./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test23-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/test23-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7597b1bdd5668cdbfa67e3bc4585b635c0270f49 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:10:21,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:10:21,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:10:22,002 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:10:22,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:10:22,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:10:22,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:10:22,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:10:22,007 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:10:22,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:10:22,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:10:22,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:10:22,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:10:22,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:10:22,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:10:22,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:10:22,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:10:22,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:10:22,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:10:22,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:10:22,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:10:22,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:10:22,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:10:22,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:10:22,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:10:22,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:10:22,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:10:22,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:10:22,022 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:10:22,023 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:10:22,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:10:22,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:10:22,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:10:22,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:10:22,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:10:22,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:10:22,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:10:22,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:10:22,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:10:22,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:10:22,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:10:22,031 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:10:22,052 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:10:22,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:10:22,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:10:22,053 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:10:22,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:10:22,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:10:22,055 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:10:22,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:10:22,055 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:10:22,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:10:22,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:10:22,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:10:22,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:10:22,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:10:22,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:10:22,056 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:10:22,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:10:22,057 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:10:22,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:10:22,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:10:22,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:10:22,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:10:22,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:10:22,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:10:22,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:10:22,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:10:22,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:10:22,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:10:22,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:10:22,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:10:22,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7597b1bdd5668cdbfa67e3bc4585b635c0270f49 [2021-08-26 02:10:22,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:10:22,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:10:22,437 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:10:22,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:10:22,439 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:10:22,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test23-1.c [2021-08-26 02:10:22,488 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f387a44fe/7c2700a02a154e1d8a406b7f9710fed6/FLAG0e42cebd6 [2021-08-26 02:10:22,891 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:10:22,892 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test23-1.c [2021-08-26 02:10:22,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f387a44fe/7c2700a02a154e1d8a406b7f9710fed6/FLAG0e42cebd6 [2021-08-26 02:10:22,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f387a44fe/7c2700a02a154e1d8a406b7f9710fed6 [2021-08-26 02:10:22,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:10:22,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:10:22,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:10:22,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:10:22,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:10:22,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:10:22" (1/1) ... [2021-08-26 02:10:22,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e51405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:22, skipping insertion in model container [2021-08-26 02:10:22,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:10:22" (1/1) ... [2021-08-26 02:10:22,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:10:22,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:10:23,055 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/ldv-regression/test23-1.c[1075,1088] [2021-08-26 02:10:23,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:10:23,097 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:10:23,128 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/ldv-regression/test23-1.c[1075,1088] [2021-08-26 02:10:23,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:10:23,141 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:10:23,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23 WrapperNode [2021-08-26 02:10:23,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:10:23,145 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:10:23,145 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:10:23,145 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:10:23,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:10:23,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:10:23,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:10:23,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:10:23,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:10:23,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:10:23,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:10:23,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:10:23,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (1/1) ... [2021-08-26 02:10:23,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:10:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:23,271 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 02:10:23,313 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 02:10:23,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:10:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:10:23,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:10:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:10:23,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:10:23,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:10:23,666 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:10:23,666 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-08-26 02:10:23,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:10:23 BoogieIcfgContainer [2021-08-26 02:10:23,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:10:23,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:10:23,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:10:23,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:10:23,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:10:22" (1/3) ... [2021-08-26 02:10:23,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dcf8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:10:23, skipping insertion in model container [2021-08-26 02:10:23,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:10:23" (2/3) ... [2021-08-26 02:10:23,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dcf8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:10:23, skipping insertion in model container [2021-08-26 02:10:23,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:10:23" (3/3) ... [2021-08-26 02:10:23,676 INFO L111 eAbstractionObserver]: Analyzing ICFG test23-1.c [2021-08-26 02:10:23,679 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:10:23,680 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 02:10:23,726 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:10:23,733 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 02:10:23,734 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 02:10:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 02:10:23,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:23,751 