./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gr2006.i --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/loop-lit/gr2006.i -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 e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:45:56,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:45:56,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:45:56,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:45:56,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:45:56,929 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:45:56,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:45:56,935 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:45:56,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:45:56,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:45:56,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:45:56,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:45:56,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:45:56,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:45:56,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:45:56,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:45:56,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:45:56,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:45:56,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:45:56,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:45:56,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:45:56,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:45:56,975 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:45:56,976 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:45:56,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:45:56,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:45:56,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:45:56,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:45:56,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:45:56,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:45:56,988 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:45:56,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:45:56,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:45:56,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:45:56,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:45:56,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:45:56,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:45:56,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:45:56,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:45:56,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:45:56,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:45:56,997 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:45:57,027 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:45:57,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:45:57,028 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:45:57,028 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:45:57,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:45:57,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:45:57,029 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:45:57,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:45:57,030 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:45:57,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:45:57,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:45:57,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:45:57,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:45:57,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:45:57,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:45:57,031 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:45:57,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:45:57,031 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:45:57,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:45:57,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:45:57,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:45:57,032 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:45:57,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:45:57,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:45:57,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:45:57,033 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:45:57,033 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:45:57,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:45:57,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:45:57,034 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:45:57,034 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 [2021-08-26 03:45:57,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:45:57,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:45:57,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:45:57,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:45:57,327 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:45:57,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gr2006.i [2021-08-26 03:45:57,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63892ccc/79547bfeb0cc487c985cd10e6d2d3898/FLAGe87f1d2c2 [2021-08-26 03:45:57,828 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:45:57,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gr2006.i [2021-08-26 03:45:57,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63892ccc/79547bfeb0cc487c985cd10e6d2d3898/FLAGe87f1d2c2 [2021-08-26 03:45:58,241 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c63892ccc/79547bfeb0cc487c985cd10e6d2d3898 [2021-08-26 03:45:58,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:45:58,245 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:45:58,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:45:58,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:45:58,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:45:58,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8cf90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58, skipping insertion in model container [2021-08-26 03:45:58,265 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:45:58,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:45:58,408 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/loop-lit/gr2006.i[895,908] [2021-08-26 03:45:58,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:45:58,426 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:45:58,436 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/loop-lit/gr2006.i[895,908] [2021-08-26 03:45:58,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:45:58,450 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:45:58,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58 WrapperNode [2021-08-26 03:45:58,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:45:58,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:45:58,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:45:58,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:45:58,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,502 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:45:58,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:45:58,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:45:58,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:45:58,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,518 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:45:58,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:45:58,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:45:58,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:45:58,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (1/1) ... [2021-08-26 03:45:58,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:45:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:58,562 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) [2021-08-26 03:45:58,589 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 [2021-08-26 03:45:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:45:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:45:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:45:58,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:45:58,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:45:58,816 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:45:58,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:45:58 BoogieIcfgContainer [2021-08-26 03:45:58,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:45:58,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:45:58,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:45:58,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:45:58,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:45:58" (1/3) ... [2021-08-26 03:45:58,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73bfff9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:45:58, skipping insertion in model container [2021-08-26 03:45:58,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:45:58" (2/3) ... [2021-08-26 03:45:58,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73bfff9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:45:58, skipping insertion in model container [2021-08-26 03:45:58,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:45:58" (3/3) ... [2021-08-26 03:45:58,827 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2021-08-26 03:45:58,832 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:45:58,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:45:58,884 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:45:58,891 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 [2021-08-26 03:45:58,891 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:45:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:45:58,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:58,909 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:45:58,910 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:58,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:58,915 INFO L82 PathProgramCache]: Analyzing trace with hash 890091623, now seen corresponding path program 1 times [2021-08-26 03:45:58,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:58,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644998435] [2021-08-26 03:45:58,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:58,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:59,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:59,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644998435] [2021-08-26 03:45:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644998435] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:45:59,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:45:59,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 03:45:59,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402053737] [2021-08-26 03:45:59,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 03:45:59,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:59,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 03:45:59,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:45:59,042 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:59,053 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-08-26 03:45:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 03:45:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 03:45:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:59,059 INFO L225 Difference]: With dead ends: 21 [2021-08-26 03:45:59,059 INFO L226 Difference]: Without dead ends: 9 [2021-08-26 03:45:59,061 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 [2021-08-26 03:45:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-26 03:45:59,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-26 03:45:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2021-08-26 03:45:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-26 03:45:59,083 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-08-26 03:45:59,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:59,083 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-26 03:45:59,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-08-26 03:45:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 03:45:59,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:59,084 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:59,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:45:59,085 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:59,086 INFO L82 PathProgramCache]: Analyzing trace with hash 297871632, now seen corresponding path program 1 times [2021-08-26 03:45:59,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:59,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631696366] [2021-08-26 03:45:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:59,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:59,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:59,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631696366] [2021-08-26 03:45:59,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631696366] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:45:59,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:45:59,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:45:59,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704896616] [2021-08-26 03:45:59,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:45:59,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:45:59,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:45:59,161 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:59,190 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-08-26 03:45:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:45:59,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-08-26 03:45:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:59,192 INFO L225 Difference]: With dead ends: 23 [2021-08-26 03:45:59,192 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 03:45:59,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:45:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 03:45:59,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-08-26 03:45:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-08-26 03:45:59,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-08-26 03:45:59,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:59,199 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-26 03:45:59,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-08-26 03:45:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 03:45:59,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:59,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:59,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:45:59,201 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash 296024590, now seen corresponding path program 1 times [2021-08-26 03:45:59,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:59,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563899866] [2021-08-26 03:45:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:59,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:59,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:59,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563899866] [2021-08-26 03:45:59,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563899866] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:45:59,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:45:59,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 03:45:59,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685918126] [2021-08-26 03:45:59,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:45:59,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:45:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:45:59,266 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:59,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:59,288 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-08-26 03:45:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:45:59,289 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-08-26 03:45:59,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:59,289 INFO L225 Difference]: With dead ends: 18 [2021-08-26 03:45:59,290 INFO L226 Difference]: Without dead ends: 14 [2021-08-26 03:45:59,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:45:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-26 03:45:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-26 03:45:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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) [2021-08-26 03:45:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-26 03:45:59,295 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2021-08-26 03:45:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:59,295 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-26 03:45:59,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-26 03:45:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 03:45:59,296 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:59,297 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:59,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 03:45:59,297 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:59,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:59,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1661002755, now seen corresponding path program 1 times [2021-08-26 03:45:59,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:59,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988639592] [2021-08-26 03:45:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:59,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:59,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:59,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988639592] [2021-08-26 03:45:59,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988639592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:59,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854526522] [2021-08-26 03:45:59,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:59,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:59,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:59,349 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) [2021-08-26 03:45:59,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:45:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:59,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 03:45:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:45:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:59,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854526522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:59,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:45:59,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 03:45:59,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065535851] [2021-08-26 03:45:59,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:45:59,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:45:59,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:45:59,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:45:59,521 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-08-26 03:45:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:45:59,555 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-08-26 03:45:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:45:59,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 11 [2021-08-26 03:45:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:45:59,557 INFO L225 Difference]: With dead ends: 25 [2021-08-26 03:45:59,557 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 03:45:59,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:45:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 03:45:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-08-26 03:45:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:45:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-26 03:45:59,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-08-26 03:45:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:45:59,564 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-26 03:45:59,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-08-26 03:45:59,569 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-26 03:45:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 03:45:59,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:45:59,570 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:45:59,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 03:45:59,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:59,789 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:45:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:45:59,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1527752176, now seen corresponding path program 2 times [2021-08-26 03:45:59,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:45:59,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707949773] [2021-08-26 03:45:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:45:59,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:45:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:45:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:45:59,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:45:59,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707949773] [2021-08-26 03:45:59,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707949773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:45:59,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001071918] [2021-08-26 03:45:59,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:45:59,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:45:59,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:45:59,855 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) [2021-08-26 03:45:59,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:45:59,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:45:59,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:45:59,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 03:45:59,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 03:46:00,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001071918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:00,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:00,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-26 03:46:00,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137985539] [2021-08-26 03:46:00,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 03:46:00,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 03:46:00,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:46:00,040 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-08-26 03:46:00,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:00,155 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-08-26 03:46:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 03:46:00,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 14 [2021-08-26 03:46:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:00,156 INFO L225 Difference]: With dead ends: 35 [2021-08-26 03:46:00,157 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 03:46:00,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:46:00,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 03:46:00,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-08-26 03:46:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-08-26 03:46:00,161 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-08-26 03:46:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:00,161 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-08-26 03:46:00,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-08-26 03:46:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-08-26 03:46:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 03:46:00,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:00,162 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:00,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:00,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:00,373 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:00,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:00,374 INFO L82 PathProgramCache]: Analyzing trace with hash -54480515, now seen corresponding path program 3 times [2021-08-26 03:46:00,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:00,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647703567] [2021-08-26 03:46:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:00,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-26 03:46:00,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:00,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647703567] [2021-08-26 03:46:00,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647703567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:00,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856135575] [2021-08-26 03:46:00,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:46:00,456 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:00,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:00,457 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) [2021-08-26 03:46:00,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:46:00,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-26 03:46:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:00,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 03:46:00,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 03:46:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856135575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:00,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:00,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-26 03:46:00,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94586867] [2021-08-26 03:46:00,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 03:46:00,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:00,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 03:46:00,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-26 03:46:00,650 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:00,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:00,749 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2021-08-26 03:46:00,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 03:46:00,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 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 [2021-08-26 03:46:00,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:00,750 INFO L225 Difference]: With dead ends: 52 [2021-08-26 03:46:00,751 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 03:46:00,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-26 03:46:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 03:46:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2021-08-26 03:46:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 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) [2021-08-26 03:46:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-08-26 03:46:00,756 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2021-08-26 03:46:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:00,756 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-08-26 03:46:00,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:00,757 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-08-26 03:46:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 03:46:00,757 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:00,758 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:00,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:00,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:00,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -125277221, now seen corresponding path program 4 times [2021-08-26 03:46:00,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:00,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916216218] [2021-08-26 03:46:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:00,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 03:46:01,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:01,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916216218] [2021-08-26 