./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_15x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 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/recursive-simple/sum_15x0-1.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 d450838eb5360c0781a4b04de09325400364ec08 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 23:12:14,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 23:12:14,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 23:12:15,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 23:12:15,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 23:12:15,016 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 23:12:15,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 23:12:15,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 23:12:15,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 23:12:15,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 23:12:15,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 23:12:15,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 23:12:15,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 23:12:15,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 23:12:15,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 23:12:15,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 23:12:15,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 23:12:15,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 23:12:15,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 23:12:15,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 23:12:15,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 23:12:15,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 23:12:15,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 23:12:15,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 23:12:15,047 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 23:12:15,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 23:12:15,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 23:12:15,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 23:12:15,051 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 23:12:15,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 23:12:15,054 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 23:12:15,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 23:12:15,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 23:12:15,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 23:12:15,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 23:12:15,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 23:12:15,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 23:12:15,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 23:12:15,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 23:12:15,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 23:12:15,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 23:12:15,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 23:12:15,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 23:12:15,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 23:12:15,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 23:12:15,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 23:12:15,109 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 23:12:15,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 23:12:15,109 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 23:12:15,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 23:12:15,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 23:12:15,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 23:12:15,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 23:12:15,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 23:12:15,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 23:12:15,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 23:12:15,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 23:12:15,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 23:12:15,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 23:12:15,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 23:12:15,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 23:12:15,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 23:12:15,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 23:12:15,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:12:15,112 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 23:12:15,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 23:12:15,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 23:12:15,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 23:12:15,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 23:12:15,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 23:12:15,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 23:12:15,114 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450838eb5360c0781a4b04de09325400364ec08 [2020-10-25 23:12:15,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 23:12:15,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 23:12:15,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 23:12:15,574 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 23:12:15,576 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 23:12:15,577 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2020-10-25 23:12:15,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000d5ad98/1591395caae8452d97214b5f053db596/FLAGbd88dd725 [2020-10-25 23:12:16,188 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 23:12:16,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_15x0-1.c [2020-10-25 23:12:16,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000d5ad98/1591395caae8452d97214b5f053db596/FLAGbd88dd725 [2020-10-25 23:12:16,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/000d5ad98/1591395caae8452d97214b5f053db596 [2020-10-25 23:12:16,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 23:12:16,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 23:12:16,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 23:12:16,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 23:12:16,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 23:12:16,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@775d84c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16, skipping insertion in model container [2020-10-25 23:12:16,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 23:12:16,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 23:12:16,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:12:16,863 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 23:12:16,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:12:16,895 INFO L208 MainTranslator]: Completed translation [2020-10-25 23:12:16,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16 WrapperNode [2020-10-25 23:12:16,896 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 23:12:16,897 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 23:12:16,897 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 23:12:16,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 23:12:16,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 23:12:16,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 23:12:16,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 23:12:16,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 23:12:16,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... [2020-10-25 23:12:16,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 23:12:16,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 23:12:16,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 23:12:16,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 23:12:16,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:12:17,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 23:12:17,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 23:12:17,030 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-10-25 23:12:17,031 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-10-25 23:12:17,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 23:12:17,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 23:12:17,228 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 23:12:17,228 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-25 23:12:17,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:17 BoogieIcfgContainer [2020-10-25 23:12:17,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 23:12:17,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 23:12:17,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 23:12:17,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 23:12:17,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 11:12:16" (1/3) ... [2020-10-25 23:12:17,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534c1fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:12:17, skipping insertion in model container [2020-10-25 23:12:17,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:12:16" (2/3) ... [2020-10-25 23:12:17,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534c1fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:12:17, skipping insertion in model container [2020-10-25 23:12:17,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:17" (3/3) ... [2020-10-25 23:12:17,239 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-10-25 23:12:17,251 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 23:12:17,256 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 23:12:17,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 23:12:17,298 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 23:12:17,298 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 23:12:17,298 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 23:12:17,299 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 23:12:17,299 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 23:12:17,299 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 23:12:17,299 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 23:12:17,299 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 23:12:17,317 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 23:12:17,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 23:12:17,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:17,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:17,325 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:17,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:17,333 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-10-25 23:12:17,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:17,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572861707] [2020-10-25 23:12:17,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 23:12:17,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572861707] [2020-10-25 23:12:17,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:12:17,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-25 