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:23,751 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:23,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2100293056, now seen corresponding path program 1 times [2021-08-26 02:10:23,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:23,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679760154] [2021-08-26 02:10:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:23,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:23,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:23,898 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 02:10:23,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:23,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679760154] [2021-08-26 02:10:23,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679760154] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:10:23,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:10:23,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:10:23,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901667358] [2021-08-26 02:10:23,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:10:23,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:10:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:10:23,914 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 02:10:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:23,924 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-08-26 02:10:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:10:23,925 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 02:10:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:23,930 INFO L225 Difference]: With dead ends: 30 [2021-08-26 02:10:23,930 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 02:10:23,932 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 02:10:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 02:10:23,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-26 02:10:23,960 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 02:10:23,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-26 02:10:23,962 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2021-08-26 02:10:23,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:23,963 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-26 02:10:23,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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 02:10:23,963 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-26 02:10:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 02:10:23,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:23,963 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:23,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:10:23,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:23,967 INFO L82 PathProgramCache]: Analyzing trace with hash 478567452, now seen corresponding path program 1 times [2021-08-26 02:10:23,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:23,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113674658] [2021-08-26 02:10:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:23,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:24,318 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 02:10:24,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:24,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113674658] [2021-08-26 02:10:24,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113674658] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:10:24,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:10:24,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-26 02:10:24,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211304229] [2021-08-26 02:10:24,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:10:24,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:24,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:10:24,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:10:24,326 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 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 02:10:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:24,658 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2021-08-26 02:10:24,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 02:10:24,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 02:10:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:24,661 INFO L225 Difference]: With dead ends: 59 [2021-08-26 02:10:24,661 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 02:10:24,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:10:24,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 02:10:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 25. [2021-08-26 02:10:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-26 02:10:24,674 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-26 02:10:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:24,675 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-26 02:10:24,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 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 02:10:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-26 02:10:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 02:10:24,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:24,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:24,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:10:24,678 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash -108238562, now seen corresponding path program 1 times [2021-08-26 02:10:24,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:24,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645855250] [2021-08-26 02:10:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:24,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:24,774 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 02:10:24,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:24,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645855250] [2021-08-26 02:10:24,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645855250] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:10:24,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:10:24,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-26 02:10:24,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310016374] [2021-08-26 02:10:24,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 02:10:24,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 02:10:24,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-26 02:10:24,780 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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 02:10:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:24,921 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-08-26 02:10:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 02:10:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 02:10:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:24,922 INFO L225 Difference]: With dead ends: 54 [2021-08-26 02:10:24,922 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 02:10:24,922 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:10:24,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 02:10:24,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 25. [2021-08-26 02:10:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 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 02:10:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-08-26 02:10:24,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2021-08-26 02:10:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:24,926 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-08-26 02:10:24,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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 02:10:24,926 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-08-26 02:10:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 02:10:24,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:24,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:24,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:10:24,927 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash -501265572, now seen corresponding path program 1 times [2021-08-26 02:10:24,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:24,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107103479] [2021-08-26 02:10:24,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:24,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:25,062 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 02:10:25,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:25,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107103479] [2021-08-26 02:10:25,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107103479] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:10:25,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:10:25,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-26 02:10:25,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080149078] [2021-08-26 02:10:25,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:10:25,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:25,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:10:25,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:10:25,065 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 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 02:10:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:25,251 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-08-26 02:10:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 02:10:25,252 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-26 02:10:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:25,252 INFO L225 Difference]: With dead ends: 51 [2021-08-26 02:10:25,252 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 02:10:25,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-26 02:10:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 02:10:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 