03:46:01,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916216218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:01,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677959167] [2021-08-26 03:46:01,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:46:01,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:01,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:01,052 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) [2021-08-26 03:46:01,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:46:01,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:46:01,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:01,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 03:46:01,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 46 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 03:46:01,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677959167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:01,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:01,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-08-26 03:46:01,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823989323] [2021-08-26 03:46:01,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 03:46:01,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 03:46:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:46:01,240 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:01,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:01,271 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-08-26 03:46:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:46:01,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-26 03:46:01,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:01,273 INFO L225 Difference]: With dead ends: 51 [2021-08-26 03:46:01,273 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 03:46:01,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 03:46:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 03:46:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-08-26 03:46:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-08-26 03:46:01,281 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 29 [2021-08-26 03:46:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:01,282 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-08-26 03:46:01,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-08-26 03:46:01,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 03:46:01,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:01,283 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 5, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:01,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-26 03:46:01,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:01,484 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:01,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1180467442, now seen corresponding path program 5 times [2021-08-26 03:46:01,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:01,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123447564] [2021-08-26 03:46:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:01,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 03:46:01,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:01,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123447564] [2021-08-26 03:46:01,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123447564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:01,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476859679] [2021-08-26 03:46:01,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:46:01,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:01,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:01,597 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) [2021-08-26 03:46:01,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:46:01,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-26 03:46:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:46:01,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 56 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 03:46:01,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476859679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:01,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:01,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-26 03:46:01,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677922655] [2021-08-26 03:46:01,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 03:46:01,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:01,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 03:46:01,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:46:01,810 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-08-26 03:46:01,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:01,841 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-08-26 03:46:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 03:46:01,842 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 32 [2021-08-26 03:46:01,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:01,844 INFO L225 Difference]: With dead ends: 54 [2021-08-26 03:46:01,844 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 03:46:01,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 03:46:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 03:46:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-08-26 03:46:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-08-26 03:46:01,851 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 32 [2021-08-26 03:46:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:01,851 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-08-26 03:46:01,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2021-08-26 03:46:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-08-26 03:46:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 03:46:01,852 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:01,852 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:01,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:02,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:02,069 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:02,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:02,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1486701829, now seen corresponding path program 6 times [2021-08-26 03:46:02,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:02,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844024102] [2021-08-26 03:46:02,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:02,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:02,156 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 03:46:02,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:02,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844024102] [2021-08-26 03:46:02,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844024102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:02,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68074413] [2021-08-26 03:46:02,157 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:46:02,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:02,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:02,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:02,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:46:02,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-26 03:46:02,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:02,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 03:46:02,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 89 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-26 03:46:02,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68074413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:02,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:02,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-26 03:46:02,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886229762] [2021-08-26 03:46:02,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 03:46:02,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:02,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 03:46:02,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:46:02,424 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:02,553 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-08-26 03:46:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 03:46:02,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 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 35 [2021-08-26 03:46:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:02,554 INFO L225 Difference]: With dead ends: 70 [2021-08-26 03:46:02,554 INFO L226 Difference]: Without dead ends: 53 [2021-08-26 03:46:02,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-08-26 03:46:02,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-26 03:46:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2021-08-26 03:46:02,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-08-26 03:46:02,559 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 35 [2021-08-26 03:46:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:02,560 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-08-26 03:46:02,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:02,560 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-08-26 03:46:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-26 03:46:02,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:02,561 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 7, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:02,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:02,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:02,777 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:02,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1793004003, now seen corresponding path program 7 times [2021-08-26 03:46:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:02,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041483998] [2021-08-26 03:46:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:02,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:02,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:02,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041483998] [2021-08-26 03:46:02,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041483998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:02,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471712080] [2021-08-26 03:46:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:46:02,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:02,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:02,871 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:02,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 03:46:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:02,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 03:46:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 99 proven. 77 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:03,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471712080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:03,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:03,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-26 03:46:03,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634757711] [2021-08-26 03:46:03,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 03:46:03,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:03,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 03:46:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:46:03,121 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:03,156 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-08-26 03:46:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 03:46:03,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 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 41 [2021-08-26 03:46:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:03,157 INFO L225 Difference]: With dead ends: 66 [2021-08-26 03:46:03,157 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 03:46:03,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:46:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 03:46:03,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-08-26 03:46:03,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-08-26 03:46:03,161 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 41 [2021-08-26 03:46:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:03,162 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-08-26 03:46:03,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-08-26 03:46:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 03:46:03,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:03,163 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:03,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:03,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:03,373 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1018049328, now seen corresponding path program 8 times [2021-08-26 03:46:03,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:03,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874533168] [2021-08-26 03:46:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:03,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:03,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:03,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874533168] [2021-08-26 03:46:03,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874533168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:03,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670481811] [2021-08-26 03:46:03,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:46:03,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:03,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:03,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:03,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 03:46:03,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:46:03,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:03,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 03:46:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:03,783 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:03,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670481811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:03,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:03,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-26 03:46:03,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730274909] [2021-08-26 03:46:03,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 03:46:03,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 03:46:03,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:46:03,785 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-08-26 03:46:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:03,813 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-08-26 03:46:03,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 03:46:03,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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 44 [2021-08-26 03:46:03,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:03,814 INFO L225 Difference]: With dead ends: 69 [2021-08-26 03:46:03,814 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 03:46:03,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:46:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 03:46:03,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-08-26 03:46:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-08-26 03:46:03,818 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2021-08-26 03:46:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:03,819 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-08-26 03:46:03,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2021-08-26 03:46:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-08-26 03:46:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 03:46:03,820 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:03,820 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:03,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:04,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-26 03:46:04,025 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:04,025 INFO L82 PathProgramCache]: Analyzing trace with hash 207457597, now seen corresponding path program 9 times [2021-08-26 03:46:04,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:04,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160329686] [2021-08-26 03:46:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:04,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 125 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:04,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:04,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160329686] [2021-08-26 03:46:04,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160329686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:04,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436034398] [2021-08-26 03:46:04,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:46:04,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:04,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:04,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:04,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 03:46:04,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-08-26 03:46:04,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:04,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 03:46:04,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 13 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:46:04,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436034398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:04,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:04,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 17 [2021-08-26 03:46:04,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37693428] [2021-08-26 03:46:04,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 03:46:04,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:04,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 03:46:04,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-26 03:46:04,479 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:04,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:04,524 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-08-26 03:46:04,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 03:46:04,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 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 [2021-08-26 03:46:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:04,525 INFO L225 Difference]: With dead ends: 84 [2021-08-26 03:46:04,525 INFO L226 Difference]: Without dead ends: 64 [2021-08-26 03:46:04,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-26 03:46:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-26 03:46:04,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-08-26 03:46:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.096774193548387) internal successors, (68), 62 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-08-26 03:46:04,546 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 47 [2021-08-26 03:46:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:04,547 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-08-26 03:46:04,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-08-26 03:46:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-26 03:46:04,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:04,549 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 14, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:04,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:04,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:04,772 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:04,773 INFO L82 PathProgramCache]: Analyzing trace with hash 32308080, now seen corresponding path program 10 times [2021-08-26 03:46:04,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:04,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409583670] [2021-08-26 03:46:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:04,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:04,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:04,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409583670] [2021-08-26 03:46:04,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409583670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:04,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341141742] [2021-08-26 03:46:04,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:46:04,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:04,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:04,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:05,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 03:46:05,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:46:05,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:05,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 03:46:05,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 190 proven. 301 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:05,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341141742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:05,371 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:05,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-26 03:46:05,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650677010] [2021-08-26 03:46:05,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 03:46:05,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 03:46:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:46:05,374 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:05,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:05,420 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2021-08-26 03:46:05,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 03:46:05,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 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 62 [2021-08-26 03:46:05,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:05,421 INFO L225 Difference]: With dead ends: 87 [2021-08-26 03:46:05,421 INFO L226 Difference]: Without dead ends: 67 [2021-08-26 03:46:05,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-26 03:46:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-26 03:46:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-08-26 03:46:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 65 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-08-26 03:46:05,426 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 62 [2021-08-26 03:46:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:05,426 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-08-26 03:46:05,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:05,427 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-08-26 03:46:05,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-26 03:46:05,427 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:05,427 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 15, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:05,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-08-26 03:46:05,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 03:46:05,644 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1726719331, now seen corresponding path program 11 times [2021-08-26 03:46:05,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:05,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530983166] [2021-08-26 03:46:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:05,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:05,840 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 203 proven. 345 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:05,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:05,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530983166] [2021-08-26 03:46:05,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530983166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:05,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608898551] [2021-08-26 03:46:05,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:46:05,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:05,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:05,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:05,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 03:46:06,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-26 03:46:06,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:06,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 03:46:06,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 203 proven. 345 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:06,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608898551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:06,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:06,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-26 03:46:06,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72323575] [2021-08-26 03:46:06,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 03:46:06,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:06,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 03:46:06,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-26 03:46:06,253 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:06,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:06,310 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2021-08-26 03:46:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 03:46:06,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 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 65 [2021-08-26 03:46:06,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:06,312 INFO L225 Difference]: With dead ends: 90 [2021-08-26 03:46:06,312 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 03:46:06,312 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-26 03:46:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 03:46:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-08-26 03:46:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.088235294117647) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-08-26 03:46:06,319 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 65 [2021-08-26 03:46:06,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:06,319 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-08-26 03:46:06,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:06,320 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-08-26 03:46:06,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-26 03:46:06,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:06,320 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 16, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:06,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:06,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 03:46:06,537 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:06,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:06,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2016341936, now seen corresponding path program 12 times [2021-08-26 03:46:06,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:06,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751090629] [2021-08-26 03:46:06,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:06,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 216 proven. 392 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-26 03:46:06,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:06,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751090629] [2021-08-26 03:46:06,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751090629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:06,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39646147] [2021-08-26 03:46:06,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:46:06,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:06,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:06,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:06,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 03:46:06,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-08-26 03:46:06,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 03:46:06,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 560 proven. 