./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/psyco/psyco_abp_1-3.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/psyco/psyco_abp_1-3.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 0db572bf30caf92f48b0dba5a9cc25cec23b8ac8 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 23:17:57,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 23:17:57,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 23:17:57,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 23:17:57,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 23:17:57,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 23:17:57,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 23:17:57,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 23:17:57,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 23:17:57,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 23:17:57,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 23:17:57,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 23:17:57,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 23:17:57,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 23:17:57,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 23:17:57,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 23:17:57,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 23:17:57,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 23:17:57,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 23:17:57,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 23:17:57,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 23:17:57,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 23:17:57,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 23:17:57,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 23:17:57,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 23:17:57,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 23:17:57,462 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 23:17:57,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 23:17:57,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 23:17:57,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 23:17:57,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 23:17:57,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 23:17:57,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 23:17:57,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 23:17:57,465 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 23:17:57,465 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 23:17:57,466 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 23:17:57,466 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 23:17:57,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 23:17:57,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 23:17:57,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 23:17:57,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 23:17:57,504 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 23:17:57,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 23:17:57,505 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 23:17:57,505 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 23:17:57,506 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 23:17:57,506 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 23:17:57,506 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 23:17:57,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 23:17:57,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 23:17:57,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 23:17:57,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 23:17:57,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 23:17:57,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 23:17:57,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 23:17:57,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 23:17:57,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 23:17:57,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 23:17:57,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 23:17:57,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 23:17:57,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 23:17:57,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 23:17:57,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 23:17:57,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 23:17:57,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 23:17:57,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 23:17:57,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 23:17:57,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 23:17:57,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 23:17:57,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 23:17:57,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 23:17:57,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0db572bf30caf92f48b0dba5a9cc25cec23b8ac8 [2021-08-25 23:17:57,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 23:17:57,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 23:17:57,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 23:17:57,781 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 23:17:57,781 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 23:17:57,782 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/psyco/psyco_abp_1-3.c [2021-08-25 23:17:57,825 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ed38c7f/6a19d0ac2777447b94c4e2bff0ea7815/FLAG51313995f [2021-08-25 23:17:58,149 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 23:17:58,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/psyco/psyco_abp_1-3.c [2021-08-25 23:17:58,160 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ed38c7f/6a19d0ac2777447b94c4e2bff0ea7815/FLAG51313995f [2021-08-25 23:17:58,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0ed38c7f/6a19d0ac2777447b94c4e2bff0ea7815 [2021-08-25 23:17:58,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 23:17:58,552 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 23:17:58,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 23:17:58,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 23:17:58,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 23:17:58,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d93913e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58, skipping insertion in model container [2021-08-25 23:17:58,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 23:17:58,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 23:17:58,748 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/psyco/psyco_abp_1-3.c[24720,24733] [2021-08-25 23:17:58,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 23:17:58,758 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 23:17:58,820 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/psyco/psyco_abp_1-3.c[24720,24733] [2021-08-25 23:17:58,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 23:17:58,831 INFO L208 MainTranslator]: Completed translation [2021-08-25 23:17:58,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58 WrapperNode [2021-08-25 23:17:58,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 23:17:58,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 23:17:58,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 23:17:58,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 23:17:58,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,903 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 23:17:58,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 23:17:58,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 23:17:58,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 23:17:58,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 23:17:58,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 23:17:58,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 23:17:58,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 23:17:58,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (1/1) ... [2021-08-25 23:17:58,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 23:17:58,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 23:17:58,994 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 23:17:59,012 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 23:17:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 23:17:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 23:17:59,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 23:17:59,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 23:17:59,583 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 23:17:59,583 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-25 23:17:59,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:17:59 BoogieIcfgContainer [2021-08-25 23:17:59,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 23:17:59,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 23:17:59,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 23:17:59,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 23:17:59,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 11:17:58" (1/3) ... [2021-08-25 23:17:59,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db7df0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 