22. [2021-08-26 02:10:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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 02:10:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-26 02:10:25,256 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2021-08-26 02:10:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:25,256 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-26 02:10:25,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 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 02:10:25,256 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-08-26 02:10:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 02:10:25,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:25,257 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:25,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 02:10:25,257 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:25,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:25,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1851619425, now seen corresponding path program 1 times [2021-08-26 02:10:25,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:25,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529332442] [2021-08-26 02:10:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:25,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:25,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:25,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529332442] [2021-08-26 02:10:25,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529332442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:25,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179239555] [2021-08-26 02:10:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:25,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:25,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:25,473 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 02:10:25,476 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 02:10:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:25,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 02:10:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:25,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2021-08-26 02:10:26,212 INFO L354 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2021-08-26 02:10:26,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 41 [2021-08-26 02:10:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:26,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179239555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:26,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:26,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-08-26 02:10:26,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317560792] [2021-08-26 02:10:26,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 02:10:26,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 02:10:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-26 02:10:26,235 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:26,964 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-08-26 02:10:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 02:10:26,964 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 02:10:26,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:26,965 INFO L225 Difference]: With dead ends: 57 [2021-08-26 02:10:26,965 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 02:10:26,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 796.2ms TimeCoverageRelationStatistics Valid=276, Invalid=1056, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 02:10:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 02:10:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 24. [2021-08-26 02:10:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-26 02:10:26,969 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-08-26 02:10:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:26,969 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-26 02:10:26,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-26 02:10:26,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 02:10:26,970 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:26,970 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:27,009 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 02:10:27,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:27,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:27,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1495361690, now seen corresponding path program 2 times [2021-08-26 02:10:27,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:27,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547994855] [2021-08-26 02:10:27,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:27,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:27,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:27,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547994855] [2021-08-26 02:10:27,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547994855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:27,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75866962] [2021-08-26 02:10:27,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:10:27,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:27,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:27,406 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 02:10:27,437 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 02:10:27,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:10:27,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:27,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 02:10:27,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:27,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2021-08-26 02:10:28,280 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-08-26 02:10:28,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 52 [2021-08-26 02:10:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:28,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75866962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:28,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:28,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-26 02:10:28,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142770315] [2021-08-26 02:10:28,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 02:10:28,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:28,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 02:10:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:10:28,291 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 02:10:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:29,067 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-08-26 02:10:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-26 02:10:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 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 20 [2021-08-26 02:10:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:29,068 INFO L225 Difference]: With dead ends: 63 [2021-08-26 02:10:29,068 INFO L226 Difference]: Without dead ends: 58 [2021-08-26 02:10:29,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 902.4ms TimeCoverageRelationStatistics Valid=419, Invalid=1561, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 02:10:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-26 02:10:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 26. [2021-08-26 02:10:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-26 02:10:29,072 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 20 [2021-08-26 02:10:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:29,072 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-26 02:10:29,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 02:10:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-26 02:10:29,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 02:10:29,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:29,072 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:29,113 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 02:10:29,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-26 02:10:29,273 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1013708501, now seen corresponding path program 3 times [2021-08-26 02:10:29,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:29,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712393771] [2021-08-26 02:10:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:29,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:29,432 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:29,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:29,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712393771] [2021-08-26 02:10:29,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712393771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:29,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664093836] [2021-08-26 02:10:29,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:10:29,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:29,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:29,434 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 02:10:29,435 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 02:10:29,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 02:10:29,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 02:10:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:29,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2021-08-26 02:10:30,080 INFO L354 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2021-08-26 02:10:30,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 38 [2021-08-26 02:10:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:30,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664093836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:30,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:30,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-08-26 