28.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 20:13:13,099 INFO L168 Benchmark]: CACSL2BoogieTranslator took 364.76 ms. Allocated memory is still 54.5 MB. Free memory was 38.9 MB in the beginning and 33.0 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:13,100 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.84 ms. Allocated memory is still 54.5 MB. Free memory was 33.0 MB in the beginning and 30.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:13,100 INFO L168 Benchmark]: Boogie Preprocessor took 45.42 ms. Allocated memory is still 54.5 MB. Free memory was 30.0 MB in the beginning and 27.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:13,100 INFO L168 Benchmark]: RCFGBuilder took 716.07 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 27.9 MB in the beginning and 43.5 MB in the end (delta: -15.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:13,101 INFO L168 Benchmark]: TraceAbstraction took 21087.79 ms. Allocated memory was 67.1 MB in the beginning and 721.4 MB in the end (delta: 654.3 MB). Free memory was 42.8 MB in the beginning and 568.6 MB in the end (delta: -525.8 MB). Peak memory consumption was 128.6 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:13,104 INFO L168 Benchmark]: Witness Printer took 162.09 ms. Allocated memory is still 721.4 MB. Free memory was 568.6 MB in the beginning and 546.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-08-25 20:13:13,107 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 44.0 MB. Free memory was 26.6 MB in the beginning and 26.6 MB in the end (delta: 28.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 364.76 ms. Allocated memory is still 54.5 MB. Free memory was 38.9 MB in the beginning and 33.0 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.84 ms. Allocated memory is still 54.5 MB. Free memory was 33.0 MB in the beginning and 30.1 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.42 ms. Allocated memory is still 54.5 MB. Free memory was 30.0 MB in the beginning and 27.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 716.07 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 27.9 MB in the beginning and 43.5 MB in the end (delta: -15.6 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21087.79 ms. Allocated memory was 67.1 MB in the beginning and 721.4 MB in the end (delta: 654.3 MB). Free memory was 42.8 MB in the beginning and 568.6 MB in the end (delta: -525.8 MB). Peak memory consumption was 128.6 MB. Max. memory is 16.1 GB. * Witness Printer took 162.09 ms. Allocated memory is still 721.4 MB. Free memory was 568.6 MB in the beginning and 546.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 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: 632]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L637] int s ; [L638] int tmp ; [L642] s = 8464 [L14] int s__info_callback = __VERIFIER_nondet_int() ; [L15] int s__in_handshake = __VERIFIER_nondet_int() ; [L16] int s__state ; [L17] int s__new_session ; [L18] int s__server ; [L19] int s__version = __VERIFIER_nondet_int() ; [L20] int s__type ; [L21] int s__init_num ; [L22] int s__hit = __VERIFIER_nondet_int() ; [L23] int s__rwstate ; [L24] int s__init_buf___0 = 1; [L25] int s__debug = __VERIFIER_nondet_int() ; [L26] int s__shutdown ; [L27] int s__cert = __VERIFIER_nondet_int() ; [L28] int s__options = __VERIFIER_nondet_int() ; [L29] int s__verify_mode = __VERIFIER_nondet_int() ; [L30] int s__session__peer = __VERIFIER_nondet_int() ; [L31] int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ; [L32] int s__ctx__info_callback = __VERIFIER_nondet_int() ; [L33] int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ; [L34] int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ; [L35] int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ; [L36] int s__s3__tmp__cert_request ; [L37] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int() ; [L38] int s__s3__tmp__use_rsa_tmp ; [L39] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ; [L40] int s__s3__tmp__new_cipher__algorithms ; [L41] int s__s3__tmp__next_state___0 ; [L42] int s__s3__tmp__new_cipher__algo_strength ; [L43] int s__session__cipher ; [L44] int buf ; [L45] unsigned long l ; [L46] unsigned long Time ; [L47] unsigned long tmp ; [L48] int cb ; [L49] long num1 = __VERIFIER_nondet_long() ; [L50] int ret ; [L51] int new_state ; [L52] int state ; [L53] int skip ; [L54] int got_new_session ; [L55] int tmp___1 = __VERIFIER_nondet_int() ; [L56] int tmp___2 = __VERIFIER_nondet_int() ; [L57] int tmp___3 = __VERIFIER_nondet_int() ; [L58] int tmp___4 = __VERIFIER_nondet_int() ; [L59] int tmp___5 = __VERIFIER_nondet_int() ; [L60] int tmp___6 = __VERIFIER_nondet_int() ; [L61] int tmp___7 = __VERIFIER_nondet_int() ; [L62] long tmp___8 = __VERIFIER_nondet_long() ; [L63] int tmp___9 = __VERIFIER_nondet_int() ; [L64] int tmp___10 = __VERIFIER_nondet_int() ; [L65] int blastFlag ; [L66] int __cil_tmp55 ; [L67] unsigned long __cil_tmp56 ; [L68] unsigned long __cil_tmp57 ; [L69] unsigned long __cil_tmp58 = __VERIFIER_nondet_ulong() ; [L70] unsigned long __cil_tmp59 ; [L71] int __cil_tmp60 ; [L72] unsigned long __cil_tmp61 ; [L75] s__state = initial_state [L76] blastFlag = 0 [L77] tmp = __VERIFIER_nondet_int() [L78] Time = tmp [L79] cb = 0 [L80] ret = -1 [L81] skip = 0 [L82] got_new_session = 0 [L83] COND TRUE s__info_callback != 0 [L84] cb = s__info_callback [L90] s__in_handshake ++ [L91] COND TRUE tmp___1 + 12288 [L92] COND TRUE tmp___2 + 16384 [L96] COND FALSE !