11:17:59, skipping insertion in model container [2021-08-25 23:17:59,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 11:17:58" (2/3) ... [2021-08-25 23:17:59,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db7df0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 11:17:59, skipping insertion in model container [2021-08-25 23:17:59,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:17:59" (3/3) ... [2021-08-25 23:17:59,590 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-3.c [2021-08-25 23:17:59,593 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 23:17:59,593 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 23:17:59,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 23:17:59,631 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 23:17:59,631 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 23:17:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 108 states have internal predecessors, (209), 0 states have call successors, (0), 0 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 23:17:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-25 23:17:59,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:17:59,648 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:17:59,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:17:59,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:17:59,652 INFO L82 PathProgramCache]: Analyzing trace with hash 352571511, now seen corresponding path program 1 times [2021-08-25 23:17:59,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:17:59,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502339291] [2021-08-25 23:17:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:17:59,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:17:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:17:59,799 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 23:17:59,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:17:59,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502339291] [2021-08-25 23:17:59,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502339291] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:17:59,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:17:59,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 23:17:59,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378426409] [2021-08-25 23:17:59,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 23:17:59,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:17:59,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 23:17:59,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 23:17:59,822 INFO L87 Difference]: Start difference. First operand has 109 states, 107 states have (on average 1.9532710280373833) internal successors, (209), 108 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 23:17:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:17:59,851 INFO L93 Difference]: Finished difference Result 216 states and 416 transitions. [2021-08-25 23:17:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 23:17:59,855 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-08-25 23:17:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:17:59,862 INFO L225 Difference]: With dead ends: 216 [2021-08-25 23:17:59,862 INFO L226 Difference]: Without dead ends: 100 [2021-08-25 23:17:59,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 23:17:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-25 23:17:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-25 23:17:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 99 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 23:17:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 165 transitions. [2021-08-25 23:17:59,901 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 165 transitions. Word has length 9 [2021-08-25 23:17:59,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:17:59,902 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 165 transitions. [2021-08-25 23:17:59,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 23:17:59,902 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 165 transitions. [2021-08-25 23:17:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-25 23:17:59,904 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:17:59,904 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:17:59,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 23:17:59,904 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:17:59,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:17:59,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1422697561, now seen corresponding path program 1 times [2021-08-25 23:17:59,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:17:59,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193344978] [2021-08-25 23:17:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:17:59,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:17:59,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:17:59,968 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 23:17:59,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:17:59,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193344978] [2021-08-25 23:17:59,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193344978] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:17:59,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:17:59,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 23:17:59,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590919103] [2021-08-25 23:17:59,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:17:59,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:17:59,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:17:59,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:17:59,973 INFO L87 Difference]: Start difference. First operand 100 states and 165 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 23:18:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:00,014 INFO L93 Difference]: Finished difference Result 201 states and 332 transitions. [2021-08-25 23:18:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:00,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-08-25 23:18:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:00,018 INFO L225 Difference]: With dead ends: 201 [2021-08-25 23:18:00,018 INFO L226 Difference]: Without dead ends: 103 [2021-08-25 23:18:00,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:00,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-25 23:18:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-08-25 23:18:00,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.6470588235294117) internal successors, (168), 102 states have internal predecessors, (168), 0 states have call successors, (0), 0 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 23:18:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 168 transitions. [2021-08-25 23:18:00,031 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 168 transitions. Word has length 10 [2021-08-25 23:18:00,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:00,032 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 168 transitions. [2021-08-25 23:18:00,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 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 23:18:00,032 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 168 transitions. [2021-08-25 23:18:00,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-25 23:18:00,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:00,033 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:18:00,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-25 23:18:00,033 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:00,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:00,035 INFO L82 PathProgramCache]: Analyzing trace with hash 658032730, now seen corresponding path program 1 times [2021-08-25 23:18:00,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:00,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658615172] [2021-08-25 23:18:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:00,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:00,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:00,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658615172] [2021-08-25 23:18:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658615172] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:18:00,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:18:00,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 23:18:00,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637612340] [2021-08-25 23:18:00,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:18:00,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:18:00,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:00,134 INFO L87 Difference]: Start difference. First operand 103 states and 168 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 23:18:00,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:00,215 INFO L93 Difference]: Finished difference Result 205 states and 334 transitions. [2021-08-25 23:18:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-08-25 23:18:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:00,216 INFO