23:12:17,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834223088] [2020-10-25 23:12:17,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 23:12:17,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 23:12:17,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 23:12:17,694 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-10-25 23:12:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:17,779 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-25 23:12:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 23:12:17,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-25 23:12:17,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:17,791 INFO L225 Difference]: With dead ends: 26 [2020-10-25 23:12:17,792 INFO L226 Difference]: Without dead ends: 15 [2020-10-25 23:12:17,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-25 23:12:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-25 23:12:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-25 23:12:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-25 23:12:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-25 23:12:17,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-10-25 23:12:17,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:17,842 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-25 23:12:17,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 23:12:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-25 23:12:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-25 23:12:17,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:17,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:17,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 23:12:17,845 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:17,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:17,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-10-25 23:12:17,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:17,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956496817] [2020-10-25 23:12:17,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 23:12:17,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956496817] [2020-10-25 23:12:17,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476562571] [2020-10-25 23:12:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 23:12:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-25 23:12:18,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:18,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-25 23:12:18,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730721190] [2020-10-25 23:12:18,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 23:12:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:18,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 23:12:18,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-25 23:12:18,125 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-10-25 23:12:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:18,237 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-10-25 23:12:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 23:12:18,239 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-25 23:12:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:18,240 INFO L225 Difference]: With dead ends: 22 [2020-10-25 23:12:18,240 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 23:12:18,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-25 23:12:18,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 23:12:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-25 23:12:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 23:12:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-10-25 23:12:18,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-10-25 23:12:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:18,252 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-10-25 23:12:18,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 23:12:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-10-25 23:12:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-25 23:12:18,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:18,254 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:18,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 23:12:18,471 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-10-25 23:12:18,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:18,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205092306] [2020-10-25 23:12:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:18,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 23:12:18,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205092306] [2020-10-25 23:12:18,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472082331] [2020-10-25 23:12:18,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:18,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:12:18,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:18,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 23:12:18,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-25 23:12:18,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:18,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-25 23:12:18,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677276503] [2020-10-25 23:12:18,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-25 23:12:18,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:18,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-25 23:12:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-25 23:12:18,771 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-10-25 23:12:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:18,875 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-10-25 23:12:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 23:12:18,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-25 23:12:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:18,877 INFO L225 Difference]: With dead ends: 25 [2020-10-25 23:12:18,877 INFO L226 Difference]: Without dead ends: 21 [2020-10-25 23:12:18,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-25 23:12:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-25 23:12:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-25 23:12:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-25 23:12:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-25 23:12:18,884 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-10-25 23:12:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:18,884 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-25 23:12:18,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-25 23:12:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-25 23:12:18,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-25 23:12:18,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:18,886 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:19,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:19,087 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-10-25 23:12:19,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:19,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499866836] [2020-10-25 23:12:19,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-25 23:12:19,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499866836] [2020-10-25 23:12:19,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992018648] [2020-10-25 23:12:19,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:19,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-25 23:12:19,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:19,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-25 23:12:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-25 23:12:19,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:19,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-25 23:12:19,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461284291] [2020-10-25 23:12:19,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 23:12:19,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:19,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 23:12:19,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-25 23:12:19,360 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-10-25 23:12:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:19,442 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-10-25 23:12:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 23:12:19,442 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-25 23:12:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:19,443 INFO L225 Difference]: With dead ends: 28 [2020-10-25 23:12:19,443 INFO L226 Difference]: Without dead ends: 24 [2020-10-25 23:12:19,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-25 23:12:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-25 23:12:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-25 23:12:19,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-25 23:12:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-10-25 23:12:19,450 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-10-25 23:12:19,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:19,450 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-10-25 23:12:19,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 23:12:19,450 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-10-25 23:12:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-25 23:12:19,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:19,452 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:19,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:19,665 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-10-25 23:12:19,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:19,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067548261] [2020-10-25 23:12:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:19,810 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-25 23:12:19,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067548261] [2020-10-25 23:12:19,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068092116] [2020-10-25 23:12:19,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:19,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 23:12:19,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:19,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-25 23:12:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-25 23:12:19,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:19,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-25 23:12:19,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049268781] [2020-10-25 23:12:19,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-25 23:12:19,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:19,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-25 23:12:19,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-25 23:12:19,917 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-10-25 