57 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-26 03:46:07,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39646147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:07,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:07,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-08-26 03:46:07,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391332318] [2021-08-26 03:46:07,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-26 03:46:07,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:07,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-26 03:46:07,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 03:46:07,523 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:08,049 INFO L93 Difference]: Finished difference Result 285 states and 368 transitions. [2021-08-26 03:46:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 03:46:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 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 68 [2021-08-26 03:46:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:08,051 INFO L225 Difference]: With dead ends: 285 [2021-08-26 03:46:08,051 INFO L226 Difference]: Without dead ends: 265 [2021-08-26 03:46:08,053 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 723.8ms TimeCoverageRelationStatistics Valid=1049, Invalid=3643, Unknown=0, NotChecked=0, Total=4692 [2021-08-26 03:46:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-26 03:46:08,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 108. [2021-08-26 03:46:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.1682242990654206) internal successors, (125), 107 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2021-08-26 03:46:08,060 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 68 [2021-08-26 03:46:08,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:08,061 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2021-08-26 03:46:08,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.1944444444444446) internal successors, (115), 36 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:08,061 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2021-08-26 03:46:08,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-26 03:46:08,062 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:08,062 INFO L512 BasicCegarLoop]: trace histogram [34, 33, 17, 17, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:08,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:08,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-26 03:46:08,276 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:08,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:08,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1230960643, now seen corresponding path program 13 times [2021-08-26 03:46:08,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:08,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705431624] [2021-08-26 03:46:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:08,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 865 proven. 442 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-26 03:46:08,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:08,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705431624] [2021-08-26 03:46:08,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705431624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:08,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327476121] [2021-08-26 03:46:08,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:46:08,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:08,501 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:08,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 03:46:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:08,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 03:46:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 865 proven. 442 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-26 03:46:09,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327476121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:09,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:09,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-26 03:46:09,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801097791] [2021-08-26 03:46:09,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 03:46:09,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 03:46:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:46:09,075 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:09,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:09,148 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2021-08-26 03:46:09,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 03:46:09,148 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-08-26 03:46:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:09,150 INFO L225 Difference]: With dead ends: 168 [2021-08-26 03:46:09,150 INFO L226 Difference]: Without dead ends: 112 [2021-08-26 03:46:09,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-26 03:46:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-26 03:46:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-08-26 03:46:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 110 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:09,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2021-08-26 03:46:09,157 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 107 [2021-08-26 03:46:09,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:09,158 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2021-08-26 03:46:09,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2021-08-26 03:46:09,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-26 03:46:09,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:09,160 INFO L512 BasicCegarLoop]: trace histogram [35, 34, 18, 17, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:09,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:09,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 03:46:09,384 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash 174845424, now seen corresponding path program 14 times [2021-08-26 03:46:09,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:09,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147829110] [2021-08-26 03:46:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:09,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 914 proven. 495 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-26 03:46:09,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:09,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147829110] [2021-08-26 03:46:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147829110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:09,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004502305] [2021-08-26 03:46:09,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:46:09,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:09,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:09,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:09,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 03:46:09,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:46:09,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 03:46:09,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 914 proven. 495 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-26 03:46:10,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004502305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:10,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:10,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-26 03:46:10,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526210111] [2021-08-26 03:46:10,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 03:46:10,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:10,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 03:46:10,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-26 03:46:10,211 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:10,281 INFO L93 Difference]: Finished difference Result 171 states and 206 transitions. [2021-08-26 03:46:10,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 03:46:10,281 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 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 110 [2021-08-26 03:46:10,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:10,282 INFO L225 Difference]: With dead ends: 171 [2021-08-26 03:46:10,282 INFO L226 Difference]: Without dead ends: 115 [2021-08-26 03:46:10,283 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-26 03:46:10,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-26 03:46:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-08-26 03:46:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.1592920353982301) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:10,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-08-26 03:46:10,292 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 110 [2021-08-26 03:46:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:10,292 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-08-26 03:46:10,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-08-26 03:46:10,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-08-26 03:46:10,293 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:10,294 INFO L512 BasicCegarLoop]: trace histogram [36, 35, 19, 17, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:10,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:10,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:10,507 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash 317284125, now seen corresponding path program 15 times [2021-08-26 03:46:10,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:10,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883791125] [2021-08-26 03:46:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:10,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 963 proven. 551 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-26 03:46:10,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:10,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883791125] [2021-08-26 03:46:10,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883791125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:10,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844049503] [2021-08-26 03:46:10,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:46:10,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:10,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:10,773 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:10,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 03:46:11,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-08-26 03:46:11,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:11,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 03:46:11,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1040 proven. 801 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-26 03:46:11,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844049503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:11,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:11,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-08-26 03:46:11,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219161237] [2021-08-26 03:46:11,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 03:46:11,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:11,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 03:46:11,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:46:11,788 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:12,398 INFO L93 Difference]: Finished difference Result 330 states and 419 transitions. [2021-08-26 03:46:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-26 03:46:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 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 113 [2021-08-26 03:46:12,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:12,399 INFO L225 Difference]: With dead ends: 330 [2021-08-26 03:46:12,400 INFO L226 Difference]: Without dead ends: 274 [2021-08-26 03:46:12,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 905.9ms TimeCoverageRelationStatistics Valid=1415, Invalid=5065, Unknown=0, NotChecked=0, Total=6480 [2021-08-26 03:46:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-08-26 03:46:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 126. [2021-08-26 03:46:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.168) internal successors, (146), 125 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:12,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-08-26 03:46:12,409 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 113 [2021-08-26 03:46:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:12,410 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-08-26 03:46:12,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4523809523809526) internal successors, (145), 42 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:12,410 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-08-26 03:46:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-08-26 03:46:12,411 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:12,411 INFO L512 BasicCegarLoop]: trace histogram [40, 39, 20, 20, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:12,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:12,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 03:46:12,633 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash -934304805, now seen corresponding path program 16 times [2021-08-26 03:46:12,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:12,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22289583] [2021-08-26 03:46:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:12,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1198 proven. 610 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-08-26 03:46:12,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:12,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22289583] [2021-08-26 03:46:12,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22289583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:12,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173850101] [2021-08-26 03:46:12,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:46:12,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:12,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:12,935 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:12,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 03:46:13,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:46:13,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:13,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 03:46:13,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1198 proven. 610 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-08-26 03:46:13,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173850101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:13,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:13,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-08-26 03:46:13,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005092802] [2021-08-26 03:46:13,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 03:46:13,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:13,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 03:46:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:46:13,691 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:13,764 INFO L93 Difference]: Finished difference Result 195 states and 236 transitions. [2021-08-26 03:46:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 03:46:13,764 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-08-26 03:46:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:13,765 INFO L225 Difference]: With dead ends: 195 [2021-08-26 03:46:13,765 INFO L226 Difference]: Without dead ends: 130 [2021-08-26 03:46:13,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:46:13,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-26 03:46:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-08-26 03:46:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.1640625) internal successors, (149), 128 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 149 transitions. [2021-08-26 03:46:13,773 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 149 transitions. Word has length 125 [2021-08-26 03:46:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:13,773 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 149 transitions. [2021-08-26 03:46:13,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.125) internal successors, (75), 24 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 149 transitions. [2021-08-26 03:46:13,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-08-26 03:46:13,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:13,775 INFO L512 BasicCegarLoop]: trace histogram [41, 40, 21, 20, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:13,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:13,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:13,988 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:13,989 INFO L82 PathProgramCache]: Analyzing trace with hash 533074702, now seen corresponding path program 17 times [2021-08-26 03:46:13,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:13,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997561663] [2021-08-26 03:46:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:13,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1256 proven. 672 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-08-26 03:46:14,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:14,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997561663] [2021-08-26 03:46:14,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997561663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:14,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394567520] [2021-08-26 03:46:14,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:46:14,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:14,339 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:14,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 03:46:14,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-08-26 03:46:14,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 03:46:14,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1256 proven. 672 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-08-26 03:46:15,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394567520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:15,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:15,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-08-26 03:46:15,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030048733] [2021-08-26 03:46:15,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 03:46:15,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 03:46:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-08-26 03:46:15,135 INFO L87 Difference]: Start difference. First operand 129 states and 149 transitions. Second operand has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:15,207 INFO L93 Difference]: Finished difference Result 198 states and 239 transitions. [2021-08-26 03:46:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 03:46:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-08-26 03:46:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:15,209 INFO L225 Difference]: With dead ends: 198 [2021-08-26 03:46:15,209 INFO L226 Difference]: Without dead ends: 133 [2021-08-26 03:46:15,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-08-26 03:46:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-26 03:46:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-08-26 03:46:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 131 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2021-08-26 03:46:15,215 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 128 [2021-08-26 03:46:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:15,215 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2021-08-26 03:46:15,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.12) internal successors, (78), 25 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2021-08-26 03:46:15,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-08-26 03:46:15,217 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:15,217 INFO L512 BasicCegarLoop]: trace histogram [42, 41, 22, 20, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:15,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:15,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:15,431 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1058829051, now seen corresponding path program 18 times [2021-08-26 03:46:15,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:15,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557689231] [2021-08-26 03:46:15,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:15,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:15,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1314 proven. 737 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-08-26 03:46:15,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:15,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557689231] [2021-08-26 03:46:15,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557689231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:15,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926035147] [2021-08-26 03:46:15,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:46:15,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:15,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:15,749 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:15,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 03:46:16,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2021-08-26 03:46:16,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:16,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 03:46:16,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1403 proven. 1122 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-08-26 03:46:17,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926035147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:17,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:17,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-08-26 03:46:17,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226278509] [2021-08-26 03:46:17,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-26 03:46:17,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:17,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-26 03:46:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:46:17,135 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:17,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:17,791 INFO L93 Difference]: Finished difference Result 384 states and 488 transitions. [2021-08-26 03:46:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-26 03:46:17,792 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 0 states have call successors, (0), 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 131 [2021-08-26 03:46:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:17,793 INFO L225 Difference]: With dead ends: 384 [2021-08-26 03:46:17,794 INFO L226 Difference]: Without dead ends: 319 [2021-08-26 03:46:17,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1101.9ms TimeCoverageRelationStatistics Valid=1835, Invalid=6721, Unknown=0, NotChecked=0, Total=8556 [2021-08-26 03:46:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-08-26 03:46:17,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 144. [2021-08-26 03:46:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.167832167832168) internal successors, (167), 143 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2021-08-26 03:46:17,804 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 131 [2021-08-26 03:46:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:17,804 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2021-08-26 03:46:17,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4583333333333335) internal successors, (166), 48 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2021-08-26 03:46:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-08-26 03:46:17,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:17,805 INFO L512 BasicCegarLoop]: trace histogram [46, 45, 23, 23, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:17,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:18,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:18,029 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:18,029 INFO L82 PathProgramCache]: Analyzing trace with hash 901437565, now seen corresponding path program 19 times [2021-08-26 03:46:18,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:18,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928626979] [2021-08-26 03:46:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:18,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1585 proven. 805 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-08-26 03:46:18,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:18,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928626979] [2021-08-26 03:46:18,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928626979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:18,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696783978] [2021-08-26 03:46:18,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:46:18,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:18,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:18,377 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:18,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 03:46:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:18,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 03:46:18,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1585 proven. 805 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-08-26 03:46:19,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696783978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:19,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:19,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-08-26 03:46:19,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879473223] [2021-08-26 03:46:19,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 03:46:19,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 03:46:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-26 03:46:19,275 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:19,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:19,336 INFO L93 Difference]: Finished difference Result 222 states and 269 transitions. [2021-08-26 03:46:19,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 03:46:19,336 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 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 143 [2021-08-26 03:46:19,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:19,337 INFO L225 Difference]: With dead ends: 222 [2021-08-26 03:46:19,337 INFO L226 Difference]: Without dead ends: 148 [2021-08-26 03:46:19,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-26 03:46:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-08-26 03:46:19,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-08-26 03:46:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.1643835616438356) internal successors, (170), 146 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 170 transitions. [2021-08-26 03:46:19,344 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 170 transitions. Word has length 143 [2021-08-26 03:46:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:19,345 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 170 transitions. [2021-08-26 03:46:19,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.111111111111111) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 170 transitions. [2021-08-26 03:46:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-08-26 03:46:19,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:19,346 INFO L512 BasicCegarLoop]: trace histogram [47, 46, 24, 23, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:19,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:19,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:19,549 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:19,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1257963280, now seen corresponding path program 20 times [2021-08-26 03:46:19,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:19,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779092668] [2021-08-26 03:46:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:19,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1652 proven. 