02:10:30,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480217371] [2021-08-26 02:10:30,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 02:10:30,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 02:10:30,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-08-26 02:10:30,113 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 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 02:10:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:31,559 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-08-26 02:10:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 02:10:31,560 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 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) Word has length 22 [2021-08-26 02:10:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:31,562 INFO L225 Difference]: With dead ends: 69 [2021-08-26 02:10:31,562 INFO L226 Difference]: Without dead ends: 64 [2021-08-26 02:10:31,565 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1446.5ms TimeCoverageRelationStatistics Valid=604, Invalid=2258, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 02:10:31,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-26 02:10:31,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 28. [2021-08-26 02:10:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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 02:10:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-26 02:10:31,578 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2021-08-26 02:10:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:31,579 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-26 02:10:31,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 25 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 02:10:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-26 02:10:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 02:10:31,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:31,580 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:31,598 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 02:10:31,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:31,797 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:31,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:31,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2001461840, now seen corresponding path program 4 times [2021-08-26 02:10:31,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:31,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799444585] [2021-08-26 02:10:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:31,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:31,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:31,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799444585] [2021-08-26 02:10:31,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799444585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:31,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878900143] [2021-08-26 02:10:31,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:10:31,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:31,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:31,986 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 02:10:31,988 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 02:10:32,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:10:32,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 02:10:32,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:32,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2021-08-26 02:10:32,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-26 02:10:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:32,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878900143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:32,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:32,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 17 [2021-08-26 02:10:32,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435458062] [2021-08-26 02:10:32,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 02:10:32,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:32,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 02:10:32,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:10:32,250 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 02:10:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:33,067 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2021-08-26 02:10:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-26 02:10:33,068 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 24 [2021-08-26 02:10:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:33,069 INFO L225 Difference]: With dead ends: 75 [2021-08-26 02:10:33,069 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 02:10:33,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 841.5ms TimeCoverageRelationStatistics Valid=625, Invalid=1925, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 02:10:33,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 02:10:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 30. [2021-08-26 02:10:33,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states 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 02:10:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-08-26 02:10:33,074 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2021-08-26 02:10:33,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:33,075 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-08-26 02:10:33,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 02:10:33,075 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-08-26 02:10:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 02:10:33,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:33,076 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:33,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:33,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:33,298 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:33,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:33,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2044648203, now seen corresponding path program 5 times [2021-08-26 02:10:33,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:33,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972007213] [2021-08-26 02:10:33,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:33,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:33,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:33,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972007213] [2021-08-26 02:10:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972007213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:33,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27542886] [2021-08-26 02:10:33,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 02:10:33,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:33,505 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 02:10:33,506 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 02:10:33,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 02:10:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-26 02:10:33,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:33,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-26 02:10:34,090 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-08-26 02:10:34,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 17 [2021-08-26 02:10:34,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:34,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27542886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:34,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:34,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-08-26 02:10:34,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140586641] [2021-08-26 02:10:34,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 02:10:34,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:34,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 02:10:34,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:10:34,104 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:35,504 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-08-26 02:10:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-26 02:10:35,505 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-26 02:10:35,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:35,506 INFO L225 Difference]: With dead ends: 81 [2021-08-26 02:10:35,506 INFO L226 Difference]: Without dead ends: 76 [2021-08-26 02:10:35,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 1510.2ms TimeCoverageRelationStatistics Valid=929, Invalid=2977, Unknown=0, NotChecked=0, Total=3906 [2021-08-26 02:10:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-26 02:10:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 32. [2021-08-26 02:10:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 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 02:10:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-08-26 02:10:35,520 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2021-08-26 02:10:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:35,521 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-08-26 02:10:35,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:35,521 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-08-26 02:10:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 02:10:35,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:35,523 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:35,549 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 02:10:35,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:35,746 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:35,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:35,747 INFO L82 PathProgramCache]: Analyzing trace with hash -597070086, now seen corresponding path program 6 times [2021-08-26 02:10:35,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:35,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32882140] [2021-08-26 