L225 Difference]: With dead ends: 205 [2021-08-25 23:18:00,216 INFO L226 Difference]: Without dead ends: 186 [2021-08-25 23:18:00,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:00,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-08-25 23:18:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 172. [2021-08-25 23:18:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.6432748538011697) internal successors, (281), 171 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 23:18:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 281 transitions. [2021-08-25 23:18:00,230 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 281 transitions. Word has length 15 [2021-08-25 23:18:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:00,230 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 281 transitions. [2021-08-25 23:18:00,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 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 23:18:00,231 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 281 transitions. [2021-08-25 23:18:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-25 23:18:00,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:00,231 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:18:00,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 23:18:00,231 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:00,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1675425412, now seen corresponding path program 1 times [2021-08-25 23:18:00,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:00,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482651758] [2021-08-25 23:18:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:00,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:00,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:00,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482651758] [2021-08-25 23:18:00,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482651758] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:18:00,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:18:00,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 23:18:00,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689601027] [2021-08-25 23:18:00,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:18:00,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:18:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:00,290 INFO L87 Difference]: Start difference. First operand 172 states and 281 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 23:18:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:00,317 INFO L93 Difference]: Finished difference Result 293 states and 477 transitions. [2021-08-25 23:18:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:00,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-08-25 23:18:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:00,318 INFO L225 Difference]: With dead ends: 293 [2021-08-25 23:18:00,318 INFO L226 Difference]: Without dead ends: 124 [2021-08-25 23:18:00,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:00,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-25 23:18:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-08-25 23:18:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.603305785123967) internal successors, (194), 121 states have internal predecessors, (194), 0 states have call successors, (0), 0 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 23:18:00,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 194 transitions. [2021-08-25 23:18:00,331 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 194 transitions. Word has length 16 [2021-08-25 23:18:00,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:00,332 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 194 transitions. [2021-08-25 23:18:00,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 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 23:18:00,332 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 194 transitions. [2021-08-25 23:18:00,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-25 23:18:00,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:00,334 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:18:00,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 23:18:00,334 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:00,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:00,335 INFO L82 PathProgramCache]: Analyzing trace with hash -843118083, now seen corresponding path program 1 times [2021-08-25 23:18:00,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:00,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571411353] [2021-08-25 23:18:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:00,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:00,431 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 23:18:00,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:00,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571411353] [2021-08-25 23:18:00,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571411353] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:18:00,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:18:00,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 23:18:00,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612134220] [2021-08-25 23:18:00,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:18:00,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:00,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:18:00,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:00,434 INFO L87 Difference]: Start difference. First operand 122 states and 194 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 23:18:00,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:00,461 INFO L93 Difference]: Finished difference Result 226 states and 358 transitions. [2021-08-25 23:18:00,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:00,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 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 21 [2021-08-25 23:18:00,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:00,462 INFO L225 Difference]: With dead ends: 226 [2021-08-25 23:18:00,462 INFO L226 Difference]: Without dead ends: 107 [2021-08-25 23:18:00,462 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-25 23:18:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2021-08-25 23:18:00,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.5673076923076923) internal successors, (163), 104 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 23:18:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 163 transitions. [2021-08-25 23:18:00,468 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 163 transitions. Word has length 21 [2021-08-25 23:18:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:00,468 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 163 transitions. [2021-08-25 23:18:00,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 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 23:18:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 163 transitions. [2021-08-25 23:18:00,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-25 23:18:00,469 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:00,469 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:18:00,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-25 23:18:00,470 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:00,470 INFO L82 PathProgramCache]: Analyzing trace with hash -671640130, now seen corresponding path program 1 times [2021-08-25 23:18:00,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:00,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944513718] [2021-08-25 23:18:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:00,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:00,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:00,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944513718] [2021-08-25 23:18:00,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944513718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:00,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143212290] [2021-08-25 23:18:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:00,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 23:18:00,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 23:18:00,621 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 23:18:00,642 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 23:18:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:00,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 23:18:00,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 23:18:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:00,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143212290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:00,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 23:18:00,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-25 23:18:00,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436455230] [2021-08-25 23:18:00,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 23:18:00,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:00,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 