(s__cert == 0) [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND TRUE s__state == 8464 [L273] s__shutdown = 0 [L274] ret = __VERIFIER_nondet_int() [L275] COND TRUE blastFlag == 0 [L276] blastFlag = 1 [L278] COND FALSE !(ret <= 0) [L281] got_new_session = 1 [L282] s__state = 8496 [L283] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND TRUE s__state == 8496 [L287] ret = __VERIFIER_nondet_int() [L288] COND TRUE blastFlag == 1 [L289] blastFlag = 2 [L295] COND FALSE !(ret <= 0) [L298] COND FALSE !(\read(s__hit)) [L301] s__state = 8512 [L303] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND TRUE s__state == 8512 [L308] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L309] __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L310] COND TRUE __cil_tmp56 + 256UL [L311] skip = 1 [L319] s__state = 8528 [L320] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND FALSE !(s__state == 8512) [L145] COND FALSE !(s__state == 8513) [L148] COND TRUE s__state == 8528 [L324] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L325] l = (unsigned long )s__s3__tmp__new_cipher__algorithms [L327] __cil_tmp57 = (unsigned long )s__options [L328] COND TRUE __cil_tmp57 + 2097152UL [L329] s__s3__tmp__use_rsa_tmp = 1 [L334] COND TRUE \read(s__s3__tmp__use_rsa_tmp) [L361] ret = __VERIFIER_nondet_int() [L362] COND FALSE !(ret <= 0) [L379] s__state = 8544 [L380] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND FALSE !(s__state == 8512) [L145] COND FALSE !(s__state == 8513) [L148] COND FALSE !(s__state == 8528) [L151] COND FALSE !(s__state == 8529) [L154] COND TRUE s__state == 8544 [L384] COND TRUE s__verify_mode + 1 [L385] COND FALSE !(s__session__peer != 0) [L396] s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() [L397] __cil_tmp61 = (unsigned long )s__s3__tmp__new_cipher__algorithms [L398] COND FALSE !(__cil_tmp61 + 256UL) [L408] s__s3__tmp__cert_request = 1 [L409] ret = __VERIFIER_nondet_int() [L410] COND FALSE !(ret <= 0) [L413] s__state = 8448 [L414] s__s3__tmp__next_state___0 = 8576 [L415] s__init_num = 0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND FALSE !(s__state == 8512) [L145] COND FALSE !(s__state == 8513) [L148] COND FALSE !(s__state == 8528) [L151] COND FALSE !(s__state == 8529) [L154] COND FALSE !(s__state == 8544) [L157] COND FALSE !(s__state == 8545) [L160] COND FALSE !(s__state == 8560) [L163] COND FALSE !(s__state == 8561) [L166] COND TRUE s__state == 8448 [L436] COND FALSE !(num1 > 0L) [L445] s__state = s__s3__tmp__next_state___0 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND FALSE !(state == 8576) [L621] skip = 0 [L100] COND TRUE 1 [L102] state = s__state [L103] COND FALSE !(s__state == 12292) [L106] COND FALSE !(s__state == 16384) [L109] COND FALSE !(s__state == 8192) [L112] COND FALSE !(s__state == 24576) [L115] COND FALSE !(s__state == 8195) [L118] COND FALSE !(s__state == 8480) [L121] COND FALSE !(s__state == 8481) [L124] COND FALSE !(s__state == 8482) [L127] COND FALSE !(s__state == 8464) [L130] COND FALSE !(s__state == 8465) [L133] COND FALSE !(s__state == 8466) [L136] COND FALSE !(s__state == 8496) [L139] COND FALSE !(s__state == 8497) [L142] COND FALSE !(s__state == 8512) [L145] COND FALSE !(s__state == 8513) [L148] COND FALSE !(s__state == 8528) [L151] COND FALSE !(s__state == 8529) [L154] COND FALSE !(s__state == 8544) [L157] COND FALSE !(s__state == 8545) [L160] COND FALSE !(s__state == 8560) [L163] COND FALSE !(s__state == 8561) [L166] COND FALSE !(s__state == 8448) [L169] COND TRUE s__state == 8576 [L449] ret = __VERIFIER_nondet_int() [L450] COND FALSE !(ret <= 0) [L453] COND FALSE !(ret == 2) [L456] ret = __VERIFIER_nondet_int() [L457] COND FALSE !(ret <= 0) [L460] s__init_num = 0 [L461] s__state = 8592 [L586] COND FALSE !(! s__s3__tmp__reuse_message) [L604] COND TRUE state == 8576 [L605] COND TRUE s__state == 8592 [L606] COND TRUE tmp___1 != -12288 [L607] COND TRUE tmp___2 != -16384 [L608] COND TRUE __cil_tmp56 != 4294967040 [L609] COND TRUE __cil_tmp58 != 4294967294 [L610] COND TRUE tmp___7 != 1024 [L611] COND TRUE tmp___7 != 512 [L632] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 149 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 20839.0ms, OverallIterations: 38, TraceHistogramMax: 7, EmptinessCheckTime: 113.7ms, AutomataDifference: 6980.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6459 SDtfs, 5740 SDslu, 2456 SDs, 0 SdLazy, 3268 SolverSat, 1244 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3329.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1549 GetRequests, 1488 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 227.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5835occurred in iteration=31, InterpolantAutomatonStates: 115, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2221.6ms AutomataMinimizationTime, 37 MinimizatonAttempts, 1605 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 280.7ms SsaConstructionTime, 836.3ms SatisfiabilityAnalysisTime, 5517.5ms InterpolantComputationTime, 5451 NumberOfCodeBlocks, 5159 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 5214 ConstructedInterpolants, 0 QuantifiedInterpolants, 8871 SizeOfPredicates, 1 NumberOfNonLiveVariables, 2643 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 45 InterpolantComputations, 37 PerfectInterpolantSequences, 6988/7241 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-25 20:13:13,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...