02:10:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:35,747 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:35,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:35,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32882140] [2021-08-26 02:10:35,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32882140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:35,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311327109] [2021-08-26 02:10:35,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 02:10:35,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:35,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:35,983 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 02:10:35,984 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 02:10:36,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 02:10:36,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:36,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 02:10:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:36,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2021-08-26 02:10:36,921 INFO L354 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2021-08-26 02:10:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 38 [2021-08-26 02:10:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:36,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311327109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:36,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:36,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-08-26 02:10:36,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331054363] [2021-08-26 02:10:36,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-26 02:10:36,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-26 02:10:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:10:36,956 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 02:10:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:39,121 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-08-26 02:10:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 02:10:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 02:10:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:39,122 INFO L225 Difference]: With dead ends: 87 [2021-08-26 02:10:39,122 INFO L226 Difference]: Without dead ends: 82 [2021-08-26 02:10:39,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1627 ImplicationChecksByTransitivity, 2360.7ms TimeCoverageRelationStatistics Valid=1318, Invalid=4688, Unknown=0, NotChecked=0, Total=6006 [2021-08-26 02:10:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-26 02:10:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 34. [2021-08-26 02:10:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 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 02:10:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-08-26 02:10:39,127 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2021-08-26 02:10:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:39,127 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-08-26 02:10:39,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 02:10:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-08-26 02:10:39,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 02:10:39,128 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:39,128 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:39,148 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 02:10:39,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:39,341 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:39,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1043903553, now seen corresponding path program 7 times [2021-08-26 02:10:39,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:39,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922134744] [2021-08-26 02:10:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:39,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:39,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:39,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922134744] [2021-08-26 02:10:39,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922134744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:39,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941815574] [2021-08-26 02:10:39,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 02:10:39,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:39,599 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 02:10:39,600 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 02:10:39,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:39,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 02:10:39,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:39,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2021-08-26 02:10:40,806 INFO L354 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2021-08-26 02:10:40,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 41 [2021-08-26 02:10:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:40,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941815574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:40,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:40,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2021-08-26 02:10:40,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305596717] [2021-08-26 02:10:40,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-26 02:10:40,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-26 02:10:40,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 02:10:40,833 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 02:10:43,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:43,446 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-08-26 02:10:43,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-26 02:10:43,447 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 30 [2021-08-26 02:10:43,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:43,447 INFO L225 Difference]: With dead ends: 93 [2021-08-26 02:10:43,447 INFO L226 Difference]: Without dead ends: 88 [2021-08-26 02:10:43,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 2712.3ms TimeCoverageRelationStatistics Valid=1599, Invalid=5541, Unknown=0, NotChecked=0, Total=7140 [2021-08-26 02:10:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-26 02:10:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 36. [2021-08-26 02:10:43,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-08-26 02:10:43,454 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2021-08-26 02:10:43,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:43,454 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-08-26 02:10:43,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 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 02:10:43,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-08-26 02:10:43,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 02:10:43,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:43,455 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:43,498 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 02:10:43,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:43,674 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:43,675 INFO L82 PathProgramCache]: Analyzing trace with hash -954135740, now seen corresponding path program 8 times [2021-08-26 02:10:43,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:43,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073807753] [2021-08-26 02:10:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:43,675 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:43,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:43,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073807753] [2021-08-26 02:10:43,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073807753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:43,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670463861] [2021-08-26 02:10:43,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 02:10:43,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:43,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:43,943 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 02:10:43,944 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 02:10:44,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 02:10:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 02:10:44,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:44,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2021-08-26 02:10:45,465 INFO L354 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2021-08-26 02:10:45,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 41 [2021-08-26 02:10:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:45,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670463861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:45,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:45,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-08-26 02:10:45,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144152077] [2021-08-26 02:10:45,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 02:10:45,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:45,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 02:10:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 02:10:45,480 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:48,546 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2021-08-26 02:10:48,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-26 02:10:48,547 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-26 02:10:48,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:48,548 INFO L225 Difference]: With dead ends: 99 [2021-08-26 02:10:48,548 INFO L226 Difference]: Without dead ends: 94 [2021-08-26 02:10:48,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2474 ImplicationChecksByTransitivity, 3264.3ms TimeCoverageRelationStatistics Valid=1928, Invalid=6628, Unknown=0, NotChecked=0, Total=8556 [2021-08-26 