876 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-08-26 03:46:19,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:19,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779092668] [2021-08-26 03:46:19,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779092668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:19,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192287311] [2021-08-26 03:46:19,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:46:19,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:19,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:19,900 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:19,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 03:46:20,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:46:20,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:20,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 03:46:20,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1652 proven. 876 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-08-26 03:46:20,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192287311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:20,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:20,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-08-26 03:46:20,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532671822] [2021-08-26 03:46:20,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 03:46:20,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 03:46:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-08-26 03:46:20,775 INFO L87 Difference]: Start difference. First operand 147 states and 170 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:20,849 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2021-08-26 03:46:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 03:46:20,849 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 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 146 [2021-08-26 03:46:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:20,850 INFO L225 Difference]: With dead ends: 225 [2021-08-26 03:46:20,850 INFO L226 Difference]: Without dead ends: 151 [2021-08-26 03:46:20,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-08-26 03:46:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-08-26 03:46:20,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-08-26 03:46:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1610738255033557) internal successors, (173), 149 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:20,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 173 transitions. [2021-08-26 03:46:20,864 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 173 transitions. Word has length 146 [2021-08-26 03:46:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:20,864 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 173 transitions. [2021-08-26 03:46:20,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 173 transitions. [2021-08-26 03:46:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-08-26 03:46:20,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:20,865 INFO L512 BasicCegarLoop]: trace histogram [48, 47, 25, 23, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:20,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:21,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-26 03:46:21,084 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1948377187, now seen corresponding path program 21 times [2021-08-26 03:46:21,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:21,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31107085] [2021-08-26 03:46:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:21,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1719 proven. 950 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-08-26 03:46:21,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:21,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31107085] [2021-08-26 03:46:21,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31107085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:21,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344762643] [2021-08-26 03:46:21,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:46:21,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:21,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:21,453 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:21,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 03:46:22,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-08-26 03:46:22,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-26 03:46:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1820 proven. 1497 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-08-26 03:46:23,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344762643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:23,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:23,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-08-26 03:46:23,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925873316] [2021-08-26 03:46:23,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-26 03:46:23,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-26 03:46:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 03:46:23,091 INFO L87 Difference]: Start difference. First operand 150 states and 173 transitions. Second operand has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:23,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:23,841 INFO L93 Difference]: Finished difference Result 438 states and 557 transitions. [2021-08-26 03:46:23,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-26 03:46:23,842 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 0 states have call successors, (0), 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 149 [2021-08-26 03:46:23,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:23,843 INFO L225 Difference]: With dead ends: 438 [2021-08-26 03:46:23,843 INFO L226 Difference]: Without dead ends: 364 [2021-08-26 03:46:23,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 1321.2ms TimeCoverageRelationStatistics Valid=2309, Invalid=8611, Unknown=0, NotChecked=0, Total=10920 [2021-08-26 03:46:23,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-08-26 03:46:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 162. [2021-08-26 03:46:23,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1677018633540373) internal successors, (188), 161 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2021-08-26 03:46:23,856 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 149 [2021-08-26 03:46:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:23,856 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2021-08-26 03:46:23,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.462962962962963) internal successors, (187), 54 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2021-08-26 03:46:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-08-26 03:46:23,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:23,857 INFO L512 BasicCegarLoop]: trace histogram [52, 51, 26, 26, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:23,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:24,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-26 03:46:24,058 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:24,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1177477339, now seen corresponding path program 22 times [2021-08-26 03:46:24,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:24,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241069708] [2021-08-26 03:46:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:24,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2026 proven. 1027 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:24,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:24,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241069708] [2021-08-26 03:46:24,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241069708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:24,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357509811] [2021-08-26 03:46:24,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:46:24,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:24,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:24,453 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:24,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 03:46:25,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:46:25,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:25,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 03:46:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 2026 proven. 1027 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:25,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357509811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:25,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:25,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-08-26 03:46:25,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096348569] [2021-08-26 03:46:25,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 03:46:25,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 03:46:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:46:25,496 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:25,556 INFO L93 Difference]: Finished difference Result 249 states and 302 transitions. [2021-08-26 03:46:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 03:46:25,556 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 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 161 [2021-08-26 03:46:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:25,557 INFO L225 Difference]: With dead ends: 249 [2021-08-26 03:46:25,557 INFO L226 Difference]: Without dead ends: 166 [2021-08-26 03:46:25,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 307.5ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-26 03:46:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-26 03:46:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-08-26 03:46:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1646341463414633) internal successors, (191), 164 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:25,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2021-08-26 03:46:25,567 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 161 [2021-08-26 03:46:25,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:25,568 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2021-08-26 03:46:25,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1) internal successors, (93), 30 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2021-08-26 03:46:25,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-08-26 03:46:25,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:25,569 INFO L512 BasicCegarLoop]: trace histogram [53, 52, 27, 26, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:25,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:25,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:25,785 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:25,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:25,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1237906062, now seen corresponding path program 23 times [2021-08-26 03:46:25,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:25,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682342284] [2021-08-26 03:46:25,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:25,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2102 proven. 1107 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:26,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:26,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682342284] [2021-08-26 03:46:26,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682342284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:26,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315554077] [2021-08-26 03:46:26,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:46:26,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:26,226 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:26,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 03:46:26,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 53 check-sat command(s) [2021-08-26 03:46:26,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-26 03:46:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 2102 proven. 1107 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:27,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315554077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:27,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:27,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-08-26 03:46:27,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340779836] [2021-08-26 03:46:27,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-26 03:46:27,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:27,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-26 03:46:27,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-26 03:46:27,365 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:27,446 INFO L93 Difference]: Finished difference Result 252 states and 305 transitions. [2021-08-26 03:46:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 03:46:27,446 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-08-26 03:46:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:27,447 INFO L225 Difference]: With dead ends: 252 [2021-08-26 03:46:27,447 INFO L226 Difference]: Without dead ends: 169 [2021-08-26 03:46:27,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-26 03:46:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-26 03:46:27,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-08-26 03:46:27,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1616766467065869) internal successors, (194), 167 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) [2021-08-26 03:46:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2021-08-26 03:46:27,457 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 164 [2021-08-26 03:46:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:27,458 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2021-08-26 03:46:27,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.096774193548387) internal successors, (96), 31 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:27,458 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2021-08-26 03:46:27,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-08-26 03:46:27,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:27,459 INFO L512 BasicCegarLoop]: trace histogram [54, 53, 28, 26, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:27,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:27,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:27,681 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:27,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1878695931, now seen corresponding path program 24 times [2021-08-26 03:46:27,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:27,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90164405] [2021-08-26 03:46:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:27,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:27,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2178 proven. 1190 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:28,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:28,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90164405] [2021-08-26 03:46:28,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90164405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:28,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32532902] [2021-08-26 03:46:28,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:46:28,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:28,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:28,153 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:28,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 03:46:28,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 54 check-sat command(s) [2021-08-26 03:46:28,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 03:46:28,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 2178 proven. 1190 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:29,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32532902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:29,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:29,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-08-26 03:46:29,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075965135] [2021-08-26 03:46:29,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-26 03:46:29,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-26 03:46:29,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-26 03:46:29,344 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:29,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:29,409 INFO L93 Difference]: Finished difference Result 255 states and 308 transitions. [2021-08-26 03:46:29,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-26 03:46:29,410 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2021-08-26 03:46:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:29,410 INFO L225 Difference]: With dead ends: 255 [2021-08-26 03:46:29,410 INFO L226 Difference]: Without dead ends: 172 [2021-08-26 03:46:29,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 387.8ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-26 03:46:29,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-08-26 03:46:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-08-26 03:46:29,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1588235294117648) internal successors, (197), 170 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 197 transitions. [2021-08-26 03:46:29,420 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 197 transitions. Word has length 167 [2021-08-26 03:46:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:29,420 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 197 transitions. [2021-08-26 03:46:29,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.09375) internal successors, (99), 32 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 197 transitions. [2021-08-26 03:46:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-08-26 03:46:29,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:29,421 INFO L512 BasicCegarLoop]: trace histogram [55, 54, 29, 26, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:29,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:29,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 03:46:29,629 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:29,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:29,629 INFO L82 PathProgramCache]: Analyzing trace with hash 520052590, now seen corresponding path program 25 times [2021-08-26 03:46:29,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:29,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998296974] [2021-08-26 03:46:29,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:29,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2254 proven. 1276 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:30,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:30,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998296974] [2021-08-26 03:46:30,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998296974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:30,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332869975] [2021-08-26 03:46:30,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:46:30,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:30,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:30,135 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:30,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 03:46:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:30,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 03:46:30,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 2254 proven. 1276 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:31,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332869975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:31,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:31,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-08-26 03:46:31,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979150034] [2021-08-26 03:46:31,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-26 03:46:31,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-26 03:46:31,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 03:46:31,397 INFO L87 Difference]: Start difference. First operand 171 states and 197 transitions. Second operand has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:31,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:31,490 INFO L93 Difference]: Finished difference Result 258 states and 311 transitions. [2021-08-26 03:46:31,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 03:46:31,491 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 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 170 [2021-08-26 03:46:31,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:31,491 INFO L225 Difference]: With dead ends: 258 [2021-08-26 03:46:31,492 INFO L226 Difference]: Without dead ends: 175 [2021-08-26 03:46:31,492 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 03:46:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-08-26 03:46:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2021-08-26 03:46:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1560693641618498) internal successors, (200), 173 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 200 transitions. [2021-08-26 03:46:31,501 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 200 transitions. Word has length 170 [2021-08-26 03:46:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:31,501 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 200 transitions. [2021-08-26 03:46:31,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.090909090909091) internal successors, (102), 33 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 200 transitions. [2021-08-26 03:46:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-08-26 03:46:31,502 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:31,502 INFO L512 BasicCegarLoop]: trace histogram [56, 55, 30, 26, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:31,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-26 03:46:31,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-26 03:46:31,703 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:31,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:31,703 INFO L82 PathProgramCache]: Analyzing trace with hash 948078363, now seen corresponding path program 26 times [2021-08-26 03:46:31,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:31,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566366045] [2021-08-26 03:46:31,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:31,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2330 proven. 1365 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:32,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:32,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566366045] [2021-08-26 03:46:32,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566366045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:32,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89724046] [2021-08-26 03:46:32,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:46:32,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:32,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:32,209 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:32,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 03:46:33,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:46:33,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:33,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 03:46:33,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 2330 proven. 1365 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:33,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89724046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:33,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:33,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-08-26 03:46:33,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539894951] [2021-08-26 03:46:33,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 03:46:33,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 03:46:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:46:33,519 INFO L87 Difference]: Start difference. First operand 174 states and 200 transitions. Second operand has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:33,612 INFO L93 Difference]: Finished difference Result 261 states and 314 transitions. [2021-08-26 03:46:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-26 03:46:33,612 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-08-26 03:46:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:33,613 INFO L225 Difference]: With dead ends: 261 [2021-08-26 03:46:33,613 INFO L226 Difference]: Without dead ends: 178 [2021-08-26 03:46:33,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:46:33,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-08-26 03:46:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-08-26 03:46:33,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.1534090909090908) internal successors, (203), 176 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:33,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 203 transitions. [2021-08-26 03:46:33,623 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 203 transitions. Word has length 173 [2021-08-26 03:46:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:33,623 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 203 transitions. [2021-08-26 03:46:33,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.088235294117647) internal successors, (105), 34 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 203 transitions. [2021-08-26 03:46:33,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-08-26 03:46:33,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:33,624 INFO L512 BasicCegarLoop]: trace histogram [57, 56, 31, 26, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:33,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:33,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 03:46:33,849 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:33,850 INFO L82 PathProgramCache]: Analyzing trace with hash 505979982, now seen corresponding path program 27 times [2021-08-26 03:46:33,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:33,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756172116] [2021-08-26 03:46:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:33,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2406 proven. 