23:18:00,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-25 23:18:00,831 INFO L87 Difference]: Start difference. First operand 105 states and 163 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 23:18:01,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:01,211 INFO L93 Difference]: Finished difference Result 359 states and 564 transitions. [2021-08-25 23:18:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 23:18:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-25 23:18:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:01,213 INFO L225 Difference]: With dead ends: 359 [2021-08-25 23:18:01,213 INFO L226 Difference]: Without dead ends: 319 [2021-08-25 23:18:01,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-25 23:18:01,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-25 23:18:01,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 275. [2021-08-25 23:18:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.583941605839416) internal successors, (434), 274 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 23:18:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 434 transitions. [2021-08-25 23:18:01,218 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 434 transitions. Word has length 23 [2021-08-25 23:18:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:01,218 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 434 transitions. [2021-08-25 23:18:01,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 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 23:18:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 434 transitions. [2021-08-25 23:18:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-25 23:18:01,219 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:01,219 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:18:01,239 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 23:18:01,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-25 23:18:01,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:01,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1800121285, now seen corresponding path program 1 times [2021-08-25 23:18:01,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:01,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695183935] [2021-08-25 23:18:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:01,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-25 23:18:01,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:01,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695183935] [2021-08-25 23:18:01,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695183935] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:18:01,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:18:01,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 23:18:01,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111467955] [2021-08-25 23:18:01,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:18:01,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:18:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:01,462 INFO L87 Difference]: Start difference. First operand 275 states and 434 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 23:18:01,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:01,485 INFO L93 Difference]: Finished difference Result 548 states and 861 transitions. [2021-08-25 23:18:01,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:01,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-25 23:18:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:01,486 INFO L225 Difference]: With dead ends: 548 [2021-08-25 23:18:01,487 INFO L226 Difference]: Without dead ends: 297 [2021-08-25 23:18:01,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-25 23:18:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2021-08-25 23:18:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.5442176870748299) internal successors, (454), 294 states have internal predecessors, (454), 0 states have call successors, (0), 0 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 23:18:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 454 transitions. [2021-08-25 23:18:01,494 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 454 transitions. Word has length 25 [2021-08-25 23:18:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:01,494 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 454 transitions. [2021-08-25 23:18:01,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 23:18:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 454 transitions. [2021-08-25 23:18:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-25 23:18:01,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:01,498 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 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 23:18:01,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-25 23:18:01,498 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2124865792, now seen corresponding path program 1 times [2021-08-25 23:18:01,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:01,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093183882] [2021-08-25 23:18:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:01,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:01,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:01,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093183882] [2021-08-25 23:18:01,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093183882] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:01,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225548689] [2021-08-25 23:18:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:01,578 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 23:18:01,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 23:18:01,579 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 23:18:01,596 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 23:18:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:01,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 23:18:01,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 23:18:01,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 23:18:01,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225548689] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:18:01,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 23:18:01,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-08-25 23:18:01,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391363302] [2021-08-25 23:18:01,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:18:01,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:01,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:18:01,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-25 23:18:01,792 INFO L87 Difference]: Start difference. First operand 295 states and 454 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 23:18:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:01,801 INFO L93 Difference]: Finished difference Result 298 states and 456 transitions. [2021-08-25 23:18:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:01,801 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 27 [2021-08-25 23:18:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:01,803 INFO L225 Difference]: With dead ends: 298 [2021-08-25 23:18:01,803 INFO L226 Difference]: Without dead ends: 292 [2021-08-25 23:18:01,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-25 23:18:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-25 23:18:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-08-25 23:18:01,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.5241379310344827) internal successors, (442), 290 states have internal predecessors, (442), 0 states have call successors, (0), 0 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 23:18:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 442 transitions. [2021-08-25 23:18:01,809 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 442 transitions. Word has length 27 [2021-08-25 23:18:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:01,809 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 442 transitions. [2021-08-25 23:18:01,809 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 23:18:01,809 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 442 transitions. [2021-08-25 23:18:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-25 23:18:01,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:01,810 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:18:01,829 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 23:18:02,016 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,SelfDestructingSolverStorable7 [2021-08-25 23:18:02,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash -917092134, now seen corresponding path program 1 times [2021-08-25 23:18:02,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:02,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827078398] [2021-08-25 23:18:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:02,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-25 23:18:02,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:02,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827078398] [2021-08-25 