02:10:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-26 02:10:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 38. [2021-08-26 02:10:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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 02:10:48,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-08-26 02:10:48,554 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 32 [2021-08-26 02:10:48,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:48,554 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-08-26 02:10:48,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:48,554 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-08-26 02:10:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 02:10:48,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:48,555 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:48,573 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 02:10:48,773 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,SelfDestructingSolverStorable11 [2021-08-26 02:10:48,774 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:48,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:48,774 INFO L82 PathProgramCache]: Analyzing trace with hash -586613367, now seen corresponding path program 9 times [2021-08-26 02:10:48,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:48,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012165415] [2021-08-26 02:10:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:48,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:48,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:49,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:49,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012165415] [2021-08-26 02:10:49,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012165415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:49,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194419407] [2021-08-26 02:10:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 02:10:49,094 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:49,095 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 02:10:49,096 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 02:10:49,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-26 02:10:49,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:49,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 02:10:49,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:49,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 76 [2021-08-26 02:10:50,919 INFO L354 Elim1Store]: treesize reduction 19, result has 13.6 percent of original size [2021-08-26 02:10:50,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 41 [2021-08-26 02:10:50,954 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:50,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194419407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:50,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:50,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-08-26 02:10:50,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722917140] [2021-08-26 02:10:50,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 02:10:50,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:50,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 02:10:50,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1219, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 02:10:50,958 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:54,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:54,511 INFO L93 Difference]: Finished difference Result 103 states and 106 transitions. [2021-08-26 02:10:54,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-26 02:10:54,512 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 02:10:54,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:54,512 INFO L225 Difference]: With dead ends: 103 [2021-08-26 02:10:54,512 INFO L226 Difference]: Without dead ends: 98 [2021-08-26 02:10:54,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 4062.5ms TimeCoverageRelationStatistics Valid=1602, Invalid=5040, Unknown=0, NotChecked=0, Total=6642 [2021-08-26 02:10:54,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-26 02:10:54,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 43. [2021-08-26 02:10:54,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:54,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-08-26 02:10:54,522 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 34 [2021-08-26 02:10:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:54,522 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-08-26 02:10:54,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-08-26 02:10:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 02:10:54,523 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:54,523 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:54,552 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 02:10:54,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-26 02:10:54,724 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:54,724 INFO L82 PathProgramCache]: Analyzing trace with hash -394486583, now seen corresponding path program 1 times [2021-08-26 02:10:54,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:54,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805739634] [2021-08-26 02:10:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:54,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:55,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:55,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805739634] [2021-08-26 02:10:55,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805739634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:55,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604813056] [2021-08-26 02:10:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:55,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:55,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:55,093 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 02:10:55,098 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 02:10:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:55,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 02:10:55,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:55,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-26 02:10:56,208 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-08-26 02:10:56,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 17 [2021-08-26 02:10:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:56,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604813056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:56,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:56,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 31 [2021-08-26 02:10:56,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655399961] [2021-08-26 02:10:56,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-26 02:10:56,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:56,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-26 02:10:56,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-08-26 02:10:56,252 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 02:10:57,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:10:57,977 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2021-08-26 02:10:57,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 02:10:57,978 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 34 [2021-08-26 02:10:57,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:10:57,978 INFO L225 Difference]: With dead ends: 105 [2021-08-26 02:10:57,978 INFO L226 Difference]: Without dead ends: 100 [2021-08-26 02:10:57,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 2065.0ms TimeCoverageRelationStatistics Valid=752, Invalid=2218, Unknown=0, NotChecked=0, Total=2970 [2021-08-26 02:10:57,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-26 02:10:57,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 40. [2021-08-26 02:10:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:10:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-08-26 02:10:57,991 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2021-08-26 02:10:57,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:10:57,991 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-08-26 02:10:57,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 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 02:10:57,991 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-08-26 02:10:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 02:10:57,992 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:10:57,992 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:10:58,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 02:10:58,216 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,SelfDestructingSolverStorable13 [2021-08-26 02:10:58,216 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:10:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:10:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash 415068814, now seen corresponding path program 10 times [2021-08-26 02:10:58,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:10:58,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56088750] [2021-08-26 02:10:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:10:58,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:10:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:10:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:58,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:10:58,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56088750] [2021-08-26 02:10:58,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56088750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:58,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811750727] [2021-08-26 02:10:58,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 02:10:58,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:10:58,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:10:58,604 