23:12:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:19,998 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-25 23:12:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-25 23:12:19,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-25 23:12:19,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:19,999 INFO L225 Difference]: With dead ends: 31 [2020-10-25 23:12:19,999 INFO L226 Difference]: Without dead ends: 27 [2020-10-25 23:12:20,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-25 23:12:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-25 23:12:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-25 23:12:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-25 23:12:20,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-25 23:12:20,006 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-10-25 23:12:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:20,006 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-25 23:12:20,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-25 23:12:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-25 23:12:20,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-25 23:12:20,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:20,008 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:20,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:20,222 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:20,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-10-25 23:12:20,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:20,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632120960] [2020-10-25 23:12:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-25 23:12:20,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632120960] [2020-10-25 23:12:20,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683255370] [2020-10-25 23:12:20,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:20,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-25 23:12:20,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:20,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-25 23:12:20,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-25 23:12:20,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:20,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-25 23:12:20,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560142206] [2020-10-25 23:12:20,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-25 23:12:20,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:20,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-25 23:12:20,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-25 23:12:20,519 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-10-25 23:12:20,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:20,611 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-25 23:12:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 23:12:20,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-10-25 23:12:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:20,613 INFO L225 Difference]: With dead ends: 34 [2020-10-25 23:12:20,613 INFO L226 Difference]: Without dead ends: 30 [2020-10-25 23:12:20,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-25 23:12:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-25 23:12:20,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-25 23:12:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-25 23:12:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-25 23:12:20,619 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-10-25 23:12:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:20,620 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-25 23:12:20,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-25 23:12:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-25 23:12:20,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-25 23:12:20,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:20,621 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:20,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-25 23:12:20,834 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:20,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:20,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1831214410, now seen corresponding path program 6 times [2020-10-25 23:12:20,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:20,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880781180] [2020-10-25 23:12:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:20,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-25 23:12:21,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880781180] [2020-10-25 23:12:21,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727352534] [2020-10-25 23:12:21,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:21,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-25 23:12:21,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:21,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-25 23:12:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-25 23:12:21,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:21,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-25 23:12:21,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94769082] [2020-10-25 23:12:21,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 23:12:21,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:21,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 23:12:21,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-25 23:12:21,133 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-10-25 23:12:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:21,242 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-10-25 23:12:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-25 23:12:21,242 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-25 23:12:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:21,243 INFO L225 Difference]: With dead ends: 37 [2020-10-25 23:12:21,244 INFO L226 Difference]: Without dead ends: 33 [2020-10-25 23:12:21,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-10-25 23:12:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-25 23:12:21,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-25 23:12:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-25 23:12:21,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-10-25 23:12:21,250 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-10-25 23:12:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:21,250 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-10-25 23:12:21,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 23:12:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-10-25 23:12:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-25 23:12:21,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:21,252 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:21,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:21,453 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:21,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1739954964, now seen corresponding path program 7 times [2020-10-25 23:12:21,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:21,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888732254] [2020-10-25 23:12:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:21,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:21,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-25 23:12:21,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888732254] [2020-10-25 23:12:21,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231922355] [2020-10-25 23:12:21,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:21,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-25 23:12:21,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-25 23:12:21,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:21,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-25 23:12:21,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2177976] [2020-10-25 23:12:21,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-25 23:12:21,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:21,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-25 23:12:21,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-25 23:12:21,854 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-10-25 23:12:21,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:21,986 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-25 23:12:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-25 23:12:21,986 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-10-25 23:12:21,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:21,987 INFO L225 Difference]: With dead ends: 40 [2020-10-25 23:12:21,987 INFO L226 Difference]: Without dead ends: 36 [2020-10-25 23:12:21,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-10-25 23:12:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-25 23:12:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-25 23:12:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-25 23:12:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-10-25 23:12:21,993 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-10-25 23:12:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:21,994 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-10-25 23:12:21,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-25 23:12:21,994 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-10-25 23:12:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-25 23:12:21,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:21,995 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:22,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:22,197 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:22,198 INFO L82 PathProgramCache]: Analyzing trace with hash -632151670, now seen corresponding path program 8 times [2020-10-25 23:12:22,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:22,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644036726] [2020-10-25 23:12:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 23:12:22,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644036726] [2020-10-25 23:12:22,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476295550] [2020-10-25 23:12:22,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:22,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:12:22,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:22,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-25 23:12:22,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-25 23:12:22,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:22,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-25 23:12:22,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831306293] [2020-10-25 23:12:22,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-25 