23:18:02,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827078398] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:18:02,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:18:02,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 23:18:02,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008342915] [2021-08-25 23:18:02,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:18:02,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:18:02,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:02,053 INFO L87 Difference]: Start difference. First operand 291 states and 442 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 23:18:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:02,071 INFO L93 Difference]: Finished difference Result 510 states and 775 transitions. [2021-08-25 23:18:02,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:02,071 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 33 [2021-08-25 23:18:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:02,073 INFO L225 Difference]: With dead ends: 510 [2021-08-25 23:18:02,073 INFO L226 Difference]: Without dead ends: 243 [2021-08-25 23:18:02,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-08-25 23:18:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 241. [2021-08-25 23:18:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.5041666666666667) internal successors, (361), 240 states have internal predecessors, (361), 0 states have call successors, (0), 0 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 23:18:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 361 transitions. [2021-08-25 23:18:02,078 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 361 transitions. Word has length 33 [2021-08-25 23:18:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:02,078 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 361 transitions. [2021-08-25 23:18:02,078 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 23:18:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 361 transitions. [2021-08-25 23:18:02,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-25 23:18:02,079 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:02,080 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-25 23:18:02,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 23:18:02,080 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:02,081 INFO L82 PathProgramCache]: Analyzing trace with hash 272165387, now seen corresponding path program 1 times [2021-08-25 23:18:02,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:02,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104676648] [2021-08-25 23:18:02,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:02,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-25 23:18:02,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:02,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104676648] [2021-08-25 23:18:02,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104676648] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:18:02,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:18:02,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 23:18:02,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617429976] [2021-08-25 23:18:02,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:18:02,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:02,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:18:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:02,112 INFO L87 Difference]: Start difference. First operand 241 states and 361 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 23:18:02,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:02,131 INFO L93 Difference]: Finished difference Result 424 states and 632 transitions. [2021-08-25 23:18:02,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:02,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-25 23:18:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:02,132 INFO L225 Difference]: With dead ends: 424 [2021-08-25 23:18:02,132 INFO L226 Difference]: Without dead ends: 225 [2021-08-25 23:18:02,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-08-25 23:18:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2021-08-25 23:18:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.4594594594594594) internal successors, (324), 222 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 23:18:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 324 transitions. [2021-08-25 23:18:02,136 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 324 transitions. Word has length 37 [2021-08-25 23:18:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:02,137 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 324 transitions. [2021-08-25 23:18:02,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 23:18:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 324 transitions. [2021-08-25 23:18:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-25 23:18:02,137 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:02,137 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:18:02,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-25 23:18:02,137 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash -140510671, now seen corresponding path program 1 times [2021-08-25 23:18:02,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:02,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053762951] [2021-08-25 23:18:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:02,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-25 23:18:02,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:02,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053762951] [2021-08-25 23:18:02,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053762951] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 23:18:02,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 23:18:02,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 23:18:02,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711898449] [2021-08-25 23:18:02,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 23:18:02,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:02,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 23:18:02,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:02,168 INFO L87 Difference]: Start difference. First operand 223 states and 324 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 23:18:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:02,186 INFO L93 Difference]: Finished difference Result 305 states and 442 transitions. [2021-08-25 23:18:02,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 23:18:02,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-25 23:18:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:02,187 INFO L225 Difference]: With dead ends: 305 [2021-08-25 23:18:02,187 INFO L226 Difference]: Without dead ends: 143 [2021-08-25 23:18:02,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 23:18:02,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-25 23:18:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2021-08-25 23:18:02,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4214285714285715) internal successors, (199), 140 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 23:18:02,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 199 transitions. [2021-08-25 23:18:02,190 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 199 transitions. Word has length 46 [2021-08-25 23:18:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:02,190 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 199 transitions. [2021-08-25 23:18:02,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 23:18:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 199 transitions. [2021-08-25 23:18:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-25 23:18:02,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:02,191 INFO L512 BasicCegarLoop]: trace histogram [5, 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] [2021-08-25 23:18:02,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-25 23:18:02,191 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:02,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:02,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1014660280, now seen corresponding path program 1 times [2021-08-25 23:18:02,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:02,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791572843] [2021-08-25 23:18:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:02,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-25 23:18:02,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:02,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791572843] [2021-08-25 23:18:02,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791572843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:02,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813050016] [2021-08-25 23:18:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:02,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 23:18:02,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 23:18:02,256 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 23:18:02,293 