1457 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2021-08-26 03:46:34,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:34,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756172116] [2021-08-26 03:46:34,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756172116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:34,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166198949] [2021-08-26 03:46:34,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:46:34,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:34,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:34,417 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:34,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 03:46:35,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2021-08-26 03:46:35,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:35,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-26 03:46:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:36,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2786 proven. 1926 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-08-26 03:46:36,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166198949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:36,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:36,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-08-26 03:46:36,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862421970] [2021-08-26 03:46:36,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-26 03:46:36,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:36,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-26 03:46:36,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2021-08-26 03:46:36,794 INFO L87 Difference]: Start difference. First operand 177 states and 203 transitions. Second operand has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:37,947 INFO L93 Difference]: Finished difference Result 738 states and 953 transitions. [2021-08-26 03:46:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-26 03:46:37,948 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 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 176 [2021-08-26 03:46:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:37,950 INFO L225 Difference]: With dead ends: 738 [2021-08-26 03:46:37,950 INFO L226 Difference]: Without dead ends: 655 [2021-08-26 03:46:37,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 1997.3ms TimeCoverageRelationStatistics Valid=3419, Invalid=13093, Unknown=0, NotChecked=0, Total=16512 [2021-08-26 03:46:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-08-26 03:46:37,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 198. [2021-08-26 03:46:37,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.16751269035533) internal successors, (230), 197 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 230 transitions. [2021-08-26 03:46:37,970 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 230 transitions. Word has length 176 [2021-08-26 03:46:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:37,970 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 230 transitions. [2021-08-26 03:46:37,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.4242424242424243) internal successors, (226), 66 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:37,971 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 230 transitions. [2021-08-26 03:46:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-08-26 03:46:37,972 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:37,972 INFO L512 BasicCegarLoop]: trace histogram [64, 63, 32, 32, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:37,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:38,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:38,189 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:38,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:38,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1373262373, now seen corresponding path program 28 times [2021-08-26 03:46:38,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:38,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598424343] [2021-08-26 03:46:38,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:38,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3070 proven. 1552 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:38,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:38,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598424343] [2021-08-26 03:46:38,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598424343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:38,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086788807] [2021-08-26 03:46:38,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:46:38,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:38,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:38,723 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:38,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 03:46:39,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:46:39,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 03:46:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3070 proven. 1552 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:40,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086788807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:40,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:40,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-08-26 03:46:40,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848562660] [2021-08-26 03:46:40,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-26 03:46:40,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-26 03:46:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 03:46:40,172 INFO L87 Difference]: Start difference. First operand 198 states and 230 transitions. Second operand has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:40,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:40,276 INFO L93 Difference]: Finished difference Result 303 states and 368 transitions. [2021-08-26 03:46:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-26 03:46:40,277 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 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 197 [2021-08-26 03:46:40,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:40,277 INFO L225 Difference]: With dead ends: 303 [2021-08-26 03:46:40,277 INFO L226 Difference]: Without dead ends: 202 [2021-08-26 03:46:40,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 03:46:40,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-26 03:46:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-08-26 03:46:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.165) internal successors, (233), 200 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 233 transitions. [2021-08-26 03:46:40,293 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 233 transitions. Word has length 197 [2021-08-26 03:46:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:40,294 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 233 transitions. [2021-08-26 03:46:40,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0833333333333335) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 233 transitions. [2021-08-26 03:46:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-08-26 03:46:40,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:40,295 INFO L512 BasicCegarLoop]: trace histogram [65, 64, 33, 32, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:40,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:40,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:40,509 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:40,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1344545294, now seen corresponding path program 29 times [2021-08-26 03:46:40,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:40,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39094048] [2021-08-26 03:46:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:40,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3164 proven. 1650 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:41,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:41,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39094048] [2021-08-26 03:46:41,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39094048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:41,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591954902] [2021-08-26 03:46:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:46:41,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:41,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:41,107 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:41,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 03:46:42,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2021-08-26 03:46:42,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:42,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 03:46:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3164 proven. 1650 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:42,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591954902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:42,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:42,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-08-26 03:46:42,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825471676] [2021-08-26 03:46:42,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-26 03:46:42,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-26 03:46:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 03:46:42,678 INFO L87 Difference]: Start difference. First operand 201 states and 233 transitions. Second operand has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:42,759 INFO L93 Difference]: Finished difference Result 306 states and 371 transitions. [2021-08-26 03:46:42,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-26 03:46:42,759 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 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 200 [2021-08-26 03:46:42,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:42,760 INFO L225 Difference]: With dead ends: 306 [2021-08-26 03:46:42,760 INFO L226 Difference]: Without dead ends: 205 [2021-08-26 03:46:42,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 512.1ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 03:46:42,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-26 03:46:42,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-08-26 03:46:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.1625615763546797) internal successors, (236), 203 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:42,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 236 transitions. [2021-08-26 03:46:42,776 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 236 transitions. Word has length 200 [2021-08-26 03:46:42,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:42,776 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 236 transitions. [2021-08-26 03:46:42,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.081081081081081) internal successors, (114), 37 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 236 transitions. [2021-08-26 03:46:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-08-26 03:46:42,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:42,778 INFO L512 BasicCegarLoop]: trace histogram [66, 65, 34, 32, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:42,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:42,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:42,993 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1170711301, now seen corresponding path program 30 times [2021-08-26 03:46:42,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:42,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807874531] [2021-08-26 03:46:42,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:42,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3258 proven. 1751 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:43,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:43,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807874531] [2021-08-26 03:46:43,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807874531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:43,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572989656] [2021-08-26 03:46:43,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:46:43,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:43,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:43,576 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:43,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 03:46:44,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 66 check-sat command(s) [2021-08-26 03:46:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 03:46:44,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 3258 proven. 1751 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:45,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572989656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:45,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:45,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-08-26 03:46:45,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77556549] [2021-08-26 03:46:45,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 03:46:45,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 03:46:45,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 03:46:45,237 INFO L87 Difference]: Start difference. First operand 204 states and 236 transitions. Second operand has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:45,346 INFO L93 Difference]: Finished difference Result 309 states and 374 transitions. [2021-08-26 03:46:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 03:46:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 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 203 [2021-08-26 03:46:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:45,349 INFO L225 Difference]: With dead ends: 309 [2021-08-26 03:46:45,349 INFO L226 Difference]: Without dead ends: 208 [2021-08-26 03:46:45,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 492.5ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 03:46:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-26 03:46:45,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-08-26 03:46:45,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.1601941747572815) internal successors, (239), 206 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:45,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 239 transitions. [2021-08-26 03:46:45,368 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 239 transitions. Word has length 203 [2021-08-26 03:46:45,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:45,369 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 239 transitions. [2021-08-26 03:46:45,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0789473684210527) internal successors, (117), 38 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:45,369 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 239 transitions. [2021-08-26 03:46:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-08-26 03:46:45,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:45,370 INFO L512 BasicCegarLoop]: trace histogram [67, 66, 35, 32, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:45,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:45,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-26 03:46:45,585 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1114480366, now seen corresponding path program 31 times [2021-08-26 03:46:45,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:45,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373524446] [2021-08-26 03:46:45,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:45,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:46,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3352 proven. 1855 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:46,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:46,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373524446] [2021-08-26 03:46:46,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373524446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:46,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372080082] [2021-08-26 03:46:46,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:46:46,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:46,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:46,222 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:46,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 03:46:47,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:47,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 03:46:47,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 3352 proven. 1855 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:47,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372080082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:47,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:47,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-08-26 03:46:47,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844916932] [2021-08-26 03:46:47,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-26 03:46:47,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:47,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-26 03:46:47,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:46:47,949 INFO L87 Difference]: Start difference. First operand 207 states and 239 transitions. Second operand has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:48,034 INFO L93 Difference]: Finished difference Result 312 states and 377 transitions. [2021-08-26 03:46:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-26 03:46:48,035 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 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 206 [2021-08-26 03:46:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:48,035 INFO L225 Difference]: With dead ends: 312 [2021-08-26 03:46:48,035 INFO L226 Difference]: Without dead ends: 211 [2021-08-26 03:46:48,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 03:46:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-08-26 03:46:48,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2021-08-26 03:46:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1578947368421053) internal successors, (242), 209 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 242 transitions. [2021-08-26 03:46:48,052 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 242 transitions. Word has length 206 [2021-08-26 03:46:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:48,052 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 242 transitions. [2021-08-26 03:46:48,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.076923076923077) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:48,052 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 242 transitions. [2021-08-26 03:46:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-08-26 03:46:48,053 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:48,053 INFO L512 BasicCegarLoop]: trace histogram [68, 67, 36, 32, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:48,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:48,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:48,265 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash -267176933, now seen corresponding path program 32 times [2021-08-26 03:46:48,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:48,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063873642] [2021-08-26 03:46:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:48,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:48,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3446 proven. 1962 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:48,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:48,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063873642] [2021-08-26 03:46:48,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063873642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:48,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825140731] [2021-08-26 03:46:48,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:46:48,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:48,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:48,939 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:48,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 03:46:50,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:46:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 03:46:50,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:50,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 3446 proven. 1962 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:50,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825140731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:50,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:50,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-08-26 03:46:50,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214026102] [2021-08-26 03:46:50,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-26 03:46:50,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:50,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-26 03:46:50,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 03:46:50,764 INFO L87 Difference]: Start difference. First operand 210 states and 242 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:50,852 INFO L93 Difference]: Finished difference Result 315 states and 380 transitions. [2021-08-26 03:46:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-26 03:46:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 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 209 [2021-08-26 03:46:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:50,853 INFO L225 Difference]: With dead ends: 315 [2021-08-26 03:46:50,853 INFO L226 Difference]: Without dead ends: 214 [2021-08-26 03:46:50,854 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 03:46:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-26 03:46:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-08-26 03:46:50,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.1556603773584906) internal successors, (245), 212 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 245 transitions. [2021-08-26 03:46:50,870 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 245 transitions. Word has length 209 [2021-08-26 03:46:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:50,871 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 245 transitions. [2021-08-26 03:46:50,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 245 transitions. [2021-08-26 03:46:50,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-08-26 03:46:50,872 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:50,872 INFO L512 BasicCegarLoop]: trace histogram [69, 68, 37, 32, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:50,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:51,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:51,097 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:51,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:51,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1746793422, now seen corresponding path program 33 times [2021-08-26 03:46:51,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:51,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438807630] [2021-08-26 03:46:51,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:51,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:51,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3540 proven. 2072 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2021-08-26 03:46:51,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:51,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438807630] [2021-08-26 03:46:51,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438807630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:51,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842436144] [2021-08-26 03:46:51,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:46:51,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:51,780 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:51,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-26 03:46:53,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-08-26 03:46:53,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 71 conjunts are in the unsatisfiable core [2021-08-26 03:46:53,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 3998 proven. 2946 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-08-26 03:46:54,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842436144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:54,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:54,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2021-08-26 03:46:54,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024629008] [2021-08-26 03:46:54,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-26 03:46:54,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:54,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-26 03:46:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2021-08-26 03:46:54,785 INFO L87 Difference]: Start difference. First operand 213 states and 245 transitions. Second operand has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:56,185 INFO L93 Difference]: Finished difference Result 900 states and 1163 transitions. [2021-08-26 03:46:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-08-26 03:46:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 0 states have call successors, (0), 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 212 [2021-08-26 03:46:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:56,188 INFO L225 Difference]: With dead ends: 900 [2021-08-26 03:46:56,188 INFO L226 Difference]: Without dead ends: 799 [2021-08-26 03:46:56,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5440 ImplicationChecksByTransitivity, 2579.4ms TimeCoverageRelationStatistics Valid=4745, Invalid=18511, Unknown=0, NotChecked=0, Total=23256 [2021-08-26 03:46:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-08-26 03:46:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 234. [2021-08-26 03:46:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.167381974248927) internal successors, (272), 233 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-08-26 03:46:56,219 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 212 [2021-08-26 03:46:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:56,219 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-08-26 03:46:56,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.4358974358974357) internal successors, (268), 78 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-08-26 03:46:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-08-26 03:46:56,221 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:56,221 INFO L512 BasicCegarLoop]: trace histogram [76, 75, 38, 38, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:56,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:56,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-26 03:46:56,437 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:56,437 INFO L82 PathProgramCache]: Analyzing trace with hash 625478363, now seen corresponding path program 34 times [2021-08-26 03:46:56,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:56,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669809579] [2021-08-26 03:46:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:56,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:46:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4330 proven. 