23:12:22,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:22,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-25 23:12:22,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-10-25 23:12:22,692 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-10-25 23:12:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:22,906 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-10-25 23:12:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-25 23:12:22,907 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-10-25 23:12:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:22,908 INFO L225 Difference]: With dead ends: 43 [2020-10-25 23:12:22,908 INFO L226 Difference]: Without dead ends: 39 [2020-10-25 23:12:22,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-10-25 23:12:22,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-25 23:12:22,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-25 23:12:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-25 23:12:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-25 23:12:22,923 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-10-25 23:12:22,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:22,923 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-25 23:12:22,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-25 23:12:22,924 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-25 23:12:22,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-25 23:12:22,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:22,926 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:23,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-25 23:12:23,127 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:23,128 INFO L82 PathProgramCache]: Analyzing trace with hash 764702676, now seen corresponding path program 9 times [2020-10-25 23:12:23,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:23,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002526216] [2020-10-25 23:12:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-25 23:12:23,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002526216] [2020-10-25 23:12:23,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441182533] [2020-10-25 23:12:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:23,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-25 23:12:23,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-25 23:12:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-25 23:12:23,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:23,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-25 23:12:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235608511] [2020-10-25 23:12:23,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-25 23:12:23,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-25 23:12:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-25 23:12:23,733 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-10-25 23:12:23,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:23,916 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-10-25 23:12:23,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-25 23:12:23,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-25 23:12:23,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:23,918 INFO L225 Difference]: With dead ends: 46 [2020-10-25 23:12:23,918 INFO L226 Difference]: Without dead ends: 42 [2020-10-25 23:12:23,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-10-25 23:12:23,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-25 23:12:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-25 23:12:23,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-25 23:12:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-25 23:12:23,925 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-10-25 23:12:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:23,925 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-25 23:12:23,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-25 23:12:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-25 23:12:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-25 23:12:23,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:23,926 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:24,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:24,140 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:24,141 INFO L82 PathProgramCache]: Analyzing trace with hash 554800586, now seen corresponding path program 10 times [2020-10-25 23:12:24,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:24,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936924869] [2020-10-25 23:12:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-25 23:12:24,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936924869] [2020-10-25 23:12:24,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291344663] [2020-10-25 23:12:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:24,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 23:12:24,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:24,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-25 23:12:24,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-25 23:12:24,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:24,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-25 23:12:24,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123639135] [2020-10-25 23:12:24,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-25 23:12:24,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:24,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-25 23:12:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-10-25 23:12:24,694 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-10-25 23:12:24,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:24,881 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-25 23:12:24,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-25 23:12:24,885 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-25 23:12:24,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:24,886 INFO L225 Difference]: With dead ends: 49 [2020-10-25 23:12:24,887 INFO L226 Difference]: Without dead ends: 45 [2020-10-25 23:12:24,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-10-25 23:12:24,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-25 23:12:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-25 23:12:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-25 23:12:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-25 23:12:24,894 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-10-25 23:12:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:24,894 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-25 23:12:24,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-25 23:12:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-25 23:12:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-25 23:12:24,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:24,895 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:25,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:25,110 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:25,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:25,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1164946284, now seen corresponding path program 11 times [2020-10-25 23:12:25,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:25,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972775932] [2020-10-25 23:12:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-25 23:12:25,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972775932] [2020-10-25 23:12:25,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552016858] [2020-10-25 23:12:25,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:25,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-10-25 23:12:25,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-25 23:12:25,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-25 23:12:25,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:25,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-25 23:12:25,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997452093] [2020-10-25 23:12:25,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-25 23:12:25,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:25,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-25 23:12:25,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-10-25 23:12:25,736 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-10-25 23:12:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:26,009 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-25 23:12:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-25 23:12:26,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-25 23:12:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:26,011 INFO L225 Difference]: With dead ends: 52 [2020-10-25 23:12:26,011 INFO L226 Difference]: Without dead ends: 48 [2020-10-25 23:12:26,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-10-25 23:12:26,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-25 23:12:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-25 23:12:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-25 23:12:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-10-25 23:12:26,029 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-10-25 23:12:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:26,030 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-10-25 23:12:26,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-25 23:12:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-10-25 23:12:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-25 23:12:26,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:26,035 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:26,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-25 23:12:26,236 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:26,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1163888118, now seen corresponding path program 12 times [2020-10-25 23:12:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:26,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82396811] [2020-10-25 23:12:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:26,743 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-25 23:12:26,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82396811] [2020-10-25 23:12:26,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120500671] [2020-10-25 23:12:26,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:26,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-25 23:12:26,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-25 23:12:26,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-25 23:12:26,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:26,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-25 23:12:26,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945532504] [2020-10-25 