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 23:18:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:02,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-25 23:18:02,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 23:18:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:02,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813050016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:02,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 23:18:02,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-25 23:18:02,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683348378] [2021-08-25 23:18:02,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 23:18:02,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:02,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 23:18:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-25 23:18:02,631 INFO L87 Difference]: Start difference. First operand 141 states and 199 transitions. Second operand has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 23:18:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:02,695 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2021-08-25 23:18:02,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 23:18:02,696 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 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 47 [2021-08-25 23:18:02,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:02,696 INFO L225 Difference]: With dead ends: 167 [2021-08-25 23:18:02,697 INFO L226 Difference]: Without dead ends: 160 [2021-08-25 23:18:02,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-25 23:18:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-25 23:18:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2021-08-25 23:18:02,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.4012738853503184) internal successors, (220), 157 states have internal predecessors, (220), 0 states have call successors, (0), 0 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 23:18:02,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 220 transitions. [2021-08-25 23:18:02,700 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 220 transitions. Word has length 47 [2021-08-25 23:18:02,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:02,701 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 220 transitions. [2021-08-25 23:18:02,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.2) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 23:18:02,701 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 220 transitions. [2021-08-25 23:18:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-25 23:18:02,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:02,701 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 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] [2021-08-25 23:18:02,720 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 23:18:02,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 23:18:02,913 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash 751253453, now seen corresponding path program 1 times [2021-08-25 23:18:02,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:02,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061752091] [2021-08-25 23:18:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:02,913 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:03,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:03,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061752091] [2021-08-25 23:18:03,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061752091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:03,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073943132] [2021-08-25 23:18:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:03,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 23:18:03,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 23:18:03,173 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 23:18:03,174 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 23:18:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-25 23:18:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 23:18:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:03,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073943132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:03,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 23:18:03,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-25 23:18:03,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190669598] [2021-08-25 23:18:03,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-25 23:18:03,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-25 23:18:03,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-25 23:18:03,681 INFO L87 Difference]: Start difference. First operand 158 states and 220 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 23:18:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:03,899 INFO L93 Difference]: Finished difference Result 252 states and 354 transitions. [2021-08-25 23:18:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-25 23:18:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 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 57 [2021-08-25 23:18:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:03,900 INFO L225 Difference]: With dead ends: 252 [2021-08-25 23:18:03,900 INFO L226 Difference]: Without dead ends: 250 [2021-08-25 23:18:03,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-25 23:18:03,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-25 23:18:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2021-08-25 23:18:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.4008097165991902) internal successors, (346), 247 states have internal predecessors, (346), 0 states have call successors, (0), 0 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 23:18:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 346 transitions. [2021-08-25 23:18:03,905 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 346 transitions. Word has length 57 [2021-08-25 23:18:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:03,905 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 346 transitions. [2021-08-25 23:18:03,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 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 23:18:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 346 transitions. [2021-08-25 23:18:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-08-25 23:18:03,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 23:18:03,906 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 7, 7, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 23:18:03,925 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 23:18:04,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 23:18:04,117 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 23:18:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 23:18:04,117 INFO L82 PathProgramCache]: Analyzing trace with hash 366250712, now seen corresponding path program 1 times [2021-08-25 23:18:04,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 23:18:04,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808088223] [2021-08-25 23:18:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:04,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 23:18:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:04,432 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 20 proven. 175 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-08-25 23:18:04,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 23:18:04,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808088223] [2021-08-25 23:18:04,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808088223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:04,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329910766] [2021-08-25 23:18:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 23:18:04,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 23:18:04,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 23:18:04,435 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 23:18:04,465 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 23:18:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 23:18:04,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 731 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-25 23:18:04,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 23:18:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 20 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 23:18:05,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329910766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 23:18:05,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 23:18:05,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 19 [2021-08-25 23:18:05,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830615050] [2021-08-25 23:18:05,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-25 23:18:05,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 23:18:05,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-25 23:18:05,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-25 23:18:05,412 INFO L87 Difference]: Start