2185 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:46:57,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:46:57,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669809579] [2021-08-26 03:46:57,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669809579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:57,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505110989] [2021-08-26 03:46:57,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:46:57,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:46:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:46:57,241 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:46:57,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-26 03:46:58,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:46:58,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:46:58,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 03:46:58,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:46:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 4330 proven. 2185 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:46:59,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505110989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:46:59,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:46:59,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-08-26 03:46:59,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911745751] [2021-08-26 03:46:59,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 03:46:59,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:46:59,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 03:46:59,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:46:59,239 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:59,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:46:59,362 INFO L93 Difference]: Finished difference Result 357 states and 434 transitions. [2021-08-26 03:46:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-26 03:46:59,362 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 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 233 [2021-08-26 03:46:59,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:46:59,363 INFO L225 Difference]: With dead ends: 357 [2021-08-26 03:46:59,363 INFO L226 Difference]: Without dead ends: 238 [2021-08-26 03:46:59,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 692.0ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 03:46:59,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-26 03:46:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-08-26 03:46:59,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.1652542372881356) internal successors, (275), 236 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 275 transitions. [2021-08-26 03:46:59,386 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 275 transitions. Word has length 233 [2021-08-26 03:46:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:46:59,387 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 275 transitions. [2021-08-26 03:46:59,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.0714285714285716) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:46:59,387 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 275 transitions. [2021-08-26 03:46:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-08-26 03:46:59,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:46:59,387 INFO L512 BasicCegarLoop]: trace histogram [77, 76, 39, 38, 1, 1, 1, 1, 1, 1] [2021-08-26 03:46:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-26 03:46:59,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-26 03:46:59,588 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:46:59,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:46:59,588 INFO L82 PathProgramCache]: Analyzing trace with hash 378249614, now seen corresponding path program 35 times [2021-08-26 03:46:59,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:46:59,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913070874] [2021-08-26 03:46:59,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:46:59,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:46:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4442 proven. 2301 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:00,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:00,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913070874] [2021-08-26 03:47:00,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913070874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:00,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180960887] [2021-08-26 03:47:00,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:47:00,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:00,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:00,382 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:00,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-26 03:47:01,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 77 check-sat command(s) [2021-08-26 03:47:01,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:01,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-26 03:47:02,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 4442 proven. 2301 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:02,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180960887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:02,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:02,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-08-26 03:47:02,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133235468] [2021-08-26 03:47:02,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-26 03:47:02,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-26 03:47:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 03:47:02,582 INFO L87 Difference]: Start difference. First operand 237 states and 275 transitions. Second operand has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:02,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:02,683 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2021-08-26 03:47:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-26 03:47:02,684 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 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 236 [2021-08-26 03:47:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:02,686 INFO L225 Difference]: With dead ends: 360 [2021-08-26 03:47:02,686 INFO L226 Difference]: Without dead ends: 241 [2021-08-26 03:47:02,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 681.1ms TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 03:47:02,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-26 03:47:02,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2021-08-26 03:47:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1631799163179917) internal successors, (278), 239 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:02,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 278 transitions. [2021-08-26 03:47:02,712 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 278 transitions. Word has length 236 [2021-08-26 03:47:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:02,712 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 278 transitions. [2021-08-26 03:47:02,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0697674418604652) internal successors, (132), 43 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 278 transitions. [2021-08-26 03:47:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-08-26 03:47:02,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:02,714 INFO L512 BasicCegarLoop]: trace histogram [78, 77, 40, 38, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:02,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-26 03:47:02,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-26 03:47:02,929 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:02,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:02,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1055500795, now seen corresponding path program 36 times [2021-08-26 03:47:02,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:02,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333200577] [2021-08-26 03:47:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:02,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:02,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4554 proven. 2420 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:03,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:03,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333200577] [2021-08-26 03:47:03,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333200577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:03,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692612514] [2021-08-26 03:47:03,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:47:03,762 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:03,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:03,765 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:03,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-26 03:47:05,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 78 check-sat command(s) [2021-08-26 03:47:05,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:05,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 03:47:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 4554 proven. 2420 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:05,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692612514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:05,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:05,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-08-26 03:47:05,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341511660] [2021-08-26 03:47:05,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-26 03:47:05,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:05,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-26 03:47:05,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 03:47:05,961 INFO L87 Difference]: Start difference. First operand 240 states and 278 transitions. Second operand has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:06,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:06,060 INFO L93 Difference]: Finished difference Result 363 states and 440 transitions. [2021-08-26 03:47:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-26 03:47:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 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 239 [2021-08-26 03:47:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:06,061 INFO L225 Difference]: With dead ends: 363 [2021-08-26 03:47:06,061 INFO L226 Difference]: Without dead ends: 244 [2021-08-26 03:47:06,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 708.5ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 03:47:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-26 03:47:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-08-26 03:47:06,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.1611570247933884) internal successors, (281), 242 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) [2021-08-26 03:47:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 281 transitions. [2021-08-26 03:47:06,085 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 281 transitions. Word has length 239 [2021-08-26 03:47:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:06,085 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 281 transitions. [2021-08-26 03:47:06,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.0681818181818183) internal successors, (135), 44 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 281 transitions. [2021-08-26 03:47:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-08-26 03:47:06,087 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:06,087 INFO L512 BasicCegarLoop]: trace histogram [79, 78, 41, 38, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:06,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:06,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-26 03:47:06,301 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash -710922642, now seen corresponding path program 37 times [2021-08-26 03:47:06,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:06,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120647726] [2021-08-26 03:47:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:06,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:07,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4666 proven. 2542 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:07,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:07,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120647726] [2021-08-26 03:47:07,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120647726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:07,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180701395] [2021-08-26 03:47:07,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:47:07,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:07,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:07,141 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:07,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-26 03:47:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:08,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 03:47:08,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 4666 proven. 2542 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:09,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180701395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:09,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:09,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-08-26 03:47:09,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639318509] [2021-08-26 03:47:09,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-26 03:47:09,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-26 03:47:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 03:47:09,360 INFO L87 Difference]: Start difference. First operand 243 states and 281 transitions. Second operand has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:09,483 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2021-08-26 03:47:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-26 03:47:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 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 242 [2021-08-26 03:47:09,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:09,484 INFO L225 Difference]: With dead ends: 366 [2021-08-26 03:47:09,485 INFO L226 Difference]: Without dead ends: 247 [2021-08-26 03:47:09,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 732.6ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 03:47:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-08-26 03:47:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2021-08-26 03:47:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.1591836734693877) internal successors, (284), 245 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 284 transitions. [2021-08-26 03:47:09,509 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 284 transitions. Word has length 242 [2021-08-26 03:47:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:09,510 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 284 transitions. [2021-08-26 03:47:09,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.066666666666667) internal successors, (138), 45 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 284 transitions. [2021-08-26 03:47:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-08-26 03:47:09,511 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:09,511 INFO L512 BasicCegarLoop]: trace histogram [80, 79, 42, 38, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:09,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:09,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-26 03:47:09,725 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:09,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:09,725 INFO L82 PathProgramCache]: Analyzing trace with hash 2002743579, now seen corresponding path program 38 times [2021-08-26 03:47:09,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:09,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118070417] [2021-08-26 03:47:09,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:09,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4778 proven. 2667 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:10,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:10,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118070417] [2021-08-26 03:47:10,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118070417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:10,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656386971] [2021-08-26 03:47:10,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:47:10,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:10,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:10,564 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:10,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-26 03:47:12,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:47:12,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:12,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 03:47:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 4778 proven. 2667 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:12,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656386971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:12,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:12,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-08-26 03:47:12,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491593013] [2021-08-26 03:47:12,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-26 03:47:12,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-26 03:47:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 03:47:12,896 INFO L87 Difference]: Start difference. First operand 246 states and 284 transitions. Second operand has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:13,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:13,010 INFO L93 Difference]: Finished difference Result 369 states and 446 transitions. [2021-08-26 03:47:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-26 03:47:13,011 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 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 245 [2021-08-26 03:47:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:13,012 INFO L225 Difference]: With dead ends: 369 [2021-08-26 03:47:13,012 INFO L226 Difference]: Without dead ends: 250 [2021-08-26 03:47:13,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 03:47:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-08-26 03:47:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-08-26 03:47:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.157258064516129) internal successors, (287), 248 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2021-08-26 03:47:13,032 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 245 [2021-08-26 03:47:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:13,032 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2021-08-26 03:47:13,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0652173913043477) internal successors, (141), 46 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2021-08-26 03:47:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-08-26 03:47:13,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:13,034 INFO L512 BasicCegarLoop]: trace histogram [81, 80, 43, 38, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:13,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:13,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-26 03:47:13,257 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:13,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:13,257 INFO L82 PathProgramCache]: Analyzing trace with hash 663720782, now seen corresponding path program 39 times [2021-08-26 03:47:13,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:13,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7357899] [2021-08-26 03:47:13,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:13,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 4890 proven. 2795 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2021-08-26 03:47:14,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:14,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7357899] [2021-08-26 03:47:14,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7357899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:14,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649530749] [2021-08-26 03:47:14,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:47:14,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:14,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:14,179 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:14,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-26 03:47:16,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 81 check-sat command(s) [2021-08-26 03:47:16,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-26 03:47:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 5426 proven. 4182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-08-26 03:47:18,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649530749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:18,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:18,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2021-08-26 03:47:18,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589411563] [2021-08-26 03:47:18,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-26 03:47:18,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-26 03:47:18,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2021-08-26 03:47:18,215 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:19,875 INFO L93 Difference]: Finished difference Result 1062 states and 1373 transitions. [2021-08-26 03:47:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-08-26 03:47:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 0 states have call successors, (0), 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 248 [2021-08-26 03:47:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:19,878 INFO L225 Difference]: With dead ends: 1062 [2021-08-26 03:47:19,878 INFO L226 Difference]: Without dead ends: 943 [2021-08-26 03:47:19,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7354 ImplicationChecksByTransitivity, 3385.0ms TimeCoverageRelationStatistics Valid=6287, Invalid=24865, Unknown=0, NotChecked=0, Total=31152 [2021-08-26 03:47:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-08-26 03:47:19,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 270. [2021-08-26 03:47:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1672862453531598) internal successors, (314), 269 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 314 transitions. [2021-08-26 03:47:19,923 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 314 transitions. Word has length 248 [2021-08-26 03:47:19,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:19,923 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 314 transitions. [2021-08-26 03:47:19,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.4444444444444446) internal successors, (310), 90 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 314 transitions. [2021-08-26 03:47:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-08-26 03:47:19,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:19,925 INFO L512 BasicCegarLoop]: trace histogram [88, 87, 44, 44, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:19,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:20,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-26 03:47:20,141 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:20,141 INFO L82 PathProgramCache]: Analyzing trace with hash 665450459, now seen corresponding path program 40 times [2021-08-26 03:47:20,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:20,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170872090] [2021-08-26 03:47:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:20,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:20,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5806 proven. 2926 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-08-26 03:47:21,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:21,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170872090] [2021-08-26 03:47:21,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170872090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:21,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551451152] [2021-08-26 03:47:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:47:21,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:21,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:21,116 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:21,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-26 03:47:23,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:47:23,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 03:47:23,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 5806 proven. 2926 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-08-26 03:47:23,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551451152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:23,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-08-26 03:47:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527665617] [2021-08-26 03:47:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-26 03:47:23,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-26 03:47:23,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:47:23,719 INFO L87 Difference]: Start difference. First operand 270 states and 314 transitions. Second operand has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:23,854 INFO L93 Difference]: Finished difference Result 411 states and 500 transitions. [2021-08-26 03:47:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-26 03:47:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 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 269 [2021-08-26 03:47:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:23,856 INFO L225 Difference]: With dead ends: 411 [2021-08-26 03:47:23,856 INFO L226 Difference]: Without dead ends: 274 [2021-08-26 03:47:23,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 854.7ms TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 03:47:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-08-26 03:47:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-08-26 03:47:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.1654411764705883) internal successors, (317), 272 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 317 transitions. [2021-08-26 03:47:23,894 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 317 transitions. Word has length 269 [2021-08-26 03:47:23,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:23,894 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 317 transitions. [2021-08-26 03:47:23,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0625) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 317 transitions. [2021-08-26 03:47:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-08-26 03:47:23,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:23,896 INFO L512 BasicCegarLoop]: trace histogram [89, 88, 45, 44, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:23,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:24,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-26 03:47:24,105 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:24,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash 129200398, now seen corresponding path program 41 times [2021-08-26 03:47:24,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:24,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244534013] [2021-08-26 03:47:24,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:24,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:24,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5936 proven. 