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 02:10:58,605 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 02:10:59,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 02:10:59,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 02:10:59,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 02:10:59,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:10:59,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2021-08-26 02:10:59,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-26 02:10:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:10:59,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811750727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:10:59,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:10:59,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 23 [2021-08-26 02:10:59,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992412279] [2021-08-26 02:10:59,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 02:10:59,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:10:59,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 02:10:59,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-08-26 02:10:59,211 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 02:11:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:11:01,705 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-08-26 02:11:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-26 02:11:01,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 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 36 [2021-08-26 02:11:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:11:01,707 INFO L225 Difference]: With dead ends: 111 [2021-08-26 02:11:01,707 INFO L226 Difference]: Without dead ends: 106 [2021-08-26 02:11:01,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 2564.8ms TimeCoverageRelationStatistics Valid=2128, Invalid=6428, Unknown=0, NotChecked=0, Total=8556 [2021-08-26 02:11:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-26 02:11:01,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 42. [2021-08-26 02:11:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:11:01,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-08-26 02:11:01,721 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 36 [2021-08-26 02:11:01,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:11:01,722 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-08-26 02:11:01,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states 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 02:11:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-08-26 02:11:01,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 02:11:01,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:11:01,723 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:11:01,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-26 02:11:01,947 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,SelfDestructingSolverStorable14 [2021-08-26 02:11:01,947 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:11:01,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:11:01,948 INFO L82 PathProgramCache]: Analyzing trace with hash 958970451, now seen corresponding path program 11 times [2021-08-26 02:11:01,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:11:01,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791364141] [2021-08-26 02:11:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:11:01,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:11:01,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:11:01,981 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 02:11:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 02:11:02,054 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 02:11:02,054 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 02:11:02,055 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:11:02,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-26 02:11:02,061 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:11:02,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:11:02 BoogieIcfgContainer [2021-08-26 02:11:02,149 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:11:02,149 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:11:02,150 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:11:02,150 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:11:02,150 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:10:23" (3/4) ... [2021-08-26 02:11:02,151 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 02:11:02,225 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 02:11:02,225 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:11:02,225 INFO L168 Benchmark]: Toolchain (without parser) took 39310.95 ms. Allocated memory was 60.8 MB in the beginning and 406.8 MB in the end (delta: 346.0 MB). Free memory was 40.0 MB in the beginning and 329.0 MB in the end (delta: -289.0 MB). Peak memory consumption was 55.3 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:02,226 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 43.1 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:11:02,226 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.45 ms. Allocated memory is still 60.8 MB. Free memory was 39.8 MB in the beginning and 43.8 MB in the end (delta: -4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:02,226 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.14 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 42.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:02,226 INFO L168 Benchmark]: Boogie Preprocessor took 35.12 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 40.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:02,226 INFO L168 Benchmark]: RCFGBuilder took 445.77 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 40.6 MB in the beginning and 61.8 MB in the end (delta: -21.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:02,227 INFO L168 Benchmark]: TraceAbstraction took 38478.07 ms. Allocated memory was 83.9 MB in the beginning and 406.8 MB in the end (delta: 323.0 MB). Free memory was 61.5 MB in the beginning and 333.2 MB in the end (delta: -271.7 MB). Peak memory consumption was 52.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:02,227 INFO L168 Benchmark]: Witness Printer took 75.37 ms. Allocated memory is still 406.8 MB. Free memory was 333.2 MB in the beginning and 329.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:11:02,228 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 60.8 MB. Free memory was 43.2 MB in the beginning and 43.1 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 228.45 ms. Allocated memory is still 60.8 MB. Free memory was 39.8 MB in the beginning and 43.8 MB in the end (delta: -4.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.14 ms. Allocated memory is still 60.8 MB. Free memory was 43.7 MB in the beginning and 42.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.12 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 40.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 445.77 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 40.6 MB in the beginning and 61.8 MB in the end (delta: -21.2 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 38478.07 ms. Allocated memory was 83.9 MB in the beginning and 406.8 MB in the end (delta: 323.0 MB). Free memory was 61.5 MB in the beginning and 333.2 MB in the end (delta: -271.7 MB). Peak memory consumption was 52.6 MB. Max. memory is 16.1 GB. * Witness Printer took 75.37 ms. Allocated memory is still 406.8 MB. Free memory was 333.2 MB in the beginning and 329.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 52]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] struct dummy d1, d2; VAL [d1={6:0}, d2={7:0}] [L16] d1.a = __VERIFIER_nondet_int() [L17] d1.b = __VERIFIER_nondet_int() [L19] d2.a = __VERIFIER_nondet_int() [L20] d2.b = __VERIFIER_nondet_int() [L25] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={6:0}, d2={7:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L25] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [d1={6:0}, d2={7:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L37] int i = __VERIFIER_nondet_int(); [L38] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L39] pd2->array[i] = i [L40] int *pa = &pd1->array[i]; [L41] EXPR pd2->array[i] [L41] i = pd2->array[i] - 10 [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={6:0}, d2={7:0}] [L42] EXPR \read(*pa) VAL [d1={6:0}, d2={7:0}] [L42] COND FALSE !(i <= *pa) [L30] EXPR s1->array[i] [L30] return s1->array[i] == i; [L45] COND TRUE !check(pd2, i) [L52] reach_error() VAL [d1={6:0}, d2={7:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 38334.9ms, OverallIterations: 16, TraceHistogramMax: 12, EmptinessCheckTime: 15.2ms, AutomataDifference: 21512.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 197 SDtfs, 2173 SDslu, 1446 SDs, 0 SdLazy, 2628 SolverSat, 881 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2408.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 977 GetRequests, 213 SyntacticMatches, 4 SemanticMatches, 760 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13918 ImplicationChecksByTransitivity, 23038.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=13, InterpolantAutomatonStates: 537, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 109.6ms AutomataMinimizationTime, 15 MinimizatonAttempts, 587 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 177.2ms SsaConstructionTime, 585.9ms SatisfiabilityAnalysisTime, 11172.1ms InterpolantComputationTime, 709 NumberOfCodeBlocks, 697 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 645 ConstructedInterpolants, 83 QuantifiedInterpolants, 10757 SizeOfPredicates, 111 NumberOfNonLiveVariables, 1518 ConjunctsInSsa, 383 ConjunctsInUnsatCore, 26 InterpolantComputations, 4 PerfectInterpolantSequences, 0/1060 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 02:11:02,287 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...