difference. First operand 248 states and 346 transitions. Second operand has 19 states, 19 states have (on average 8.473684210526315) internal successors, (161), 19 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 23:18:05,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 23:18:05,537 INFO L93 Difference]: Finished difference Result 266 states and 372 transitions. [2021-08-25 23:18:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-25 23:18:05,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.473684210526315) internal successors, (161), 19 states have internal predecessors, (161), 0 states have call successors, (0), 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 23:18:05,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 23:18:05,540 INFO L225 Difference]: With dead ends: 266 [2021-08-25 23:18:05,540 INFO L226 Difference]: Without dead ends: 0 [2021-08-25 23:18:05,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-25 23:18:05,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-25 23:18:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-25 23:18:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 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 23:18:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-25 23:18:05,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2021-08-25 23:18:05,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 23:18:05,542 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-25 23:18:05,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.473684210526315) internal successors, (161), 19 states have internal predecessors, (161), 0 states have call successors, (0), 0 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 23:18:05,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-25 23:18:05,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-25 23:18:05,544 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 23:18:05,566 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 23:18:05,763 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,SelfDestructingSolverStorable13 [2021-08-25 23:18:05,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-25 23:18:05,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 23:18:05,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 23:18:05,789 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 23:18:05,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-25 23:18:05,961 INFO L857 garLoopResultBuilder]: For program point L432(lines 432 434) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L300(lines 300 302) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L168(lines 168 170) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L532(lines 532 534) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L400(lines 400 402) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L268(lines 268 270) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L500(lines 500 502) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L368(lines 368 370) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L468(lines 468 470) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 60) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L42(lines 42 57) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L142(lines 142 157) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L242(lines 242 257) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L110(lines 110 125) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L44(lines 44 55) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L342(lines 342 357) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L210(lines 210 225) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L144(lines 144 155) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L78(lines 78 93) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L442(lines 442 457) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L310(lines 310 325) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L244(lines 244 255) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L178(lines 178 193) no Hoare annotation was computed. [2021-08-25 23:18:05,962 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 123) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L542(lines 542 557) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L410(lines 410 425) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L344(lines 344 355) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 293) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L212(lines 212 223) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L80(lines 80 91) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L510(lines 510 525) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L444(lines 444 455) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L378(lines 378 393) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L312(lines 312 323) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L180(lines 180 191) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L48(lines 48 50) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L544(lines 544 555) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L478(lines 478 493) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L412(lines 412 423) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L280(lines 280 291) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L148(lines 148 150) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L860 garLoopResultBuilder]: At program point L16(lines 16 568) the Hoare annotation is: true [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L512(lines 512 523) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L380(lines 380 391) no Hoare annotation was computed. [2021-08-25 23:18:05,963 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 250) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L116(lines 116 118) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L480(lines 480 491) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L348(lines 348 350) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L216(lines 216 218) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L84(lines 84 86) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L448(lines 448 450) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 318) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L184(lines 184 186) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L548(lines 548 550) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L416(lines 416 418) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L284(lines 284 286) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L853 garLoopResultBuilder]: At program point L549(lines 16 568) the Hoare annotation is: false [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L516(lines 516 518) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L384(lines 384 386) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point L484(lines 484 486) no Hoare annotation was computed. [2021-08-25 23:18:05,964 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L853 garLoopResultBuilder]: At program point L26-2(lines 26 563) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~this_buffer_empty~0 0))) (or (and (<= 0 (+ ULTIMATE.start_main_~P8~0 2147483648)) (<= 5 ULTIMATE.start_main_~q~0) .cse0 (<= ULTIMATE.start_main_~this_expect~0 (+ 2 (* 2 (div (+ (- 2) ULTIMATE.start_main_~this_expect~0) 2)))) (<= ULTIMATE.start_main_~P8~0 2147483647)) (and .cse0 (= ULTIMATE.start_main_~q~0 0) (= ULTIMATE.start_main_~this_expect~0 0)))) [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L26-3(lines 26 563) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L126(lines 126 141) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L226(lines 226 241) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 109) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L61(lines 61 160) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 341) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L194(lines 194 209) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L161(lines 161 260) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L128(lines 128 139) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L62(lines 62 77) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L426(lines 426 441) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L294(lines 294 309) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L261(lines 261 360) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 239) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 177) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L96(lines 96 107) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L853 garLoopResultBuilder]: At program point L559(lines 26 563) the Hoare annotation is: (let ((.cse2 (= ULTIMATE.start_main_~this_buffer_empty~0 1)) (.cse0 (<= ULTIMATE.start_main_~this_expect~0 (+ (* 2 (div (+ (- 1) ULTIMATE.start_main_~this_expect~0) 2)) 1))) (.cse1 (<= 0 (+ ULTIMATE.start_main_~P8~0 2147483648))) (.cse4 (<= ULTIMATE.start_main_~this_expect~0 (+ 2 (* 2 (div (+ (- 2) ULTIMATE.start_main_~this_expect~0) 2))))) (.cse3 (<= ULTIMATE.start_main_~P8~0 2147483647)) (.cse5 (= ULTIMATE.start_main_~this_buffer_empty~0 0))) (or (and .cse0 (= ULTIMATE.start_main_~q~0 4) .cse1 .cse2 .cse3) (and .cse1 .cse2 .cse4 .cse3 (= ULTIMATE.start_main_~q~0 1)) (and .cse0 .cse1 .cse5 .cse3 (= ULTIMATE.start_main_~q~0 3)) (and .cse1 (<= 5 ULTIMATE.start_main_~q~0) .cse5 .cse4 .cse3) (and .cse5 (= ULTIMATE.start_main_~q~0 0) (= ULTIMATE.start_main_~this_expect~0 0)))) [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L526(lines 526 541) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L394(lines 394 409) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L361(lines 361 460) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 339) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L262(lines 262 277) no Hoare annotation was computed. [2021-08-25 23:18:05,965 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 207) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 75) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L494(lines 494 509) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L461(lines 461 560) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L428(lines 428 439) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L362(lines 362 377) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 307) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L164(lines 164 175) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 567) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L528(lines 528 539) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L462(lines 462 477) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L396(lines 396 407) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L264(lines 264 275) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L132(lines 132 134) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L496(lines 496 507) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L364(lines 364 375) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L232(lines 232 234) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L100(lines 100 102) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L464(lines 464 475) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L332(lines 332 334) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L200(lines 200 202) no Hoare annotation was computed. [2021-08-25 23:18:05,966 INFO L857 garLoopResultBuilder]: For program point L68(lines 68 70) no Hoare annotation was computed. [2021-08-25 23:18:05,970 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 23:18:05,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 11:18:05 BoogieIcfgContainer [2021-08-25 23:18:05,979 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 23:18:05,980 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 23:18:05,980 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 23:18:05,980 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 23:18:05,980 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 11:17:59" (3/4) ... [2021-08-25 23:18:05,982 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-25 23:18:05,993 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-25 23:18:05,993 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-25 23:18:05,993 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 23:18:05,993 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-25 23:18:06,017 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 23:18:06,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 23:18:06,018 INFO L168 Benchmark]: Toolchain (without parser) took 7466.27 ms. Allocated memory was 54.5 MB in the beginning and 195.0 MB in the end (delta: 140.5 MB). Free memory was 31.4 MB in the beginning and 116.7 MB in the end (delta: -85.3 MB). Peak memory consumption was 54.1 MB. Max. memory is 16.1 GB. [2021-08-25 23:18:06,019 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory was 36.0 MB in the beginning and 36.0 MB in the end (delta: 37.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 23:18:06,019 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.59 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 31.2 MB in the beginning and 57.9 MB in the end (delta: -26.7 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2021-08-25 23:18:06,019 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.81 ms. Allocated memory is still 75.5 MB. Free memory was 57.9 MB in the beginning and 52.7 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-25 23:18:06,020 INFO L168 Benchmark]: Boogie Preprocessor took 41.91 ms. Allocated memory is still 75.5 MB. Free memory was 52.7 MB in the beginning and 49.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-25 23:18:06,020 INFO L168 Benchmark]: RCFGBuilder took 638.51 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 49.9 MB in the beginning and 64.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2021-08-25 23:18:06,020 INFO L168 Benchmark]: TraceAbstraction took 6393.51 ms. Allocated memory was 92.3 MB in the beginning and 195.0 MB in the end (delta: 102.8 MB). Free memory was 63.9 MB in the beginning and 118.8 MB in the end (delta: -54.9 MB). Peak memory consumption was 109.5 MB. Max. memory is 16.1 GB. [2021-08-25 23:18:06,020 INFO L168 Benchmark]: Witness Printer took 37.75 ms. Allocated memory is still 195.0 MB. Free memory was 118.8 MB in the beginning and 116.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 23:18:06,021 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory was 36.0 MB in the beginning and 36.0 MB in the end (delta: 37.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.59 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 31.2 MB in the beginning and 57.9 MB in the end (delta: -26.7 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.81 ms. Allocated memory is still 75.5 MB. Free memory was 57.9 MB in the beginning and 52.7 MB in the end (delta: 5.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.91 ms. Allocated memory is still 75.5 MB. Free memory was 52.7 MB in the beginning and 49.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 638.51 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 49.9 MB in the beginning and 64.3 MB in the end (delta: -14.4 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6393.51 ms. Allocated memory was 92.3 MB in the beginning and 195.0 MB in the end (delta: 102.8 MB). Free memory was 63.9 MB in the beginning and 118.8 MB in the end (delta: -54.9 MB). Peak memory consumption was 109.5 MB. Max. memory is 16.1 GB. * Witness Printer took 37.75 ms. Allocated memory is still 195.0 MB. Free memory was 118.8 MB in the beginning and 116.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 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 - PositiveResult [Line: 567]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 109 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6344.9ms, OverallIterations: 14, TraceHistogramMax: 11, EmptinessCheckTime: 21.4ms, AutomataDifference: 1142.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 197.3ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2194 SDtfs, 2169 SDslu, 4497 SDs, 0 SdLazy, 686 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 636.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 334 GetRequests, 267 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 448.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=295occurred in iteration=7, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 104.1ms AutomataMinimizationTime, 14 MinimizatonAttempts, 75 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 24 NumberOfFragments, 154 HoareAnnotationTreeSize, 4 FomulaSimplifications, 843 FormulaSimplificationTreeSizeReduction, 24.1ms HoareSimplificationTime, 4 FomulaSimplificationsInter, 414 FormulaSimplificationTreeSizeReductionInter, 167.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 118.4ms SsaConstructionTime, 580.5ms SatisfiabilityAnalysisTime, 2530.2ms InterpolantComputationTime, 736 NumberOfCodeBlocks, 736 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 717 ConstructedInterpolants, 0 QuantifiedInterpolants, 5648 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1920 ConjunctsInSsa, 109 ConjunctsInUnsatCore, 19 InterpolantComputations, 10 PerfectInterpolantSequences, 238/766 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((((this_expect <= 2 * ((-1 + this_expect) / 2) + 1 && q == 4) && 0 <= P8 + 2147483648) && this_buffer_empty == 1) && P8 <= 2147483647) || ((((0 <= P8 + 2147483648 && this_buffer_empty == 1) && this_expect <= 2 + 2 * ((-2 + this_expect) / 2)) && P8 <= 2147483647) && q == 1)) || ((((this_expect <= 2 * ((-1 + this_expect) / 2) + 1 && 0 <= P8 + 2147483648) && this_buffer_empty == 0) && P8 <= 2147483647) && q == 3)) || ((((0 <= P8 + 2147483648 && 5 <= q) && this_buffer_empty == 0) && this_expect <= 2 + 2 * ((-2 + this_expect) / 2)) && P8 <= 2147483647)) || ((this_buffer_empty == 0 && q == 0) && this_expect == 0) - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: ((((0 <= P8 + 2147483648 && 5 <= q) && this_buffer_empty == 0) && this_expect <= 2 + 2 * ((-2 + this_expect) / 2)) && P8 <= 2147483647) || ((this_buffer_empty == 0 && q == 0) && this_expect == 0) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2021-08-25 23:18:06,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...