3060 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-08-26 03:47:25,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:25,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244534013] [2021-08-26 03:47:25,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244534013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:25,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771242896] [2021-08-26 03:47:25,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:47:25,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:25,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:25,054 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:25,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-26 03:47:27,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2021-08-26 03:47:27,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-26 03:47:27,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 5936 proven. 3060 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-08-26 03:47:27,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771242896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:27,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:27,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-08-26 03:47:27,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487806487] [2021-08-26 03:47:27,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-26 03:47:27,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-26 03:47:27,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 03:47:27,737 INFO L87 Difference]: Start difference. First operand 273 states and 317 transitions. Second operand has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:27,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:27,854 INFO L93 Difference]: Finished difference Result 414 states and 503 transitions. [2021-08-26 03:47:27,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-26 03:47:27,854 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 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 272 [2021-08-26 03:47:27,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:27,855 INFO L225 Difference]: With dead ends: 414 [2021-08-26 03:47:27,855 INFO L226 Difference]: Without dead ends: 277 [2021-08-26 03:47:27,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 833.7ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 03:47:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-08-26 03:47:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2021-08-26 03:47:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.1636363636363636) internal successors, (320), 275 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 320 transitions. [2021-08-26 03:47:27,881 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 320 transitions. Word has length 272 [2021-08-26 03:47:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:27,882 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 320 transitions. [2021-08-26 03:47:27,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.061224489795918) internal successors, (150), 49 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 320 transitions. [2021-08-26 03:47:27,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-08-26 03:47:27,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:27,883 INFO L512 BasicCegarLoop]: trace histogram [90, 89, 46, 44, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:27,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:28,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:28,083 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1981974267, now seen corresponding path program 42 times [2021-08-26 03:47:28,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:28,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115516644] [2021-08-26 03:47:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:28,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 6066 proven. 3197 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2021-08-26 03:47:29,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:29,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115516644] [2021-08-26 03:47:29,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115516644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:29,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14712569] [2021-08-26 03:47:29,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:47:29,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:29,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:29,057 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:29,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-26 03:47:31,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 90 check-sat command(s) [2021-08-26 03:47:31,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:31,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-26 03:47:31,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 6251 proven. 5634 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-08-26 03:47:33,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14712569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:33,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:33,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2021-08-26 03:47:33,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366732936] [2021-08-26 03:47:33,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-08-26 03:47:33,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-08-26 03:47:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 03:47:33,641 INFO L87 Difference]: Start difference. First operand 276 states and 320 transitions. Second operand has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:35,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:35,479 INFO L93 Difference]: Finished difference Result 816 states and 1040 transitions. [2021-08-26 03:47:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-08-26 03:47:35,479 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 0 states have call successors, (0), 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 275 [2021-08-26 03:47:35,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:35,481 INFO L225 Difference]: With dead ends: 816 [2021-08-26 03:47:35,481 INFO L226 Difference]: Without dead ends: 679 [2021-08-26 03:47:35,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8419 ImplicationChecksByTransitivity, 3782.7ms TimeCoverageRelationStatistics Valid=7139, Invalid=28393, Unknown=0, NotChecked=0, Total=35532 [2021-08-26 03:47:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-08-26 03:47:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 288. [2021-08-26 03:47:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1672473867595818) internal successors, (335), 287 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 335 transitions. [2021-08-26 03:47:35,522 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 335 transitions. Word has length 275 [2021-08-26 03:47:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:35,523 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 335 transitions. [2021-08-26 03:47:35,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.4791666666666665) internal successors, (334), 96 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 335 transitions. [2021-08-26 03:47:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-08-26 03:47:35,524 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:35,524 INFO L512 BasicCegarLoop]: trace histogram [94, 93, 47, 47, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:35,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-26 03:47:35,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:35,731 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:35,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:35,731 INFO L82 PathProgramCache]: Analyzing trace with hash -738002307, now seen corresponding path program 43 times [2021-08-26 03:47:35,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:35,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112657389] [2021-08-26 03:47:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:35,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6625 proven. 3337 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-08-26 03:47:36,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:36,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112657389] [2021-08-26 03:47:36,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112657389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:36,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457734258] [2021-08-26 03:47:36,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 03:47:36,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:36,802 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:36,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-26 03:47:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-26 03:47:39,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 6625 proven. 3337 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-08-26 03:47:39,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457734258] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:39,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:39,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-08-26 03:47:39,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611569355] [2021-08-26 03:47:39,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-26 03:47:39,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:39,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-26 03:47:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 03:47:39,674 INFO L87 Difference]: Start difference. First operand 288 states and 335 transitions. Second operand has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:39,800 INFO L93 Difference]: Finished difference Result 438 states and 533 transitions. [2021-08-26 03:47:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-26 03:47:39,801 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 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 287 [2021-08-26 03:47:39,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:39,801 INFO L225 Difference]: With dead ends: 438 [2021-08-26 03:47:39,801 INFO L226 Difference]: Without dead ends: 292 [2021-08-26 03:47:39,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 926.8ms TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 03:47:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-08-26 03:47:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-08-26 03:47:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1655172413793105) internal successors, (338), 290 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 338 transitions. [2021-08-26 03:47:39,846 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 338 transitions. Word has length 287 [2021-08-26 03:47:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:39,846 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 338 transitions. [2021-08-26 03:47:39,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.0588235294117645) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 338 transitions. [2021-08-26 03:47:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-08-26 03:47:39,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:39,848 INFO L512 BasicCegarLoop]: trace histogram [95, 94, 48, 47, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:39,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:40,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-26 03:47:40,073 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:40,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:40,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1527665424, now seen corresponding path program 44 times [2021-08-26 03:47:40,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:40,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919708677] [2021-08-26 03:47:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:40,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6764 proven. 3480 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-08-26 03:47:41,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:41,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919708677] [2021-08-26 03:47:41,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919708677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:41,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794253058] [2021-08-26 03:47:41,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:47:41,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:41,135 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:41,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-26 03:47:43,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:47:43,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-26 03:47:43,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 6764 proven. 3480 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-08-26 03:47:44,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794253058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:44,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:44,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-08-26 03:47:44,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111058391] [2021-08-26 03:47:44,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-26 03:47:44,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:44,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-26 03:47:44,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 03:47:44,166 INFO L87 Difference]: Start difference. First operand 291 states and 338 transitions. Second operand has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:44,295 INFO L93 Difference]: Finished difference Result 441 states and 536 transitions. [2021-08-26 03:47:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-26 03:47:44,296 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 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 290 [2021-08-26 03:47:44,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:44,296 INFO L225 Difference]: With dead ends: 441 [2021-08-26 03:47:44,296 INFO L226 Difference]: Without dead ends: 295 [2021-08-26 03:47:44,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 938.6ms TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 03:47:44,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-08-26 03:47:44,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2021-08-26 03:47:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.1638225255972696) internal successors, (341), 293 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:44,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 341 transitions. [2021-08-26 03:47:44,341 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 341 transitions. Word has length 290 [2021-08-26 03:47:44,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:44,341 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 341 transitions. [2021-08-26 03:47:44,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0576923076923075) internal successors, (159), 52 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:44,341 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 341 transitions. [2021-08-26 03:47:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2021-08-26 03:47:44,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:44,342 INFO L512 BasicCegarLoop]: trace histogram [96, 95, 49, 47, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:44,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:44,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-26 03:47:44,543 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:44,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1449263517, now seen corresponding path program 45 times [2021-08-26 03:47:44,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:44,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418280413] [2021-08-26 03:47:44,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:44,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 6903 proven. 3626 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2021-08-26 03:47:45,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:45,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418280413] [2021-08-26 03:47:45,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418280413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:45,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812288724] [2021-08-26 03:47:45,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:47:45,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:45,651 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:45,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-26 03:47:48,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 96 check-sat command(s) [2021-08-26 03:47:48,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-26 03:47:48,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:47:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7100 proven. 6441 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-08-26 03:47:50,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812288724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:50,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:47:50,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 102 [2021-08-26 03:47:50,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164422936] [2021-08-26 03:47:50,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-08-26 03:47:50,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:47:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-08-26 03:47:50,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 03:47:50,909 INFO L87 Difference]: Start difference. First operand 294 states and 341 transitions. Second operand has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:55,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:47:55,100 INFO L93 Difference]: Finished difference Result 1049 states and 1288 transitions. [2021-08-26 03:47:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2021-08-26 03:47:55,101 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 293 [2021-08-26 03:47:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:47:55,104 INFO L225 Difference]: With dead ends: 1049 [2021-08-26 03:47:55,105 INFO L226 Difference]: Without dead ends: 903 [2021-08-26 03:47:55,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17740 ImplicationChecksByTransitivity, 6423.5ms TimeCoverageRelationStatistics Valid=12989, Invalid=48763, Unknown=0, NotChecked=0, Total=61752 [2021-08-26 03:47:55,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-08-26 03:47:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 306. [2021-08-26 03:47:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1672131147540983) internal successors, (356), 305 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 356 transitions. [2021-08-26 03:47:55,162 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 356 transitions. Word has length 293 [2021-08-26 03:47:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:47:55,162 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 356 transitions. [2021-08-26 03:47:55,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 3.480392156862745) internal successors, (355), 102 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:47:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 356 transitions. [2021-08-26 03:47:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2021-08-26 03:47:55,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:47:55,163 INFO L512 BasicCegarLoop]: trace histogram [100, 99, 50, 50, 1, 1, 1, 1, 1, 1] [2021-08-26 03:47:55,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-26 03:47:55,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-26 03:47:55,364 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:47:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:47:55,364 INFO L82 PathProgramCache]: Analyzing trace with hash -933268261, now seen corresponding path program 46 times [2021-08-26 03:47:55,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:47:55,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809258624] [2021-08-26 03:47:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:47:55,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:47:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:47:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7203 proven. 7500 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-08-26 03:47:56,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:47:56,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809258624] [2021-08-26 03:47:56,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809258624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:47:56,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985828937] [2021-08-26 03:47:56,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:47:56,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:47:56,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:47:56,726 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:47:56,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-26 03:47:59,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:47:59,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:47:59,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-26 03:47:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:48:00,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7401 proven. 7302 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-08-26 03:48:00,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985828937] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:48:00,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:48:00,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 54 [2021-08-26 03:48:00,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343866605] [2021-08-26 03:48:00,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-26 03:48:00,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:48:00,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-26 03:48:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 03:48:00,065 INFO L87 Difference]: Start difference. First operand 306 states and 356 transitions. Second operand has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:48:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:48:00,426 INFO L93 Difference]: Finished difference Result 461 states and 561 transitions. [2021-08-26 03:48:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 03:48:00,426 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 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 305 [2021-08-26 03:48:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:48:00,427 INFO L225 Difference]: With dead ends: 461 [2021-08-26 03:48:00,427 INFO L226 Difference]: Without dead ends: 457 [2021-08-26 03:48:00,428 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1058.0ms TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 03:48:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-08-26 03:48:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 309. [2021-08-26 03:48:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.1688311688311688) internal successors, (360), 308 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:48:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2021-08-26 03:48:00,477 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 305 [2021-08-26 03:48:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:48:00,478 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2021-08-26 03:48:00,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.888888888888889) internal successors, (210), 54 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:48:00,478 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2021-08-26 03:48:00,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-08-26 03:48:00,480 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:48:00,480 INFO L512 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1] [2021-08-26 03:48:00,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-26 03:48:00,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:48:00,705 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:48:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:48:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash -338193904, now seen corresponding path program 47 times [2021-08-26 03:48:00,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:48:00,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878213391] [2021-08-26 03:48:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:48:00,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:48:00,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:48:04,461 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:48:04,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:48:04,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878213391] [2021-08-26 03:48:04,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878213391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:48:04,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194269657] [2021-08-26 03:48:04,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:48:04,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:48:04,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:48:04,463 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:48:04,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-26 03:48:07,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 101 check-sat command(s) [2021-08-26 03:48:07,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:48:07,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 205 conjunts are in the unsatisfiable core [2021-08-26 03:48:07,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:48:12,228 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:48:12,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194269657] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:48:12,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:48:12,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104] total 155 [2021-08-26 03:48:12,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174831401] [2021-08-26 03:48:12,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2021-08-26 03:48:12,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:48:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2021-08-26 03:48:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2858, Invalid=21012, Unknown=0, NotChecked=0, Total=23870 [2021-08-26 03:48:12,232 INFO L87 Difference]: Start difference. First operand 309 states and 360 transitions. Second operand has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:48:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:48:20,196 INFO L93 Difference]: Finished difference Result 4542 states and 5921 transitions. [2021-08-26 03:48:20,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-26 03:48:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 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 308 [2021-08-26 03:48:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:48:20,208 INFO L225 Difference]: With dead ends: 4542 [2021-08-26 03:48:20,208 INFO L226 Difference]: Without dead ends: 4382 [2021-08-26 03:48:20,210 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 257 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7851 ImplicationChecksByTransitivity, 6665.3ms TimeCoverageRelationStatistics Valid=2863, Invalid=21317, Unknown=0, NotChecked=0, Total=24180 [2021-08-26 03:48:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-08-26 03:48:21,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 4186. [2021-08-26 03:48:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4186 states, 4185 states have (on average 1.0241338112305853) internal successors, (4286), 4185 states have internal predecessors, (4286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:48:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4186 states to 4186 states and 4286 transitions. [2021-08-26 03:48:21,255 INFO L78 Accepts]: Start accepts. Automaton has 4186 states and 4286 transitions. Word has length 308 [2021-08-26 03:48:21,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:48:21,256 INFO L470 AbstractCegarLoop]: Abstraction has 4186 states and 4286 transitions. [2021-08-26 03:48:21,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.967741935483871) internal successors, (460), 155 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:48:21,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4186 states and 4286 transitions. [2021-08-26 03:48:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-08-26 03:48:21,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:48:21,258 INFO L512 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1] [2021-08-26 03:48:21,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-26 03:48:21,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-26 03:48:21,475 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:48:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:48:21,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2103022405, now seen corresponding path program 48 times [2021-08-26 03:48:21,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:48:21,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637203480] [2021-08-26 03:48:21,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:48:21,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:48:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:48:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-08-26 03:48:22,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:48:22,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637203480] [2021-08-26 03:48:22,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637203480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:48:22,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100911939] [2021-08-26 03:48:22,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 03:48:22,880 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:48:22,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:48:22,880 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:48:22,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-26 03:48:25,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 102 check-sat command(s) [2021-08-26 03:48:25,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:48:25,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 103 conjunts are in the unsatisfiable core [2021-08-26 03:48:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:48:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-08-26 03:48:26,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100911939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:48:26,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:48:26,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 55 [2021-08-26 03:48:26,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266337820] [2021-08-26 03:48:26,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-26 03:48:26,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:48:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-26 03:48:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-08-26 03:48:26,809 INFO L87 Difference]: Start difference. First operand 4186 states and 4286 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:48:27,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:48:27,067 INFO L93 Difference]: Finished difference Result 4337 states and 4437 transitions. [2021-08-26 03:48:27,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-26 03:48:27,070 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 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 311 [2021-08-26 03:48:27,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:48:27,070 INFO L225 Difference]: With dead ends: 4337 [2021-08-26 03:48:27,070 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:48:27,074 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1095.4ms TimeCoverageRelationStatistics Valid=1484, Invalid=1486, Unknown=0, NotChecked=0, Total=2970 [2021-08-26 03:48:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:48:27,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:48:27,074 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) [2021-08-26 03:48:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:48:27,075 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 311 [2021-08-26 03:48:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:48:27,075 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:48:27,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 55 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:48:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:48:27,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:48:27,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:48:27,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-26 03:48:27,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:48:27,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:48:27,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:48:27,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:48:27,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:48:38,658 WARN L207 SmtUtils]: Spent 11.36 s on a formula simplification. DAG size of input: 2236 DAG size of output: 1660 [2021-08-26 03:49:14,527 WARN L207 SmtUtils]: Spent 35.85 s on a formula simplification. DAG size of input: 1611 DAG size of output: 458 [2021-08-26 03:49:14,541 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:49:14,541 INFO L857 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-08-26 03:49:14,541 INFO L857 garLoopResultBuilder]: For program point L29-2(lines 28 36) no Hoare annotation was computed. [2021-08-26 03:49:14,541 INFO L857 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-08-26 03:49:14,542 INFO L860 garLoopResultBuilder]: At program point L38(lines 24 39) the Hoare annotation is: true [2021-08-26 03:49:14,542 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:49:14,542 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:49:14,542 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:49:14,543 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 28 36) the Hoare annotation is: (let ((.cse10 (<= ULTIMATE.start_main_~y~0 44)) (.cse11 (<= 44 ULTIMATE.start_main_~y~0)) (.cse24 (<= ULTIMATE.start_main_~y~0 42)) (.cse25 (<= 42 ULTIMATE.start_main_~y~0)) (.cse22 (<= ULTIMATE.start_main_~y~0 22)) (.cse23 (<= 22 ULTIMATE.start_main_~y~0)) (.cse41 (<= 35 ULTIMATE.start_main_~y~0)) (.cse42 (<= ULTIMATE.start_main_~y~0 35)) (.cse59 (<= ULTIMATE.start_main_~y~0 39)) (.cse60 (<= 39 ULTIMATE.start_main_~y~0)) (.cse16 (<= ULTIMATE.start_main_~y~0 16)) (.cse17 (<= 16 ULTIMATE.start_main_~y~0)) (.cse6 (<= ULTIMATE.start_main_~y~0 37)) (.cse7 (<= 37 ULTIMATE.start_main_~y~0)) (.cse45 (<= 36 ULTIMATE.start_main_~y~0)) (.cse46 (<= ULTIMATE.start_main_~y~0 36)) (.cse37 (<= 32 ULTIMATE.start_main_~y~0)) (.cse38 (<= ULTIMATE.start_main_~y~0 32)) (.cse73 (<= 12 ULTIMATE.start_main_~y~0)) (.cse74 (<= ULTIMATE.start_main_~y~0 12)) (.cse8 (<= ULTIMATE.start_main_~y~0 46)) (.cse9 (<= 46 ULTIMATE.start_main_~y~0)) (.cse71 (<= 2 ULTIMATE.start_main_~y~0)) (.cse72 (<= ULTIMATE.start_main_~y~0 2)) (.cse65 (<= 11 ULTIMATE.start_main_~y~0)) (.cse66 (<= ULTIMATE.start_main_~y~0 11)) (.cse47 (<= 47 ULTIMATE.start_main_~y~0)) (.cse48 (<= ULTIMATE.start_main_~y~0 47)) (.cse49 (<= ULTIMATE.start_main_~y~0 33)) (.cse50 (<= 33 ULTIMATE.start_main_~y~0)) (.cse57 (<= 26 ULTIMATE.start_main_~y~0)) (.cse58 (<= ULTIMATE.start_main_~y~0 26)) (.cse12 (<= 41 ULTIMATE.start_main_~y~0)) (.cse13 (<= ULTIMATE.start_main_~y~0 41)) (.cse29 (<= 8 ULTIMATE.start_main_~y~0)) (.cse30 (<= ULTIMATE.start_main_~y~0 8)) (.cse77 (<= ULTIMATE.start_main_~y~0 45)) (.cse78 (<= 45 ULTIMATE.start_main_~y~0)) (.cse51 (<= ULTIMATE.start_main_~y~0 30)) (.cse52 (<= 30 ULTIMATE.start_main_~y~0)) (.cse39 (<= 15 ULTIMATE.start_main_~y~0)) (.cse40 (<= ULTIMATE.start_main_~y~0 15)) (.cse27 (<= 40 ULTIMATE.start_main_~y~0)) (.cse28 (<= ULTIMATE.start_main_~y~0 40)) (.cse2 (<= ULTIMATE.start_main_~y~0 20)) (.cse3 (<= 20 ULTIMATE.start_main_~y~0)) (.cse31 (<= 29 ULTIMATE.start_main_~y~0)) (.cse32 (<= ULTIMATE.start_main_~y~0 29)) (.cse20 (<= 10 ULTIMATE.start_main_~y~0)) (.cse21 (<= ULTIMATE.start_main_~y~0 10)) (.cse79 (<= 48 ULTIMATE.start_main_~y~0)) (.cse80 (<= ULTIMATE.start_main_~y~0 48)) (.cse35 (<= ULTIMATE.start_main_~y~0 4)) (.cse36 (<= 4 ULTIMATE.start_main_~y~0)) (.cse43 (<= 7 ULTIMATE.start_main_~y~0)) (.cse44 (<= ULTIMATE.start_main_~y~0 7)) (.cse61 (<= 25 ULTIMATE.start_main_~y~0)) (.cse62 (<= ULTIMATE.start_main_~y~0 25)) (.cse69 (<= 19 ULTIMATE.start_main_~y~0)) (.cse70 (<= ULTIMATE.start_main_~y~0 19)) (.cse85 (<= 1 ULTIMATE.start_main_~y~0)) (.cse86 (<= ULTIMATE.start_main_~y~0 1)) (.cse67 (<= 38 ULTIMATE.start_main_~y~0)) (.cse68 (<= ULTIMATE.start_main_~y~0 38)) (.cse63 (<= ULTIMATE.start_main_~y~0 14)) (.cse64 (<= 14 ULTIMATE.start_main_~y~0)) (.cse18 (<= ULTIMATE.start_main_~y~0 6)) (.cse19 (<= 6 ULTIMATE.start_main_~y~0)) (.cse53 (<= ULTIMATE.start_main_~y~0 21)) (.cse54 (<= 21 ULTIMATE.start_main_~y~0)) (.cse55 (<= 5 ULTIMATE.start_main_~y~0)) (.cse56 (<= ULTIMATE.start_main_~y~0 5)) (.cse4 (<= 9 ULTIMATE.start_main_~y~0)) (.cse5 (<= ULTIMATE.start_main_~y~0 9)) (.cse81 (<= 28 ULTIMATE.start_main_~y~0)) (.cse82 (<= ULTIMATE.start_main_~y~0 28)) (.cse89 (<= ULTIMATE.start_main_~y~0 34)) (.cse90 (<= 34 ULTIMATE.start_main_~y~0)) (.cse26 (= ULTIMATE.start_main_~y~0 0)) (.cse0 (<= ULTIMATE.start_main_~y~0 24)) (.cse1 (<= 24 ULTIMATE.start_main_~y~0)) (.cse93 (<= ULTIMATE.start_main_~y~0 23)) (.cse94 (<= 23 ULTIMATE.start_main_~y~0)) (.cse83 (<= 27 ULTIMATE.start_main_~y~0)) (.cse84 (<= ULTIMATE.start_main_~y~0 27)) (.cse33 (<= 18 ULTIMATE.start_main_~y~0)) (.cse34 (<= ULTIMATE.start_main_~y~0 18)) (.cse97 (<= ULTIMATE.start_main_~y~0 3)) (.cse98 (<= 3 ULTIMATE.start_main_~y~0)) (.cse91 (<= ULTIMATE.start_main_~y~0 49)) (.cse92 (<= 49 ULTIMATE.start_main_~y~0)) (.cse14 (<= ULTIMATE.start_main_~y~0 13)) (.cse15 (<= 13 ULTIMATE.start_main_~y~0)) (.cse87 (<= ULTIMATE.start_main_~y~0 17)) (.cse88 (<= 17 ULTIMATE.start_main_~y~0)) (.cse95 (<= ULTIMATE.start_main_~y~0 31)) (.cse96 (<= 31 ULTIMATE.start_main_~y~0)) (.cse75 (<= 43 ULTIMATE.start_main_~y~0)) (.cse76 (<= ULTIMATE.start_main_~y~0 43))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~x~0 24)) (and (= ULTIMATE.start_main_~x~0 20) .cse2 .cse3) (and .cse4 (= ULTIMATE.start_main_~x~0 9) .cse5) (and (<= ULTIMATE.start_main_~x~0 63) .cse6 .cse7 (<= 63 ULTIMATE.start_main_~x~0)) (and .cse8 (= ULTIMATE.start_main_~x~0 46) .cse9) (and (= ULTIMATE.start_main_~x~0 44) .cse10 .cse11) (and (= 41 ULTIMATE.start_main_~x~0) .cse12 .cse13) (and .cse14 (<= ULTIMATE.start_main_~x~0 87) .cse15 (<= 87 ULTIMATE.start_main_~x~0)) (and .cse16 .cse17 (= ULTIMATE.start_main_~x~0 16)) (and .cse18 (= ULTIMATE.start_main_~x~0 6) .cse19) (and (<= 56 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 56) .cse10 .cse11) (and .cse20 (<= 90 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 90) .cse21) (and .cse22 (<= 78 ULTIMATE.start_main_~x~0) .cse23 (<= ULTIMATE.start_main_~x~0 78)) (and .cse24 .cse25 (= ULTIMATE.start_main_~x~0 42)) (and .cse26 (= ULTIMATE.start_main_~x~0 0)) (and .cse24 .cse25 (<= 58 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 58)) (and .cse27 .cse28 (<= ULTIMATE.start_main_~x~0 60) (<= 60 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 8) .cse29 .cse30) (and .cse31 .cse32 (= ULTIMATE.start_main_~x~0 29)) (and (<= ULTIMATE.start_main_~x~0 82) .cse33 .cse34 (<= 82 ULTIMATE.start_main_~x~0)) (and (<= 96 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 96) .cse35 .cse36) (and .cse37 (= ULTIMATE.start_main_~x~0 32) .cse38) (and .cse39 .cse40 (= ULTIMATE.start_main_~x~0 15)) (and .cse41 .cse42 (<= ULTIMATE.start_main_~x~0 65) (<= 65 ULTIMATE.start_main_~x~0)) (and .cse43 .cse44 (= ULTIMATE.start_main_~x~0 7)) (and (= ULTIMATE.start_main_~x~0 36) .cse45 .cse46) (and .cse47 (= ULTIMATE.start_main_~x~0 47) .cse48) (and .cse49 (<= 67 ULTIMATE.start_main_~x~0) .cse50 (<= ULTIMATE.start_main_~x~0 67)) (and .cse51 .cse52 (= ULTIMATE.start_main_~x~0 30)) (and .cse22 .cse23 (= ULTIMATE.start_main_~x~0 22)) (and (= ULTIMATE.start_main_~x~0 35) .cse41 .cse42) (and .cse53 (<= ULTIMATE.start_main_~x~0 79) .cse54 (<= 79 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 5) .cse55 .cse56) (and (= ULTIMATE.start_main_~x~0 26) .cse57 .cse58) (and (<= 61 ULTIMATE.start_main_~x~0) .cse59 (<= ULTIMATE.start_main_~x~0 61) .cse60) (and .cse61 (= ULTIMATE.start_main_~x~0 25) .cse62) (and (= ULTIMATE.start_main_~x~0 39) .cse59 .cse60) (and .cse16 .cse17 (<= ULTIMATE.start_main_~x~0 84) (<= 84 ULTIMATE.start_main_~x~0)) (and .cse63 (<= 86 ULTIMATE.start_main_~x~0) .cse64 (<= ULTIMATE.start_main_~x~0 86)) (and .cse6 (= ULTIMATE.start_main_~x~0 37) .cse7) (and .cse65 (= ULTIMATE.start_main_~x~0 11) .cse66) (and .cse67 (<= ULTIMATE.start_main_~x~0 62) .cse68 (<= 62 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 64) (<= 64 ULTIMATE.start_main_~x~0) .cse45 .cse46) (and (<= 68 ULTIMATE.start_main_~x~0) .cse37 (<= ULTIMATE.start_main_~x~0 68) .cse38) (and (<= 81 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 81) .cse69 .cse70) (and .cse71 .cse72 (= ULTIMATE.start_main_~x~0 2)) (and .cse73 .cse74 (= ULTIMATE.start_main_~x~0 12)) (and .cse73 .cse74 (<= 88 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 88)) (and (<= 54 ULTIMATE.start_main_~x~0) .cse8 (<= ULTIMATE.start_main_~x~0 54) .cse9) (and .cse71 .cse72 (<= 98 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 98)) (and (= ULTIMATE.start_main_~x~0 43) .cse75 .cse76) (and (<= ULTIMATE.start_main_~x~0 55) .cse77 .cse78 (<= 55 ULTIMATE.start_main_~x~0)) (and .cse65 (<= 89 ULTIMATE.start_main_~x~0) .cse66 (<= ULTIMATE.start_main_~x~0 89)) (and .cse47 (<= ULTIMATE.start_main_~x~0 53) (<= 53 ULTIMATE.start_main_~x~0) .cse48) (and .cse79 .cse80 (= ULTIMATE.start_main_~x~0 48)) (and (= ULTIMATE.start_main_~x~0 33) .cse49 .cse50) (and (<= 74 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 74) .cse57 .cse58) (and .cse81 (<= ULTIMATE.start_main_~x~0 72) .cse82 (<= 72 ULTIMATE.start_main_~x~0)) (and .cse12 (<= 59 ULTIMATE.start_main_~x~0) .cse13 (<= ULTIMATE.start_main_~x~0 59)) (and (<= ULTIMATE.start_main_~x~0 92) .cse29 (<= 92 ULTIMATE.start_main_~x~0) .cse30) (and .cse77 (= ULTIMATE.start_main_~x~0 45) .cse78) (and .cse83 .cse84 (= ULTIMATE.start_main_~x~0 27)) (and (<= 70 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 70) .cse51 .cse52) (and .cse39 .cse40 (<= ULTIMATE.start_main_~x~0 85) (<= 85 ULTIMATE.start_main_~x~0)) (and .cse27 .cse28 (= 40 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 99) (<= 99 ULTIMATE.start_main_~x~0) .cse85 .cse86) (and (<= ULTIMATE.start_main_~x~0 80) .cse2 .cse3 (<= 80 ULTIMATE.start_main_~x~0)) (and (<= 71 ULTIMATE.start_main_~x~0) .cse31 .cse32 (<= ULTIMATE.start_main_~x~0 71)) (and .cse20 (= ULTIMATE.start_main_~x~0 10) .cse21) (and .cse79 (<= 52 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 52) .cse80) (and .cse87 (= ULTIMATE.start_main_~x~0 17) .cse88) (and .cse89 (= ULTIMATE.start_main_~x~0 34) .cse90) (and (= ULTIMATE.start_main_~x~0 4) .cse35 .cse36) (and (<= ULTIMATE.start_main_~x~0 93) .cse43 .cse44 (<= 93 ULTIMATE.start_main_~x~0)) (and .cse61 (<= 75 ULTIMATE.start_main_~x~0) .cse62 (<= ULTIMATE.start_main_~x~0 75)) (and (= 19 ULTIMATE.start_main_~x~0) .cse69 .cse70) (and (= ULTIMATE.start_main_~x~0 1) .cse85 .cse86) (and .cse67 (= ULTIMATE.start_main_~x~0 38) .cse68) (and .cse63 .cse64 (= ULTIMATE.start_main_~x~0 14)) (and .cse18 (<= 94 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 94) .cse19) (and .cse53 .cse54 (= ULTIMATE.start_main_~x~0 21)) (and .cse91 .cse92 (= ULTIMATE.start_main_~x~0 49)) (and (= 23 ULTIMATE.start_main_~x~0) .cse93 .cse94) (and .cse55 .cse56 (<= 95 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 95)) (and (<= ULTIMATE.start_main_~x~0 69) .cse95 (<= 69 ULTIMATE.start_main_~x~0) .cse96) (and (<= ULTIMATE.start_main_~x~0 91) .cse4 (<= 91 ULTIMATE.start_main_~x~0) .cse5) (and .cse81 .cse82 (= ULTIMATE.start_main_~x~0 28)) (and (= ULTIMATE.start_main_~x~0 3) .cse97 .cse98) (and .cse89 (<= 66 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 66) .cse90) (and .cse26 (< 99 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 100)) (and .cse0 .cse1 (<= ULTIMATE.start_main_~x~0 76) (<= 76 ULTIMATE.start_main_~x~0)) (and .cse93 (<= 77 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 77) .cse94) (and .cse83 (<= 73 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 73) .cse84) (and .cse33 .cse34 (= ULTIMATE.start_main_~x~0 18)) (and .cse97 (<= ULTIMATE.start_main_~x~0 97) .cse98 (<= 97 ULTIMATE.start_main_~x~0)) (and (<= ULTIMATE.start_main_~x~0 50) (<= 50 ULTIMATE.start_main_~y~0) (<= ULTIMATE.start_main_~y~0 50) (<= 50 ULTIMATE.start_main_~x~0)) (and .cse91 (<= ULTIMATE.start_main_~x~0 51) .cse92 (<= 51 ULTIMATE.start_main_~x~0)) (and .cse14 .cse15 (= ULTIMATE.start_main_~x~0 13)) (and .cse87 .cse88 (<= 83 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 83)) (and .cse95 (= ULTIMATE.start_main_~x~0 31) .cse96) (and (<= 57 ULTIMATE.start_main_~x~0) .cse75 .cse76 (<= ULTIMATE.start_main_~x~0 57)))) [2021-08-26 03:49:14,543 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 36) no Hoare annotation was computed. [2021-08-26 03:49:14,543 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-08-26 03:49:14,543 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-08-26 03:49:14,543 INFO L860 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2021-08-26 03:49:14,547 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:49:14,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:49:14 BoogieIcfgContainer [2021-08-26 03:49:14,581 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:49:14,582 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:49:14,582 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:49:14,582 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:49:14,583 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:45:58" (3/4) ... [2021-08-26 03:49:14,585 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:49:14,593 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-26 03:49:14,593 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:49:14,593 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:49:14,593 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:49:14,631 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:49:14,632 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:49:14,633 INFO L168 Benchmark]: Toolchain (without parser) took 196387.30 ms. Allocated memory was 46.1 MB in the beginning and 2.4 GB in the end (delta: 2.4 GB). Free memory was 22.7 MB in the beginning and 2.0 GB in the end (delta: -2.0 GB). Peak memory consumption was 398.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:49:14,633 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 46.1 MB. Free memory was 28.8 MB in the beginning and 28.8 MB in the end (delta: 39.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:49:14,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.48 ms. Allocated memory is still 56.6 MB. Free memory was 42.1 MB in the beginning and 32.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:49:14,634 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.34 ms. Allocated memory is still 56.6 MB. Free memory was 32.5 MB in the beginning and 40.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:49:14,634 INFO L168 Benchmark]: Boogie Preprocessor took 20.97 ms. Allocated memory is still 56.6 MB. Free memory was 40.9 MB in the beginning and 40.0 MB in the end (delta: 893.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:49:14,634 INFO L168 Benchmark]: RCFGBuilder took 285.66 ms. Allocated memory is still 56.6 MB. Free memory was 39.8 MB in the beginning and 28.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:49:14,635 INFO L168 Benchmark]: TraceAbstraction took 195759.92 ms. Allocated memory was 56.6 MB in the beginning and 2.4 GB in the end (delta: 2.4 GB). Free memory was 28.5 MB in the beginning and 2.0 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.1 GB. [2021-08-26 03:49:14,635 INFO L168 Benchmark]: Witness Printer took 49.85 ms. Allocated memory is still 2.4 GB. Free memory was 2.0 GB in the beginning and 2.0 GB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:49:14,637 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 46.1 MB. Free memory was 28.8 MB in the beginning and 28.8 MB in the end (delta: 39.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.48 ms. Allocated memory is still 56.6 MB. Free memory was 42.1 MB in the beginning and 32.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.34 ms. Allocated memory is still 56.6 MB. Free memory was 32.5 MB in the beginning and 40.9 MB in the end (delta: -8.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.97 ms. Allocated memory is still 56.6 MB. Free memory was 40.9 MB in the beginning and 40.0 MB in the end (delta: 893.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 285.66 ms. Allocated memory is still 56.6 MB. Free memory was 39.8 MB in the beginning and 28.9 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 195759.92 ms. Allocated memory was 56.6 MB in the beginning and 2.4 GB in the end (delta: 2.4 GB). Free memory was 28.5 MB in the beginning and 2.0 GB in the end (delta: -2.0 GB). Peak memory consumption was 1.6 GB. Max. memory is 16.1 GB. * Witness Printer took 49.85 ms. Allocated memory is still 2.4 GB. Free memory was 2.0 GB in the beginning and 2.0 GB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 19]: 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, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 195664.6ms, OverallIterations: 51, TraceHistogramMax: 102, EmptinessCheckTime: 49.6ms, AutomataDifference: 24624.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 47259.9ms, InitialAbstractionConstructionTime: 9.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 987 SDtfs, 1492 SDslu, 20603 SDs, 0 SdLazy, 26193 SolverSat, 2170 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9449.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10159 GetRequests, 7669 SyntacticMatches, 2 SemanticMatches, 2488 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59581 ImplicationChecksByTransitivity, 44801.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4186occurred in iteration=50, InterpolantAutomatonStates: 2196, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1830.2ms AutomataMinimizationTime, 51 MinimizatonAttempts, 3770 StatesRemovedByMinimization, 48 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 106 NumberOfFragments, 1160 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1294097411 FormulaSimplificationTreeSizeReduction, 11380.8ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 141278450 FormulaSimplificationTreeSizeReductionInter, 35863.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 918.6ms SsaConstructionTime, 3786.4ms SatisfiabilityAnalysisTime, 61766.9ms InterpolantComputationTime, 15850 NumberOfCodeBlocks, 15847 NumberOfCodeBlocksAsserted, 1415 NumberOfCheckSat, 15751 ConstructedInterpolants, 0 QuantifiedInterpolants, 36654 SizeOfPredicates, 2 NumberOfNonLiveVariables, 19531 ConjunctsInSsa, 1941 ConjunctsInUnsatCore, 99 InterpolantComputations, 3 PerfectInterpolantSequences, 343184/532878 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: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((y <= 24 && 24 <= y) && x == 24) || ((x == 20 && y <= 20) && 20 <= y)) || ((9 <= y && x == 9) && y <= 9)) || (((x <= 63 && y <= 37) && 37 <= y) && 63 <= x)) || ((y <= 46 && x == 46) && 46 <= y)) || ((x == 44 && y <= 44) && 44 <= y)) || ((41 == x && 41 <= y) && y <= 41)) || (((y <= 13 && x <= 87) && 13 <= y) && 87 <= x)) || ((y <= 16 && 16 <= y) && x == 16)) || ((y <= 6 && x == 6) && 6 <= y)) || (((56 <= x && x <= 56) && y <= 44) && 44 <= y)) || (((10 <= y && 90 <= x) && x <= 90) && y <= 10)) || (((y <= 22 && 78 <= x) && 22 <= y) && x <= 78)) || ((y <= 42 && 42 <= y) && x == 42)) || (y == 0 && x == 0)) || (((y <= 42 && 42 <= y) && 58 <= x) && x <= 58)) || (((40 <= y && y <= 40) && x <= 60) && 60 <= x)) || ((x == 8 && 8 <= y) && y <= 8)) || ((29 <= y && y <= 29) && x == 29)) || (((x <= 82 && 18 <= y) && y <= 18) && 82 <= x)) || (((96 <= x && x <= 96) && y <= 4) && 4 <= y)) || ((32 <= y && x == 32) && y <= 32)) || ((15 <= y && y <= 15) && x == 15)) || (((35 <= y && y <= 35) && x <= 65) && 65 <= x)) || ((7 <= y && y <= 7) && x == 7)) || ((x == 36 && 36 <= y) && y <= 36)) || ((47 <= y && x == 47) && y <= 47)) || (((y <= 33 && 67 <= x) && 33 <= y) && x <= 67)) || ((y <= 30 && 30 <= y) && x == 30)) || ((y <= 22 && 22 <= y) && x == 22)) || ((x == 35 && 35 <= y) && y <= 35)) || (((y <= 21 && x <= 79) && 21 <= y) && 79 <= x)) || ((x == 5 && 5 <= y) && y <= 5)) || ((x == 26 && 26 <= y) && y <= 26)) || (((61 <= x && y <= 39) && x <= 61) && 39 <= y)) || ((25 <= y && x == 25) && y <= 25)) || ((x == 39 && y <= 39) && 39 <= y)) || (((y <= 16 && 16 <= y) && x <= 84) && 84 <= x)) || (((y <= 14 && 86 <= x) && 14 <= y) && x <= 86)) || ((y <= 37 && x == 37) && 37 <= y)) || ((11 <= y && x == 11) && y <= 11)) || (((38 <= y && x <= 62) && y <= 38) && 62 <= x)) || (((x <= 64 && 64 <= x) && 36 <= y) && y <= 36)) || (((68 <= x && 32 <= y) && x <= 68) && y <= 32)) || (((81 <= x && x <= 81) && 19 <= y) && y <= 19)) || ((2 <= y && y <= 2) && x == 2)) || ((12 <= y && y <= 12) && x == 12)) || (((12 <= y && y <= 12) && 88 <= x) && x <= 88)) || (((54 <= x && y <= 46) && x <= 54) && 46 <= y)) || (((2 <= y && y <= 2) && 98 <= x) && x <= 98)) || ((x == 43 && 43 <= y) && y <= 43)) || (((x <= 55 && y <= 45) && 45 <= y) && 55 <= x)) || (((11 <= y && 89 <= x) && y <= 11) && x <= 89)) || (((47 <= y && x <= 53) && 53 <= x) && y <= 47)) || ((48 <= y && y <= 48) && x == 48)) || ((x == 33 && y <= 33) && 33 <= y)) || (((74 <= x && x <= 74) && 26 <= y) && y <= 26)) || (((28 <= y && x <= 72) && y <= 28) && 72 <= x)) || (((41 <= y && 59 <= x) && y <= 41) && x <= 59)) || (((x <= 92 && 8 <= y) && 92 <= x) && y <= 8)) || ((y <= 45 && x == 45) && 45 <= y)) || ((27 <= y && y <= 27) && x == 27)) || (((70 <= x && x <= 70) && y <= 30) && 30 <= y)) || (((15 <= y && y <= 15) && x <= 85) && 85 <= x)) || ((40 <= y && y <= 40) && 40 == x)) || (((x <= 99 && 99 <= x) && 1 <= y) && y <= 1)) || (((x <= 80 && y <= 20) && 20 <= y) && 80 <= x)) || (((71 <= x && 29 <= y) && y <= 29) && x <= 71)) || ((10 <= y && x == 10) && y <= 10)) || (((48 <= y && 52 <= x) && x <= 52) && y <= 48)) || ((y <= 17 && x == 17) && 17 <= y)) || ((y <= 34 && x == 34) && 34 <= y)) || ((x == 4 && y <= 4) && 4 <= y)) || (((x <= 93 && 7 <= y) && y <= 7) && 93 <= x)) || (((25 <= y && 75 <= x) && y <= 25) && x <= 75)) || ((19 == x && 19 <= y) && y <= 19)) || ((x == 1 && 1 <= y) && y <= 1)) || ((38 <= y && x == 38) && y <= 38)) || ((y <= 14 && 14 <= y) && x == 14)) || (((y <= 6 && 94 <= x) && x <= 94) && 6 <= y)) || ((y <= 21 && 21 <= y) && x == 21)) || ((y <= 49 && 49 <= y) && x == 49)) || ((23 == x && y <= 23) && 23 <= y)) || (((5 <= y && y <= 5) && 95 <= x) && x <= 95)) || (((x <= 69 && y <= 31) && 69 <= x) && 31 <= y)) || (((x <= 91 && 9 <= y) && 91 <= x) && y <= 9)) || ((28 <= y && y <= 28) && x == 28)) || ((x == 3 && y <= 3) && 3 <= y)) || (((y <= 34 && 66 <= x) && x <= 66) && 34 <= y)) || ((y == 0 && 99 < x) && x <= 100)) || (((y <= 24 && 24 <= y) && x <= 76) && 76 <= x)) || (((y <= 23 && 77 <= x) && x <= 77) && 23 <= y)) || (((27 <= y && 73 <= x) && x <= 73) && y <= 27)) || ((18 <= y && y <= 18) && x == 18)) || (((y <= 3 && x <= 97) && 3 <= y) && 97 <= x)) || (((x <= 50 && 50 <= y) && y <= 50) && 50 <= x)) || (((y <= 49 && x <= 51) && 49 <= y) && 51 <= x)) || ((y <= 13 && 13 <= y) && x == 13)) || (((y <= 17 && 17 <= y) && 83 <= x) && x <= 83)) || ((y <= 31 && x == 31) && 31 <= y)) || (((57 <= x && 43 <= y) && y <= 43) && x <= 57) RESULT: Ultimate proved your program to be correct! [2021-08-26 03:49:14,827 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...