23:12:26,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-25 23:12:26,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:26,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-25 23:12:26,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-10-25 23:12:26,944 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-10-25 23:12:27,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:27,215 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-10-25 23:12:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-25 23:12:27,216 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-25 23:12:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:27,217 INFO L225 Difference]: With dead ends: 55 [2020-10-25 23:12:27,217 INFO L226 Difference]: Without dead ends: 51 [2020-10-25 23:12:27,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-10-25 23:12:27,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-25 23:12:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-25 23:12:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-25 23:12:27,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-25 23:12:27,233 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-10-25 23:12:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:27,233 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-25 23:12:27,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-25 23:12:27,233 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-25 23:12:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-25 23:12:27,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:27,237 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:27,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-25 23:12:27,452 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:27,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:27,453 INFO L82 PathProgramCache]: Analyzing trace with hash -164804268, now seen corresponding path program 13 times [2020-10-25 23:12:27,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:27,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95907093] [2020-10-25 23:12:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:27,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-25 23:12:28,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95907093] [2020-10-25 23:12:28,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259415401] [2020-10-25 23:12:28,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-25 23:12:28,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-25 23:12:28,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:28,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-25 23:12:28,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77850687] [2020-10-25 23:12:28,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-25 23:12:28,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:28,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-25 23:12:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-10-25 23:12:28,269 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-10-25 23:12:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:28,514 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-25 23:12:28,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-25 23:12:28,515 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 88 [2020-10-25 23:12:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:28,516 INFO L225 Difference]: With dead ends: 58 [2020-10-25 23:12:28,516 INFO L226 Difference]: Without dead ends: 54 [2020-10-25 23:12:28,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-10-25 23:12:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-25 23:12:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-25 23:12:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-25 23:12:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-10-25 23:12:28,532 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-10-25 23:12:28,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:28,534 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-10-25 23:12:28,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-25 23:12:28,534 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-10-25 23:12:28,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-25 23:12:28,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:28,538 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:28,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-25 23:12:28,751 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:28,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1799016010, now seen corresponding path program 14 times [2020-10-25 23:12:28,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:28,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178551267] [2020-10-25 23:12:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:28,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:28,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:28,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:28,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:28,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-25 23:12:29,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178551267] [2020-10-25 23:12:29,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145203584] [2020-10-25 23:12:29,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:29,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:12:29,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:29,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-25 23:12:29,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-25 23:12:29,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:29,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-25 23:12:29,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703345591] [2020-10-25 23:12:29,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-25 23:12:29,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:29,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-25 23:12:29,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-10-25 23:12:29,580 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-10-25 23:12:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:29,858 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-25 23:12:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-25 23:12:29,859 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 94 [2020-10-25 23:12:29,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:29,860 INFO L225 Difference]: With dead ends: 61 [2020-10-25 23:12:29,860 INFO L226 Difference]: Without dead ends: 57 [2020-10-25 23:12:29,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-10-25 23:12:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-25 23:12:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-25 23:12:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-25 23:12:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-10-25 23:12:29,867 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-10-25 23:12:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:29,868 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-10-25 23:12:29,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-25 23:12:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-10-25 23:12:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-25 23:12:29,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:12:29,869 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:12:30,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:30,081 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:12:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:12:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1022316052, now seen corresponding path program 15 times [2020-10-25 23:12:30,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:12:30,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504197655] [2020-10-25 23:12:30,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:12:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:30,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:31,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:31,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:31,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:31,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:31,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:31,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:31,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:12:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:12:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-10-25 23:12:31,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504197655] [2020-10-25 23:12:31,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187178173] [2020-10-25 23:12:31,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:12:31,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-10-25 23:12:31,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:12:31,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 137 conjunts are in the unsatisfiable core [2020-10-25 23:12:31,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:12:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-10-25 23:12:34,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:12:34,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2020-10-25 23:12:34,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019032114] [2020-10-25 23:12:34,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-25 23:12:34,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:12:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-25 23:12:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=5037, Unknown=0, NotChecked=0, Total=5402 [2020-10-25 23:12:34,379 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 74 states. [2020-10-25 23:12:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:12:38,919 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-25 23:12:38,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-25 23:12:38,920 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 100 [2020-10-25 23:12:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:12:38,921 INFO L225 Difference]: With dead ends: 60 [2020-10-25 23:12:38,921 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 23:12:38,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=915, Invalid=11075, Unknown=0, NotChecked=0, Total=11990 [2020-10-25 23:12:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 23:12:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 23:12:38,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 23:12:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 23:12:38,926 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2020-10-25 23:12:38,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:12:38,926 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 23:12:38,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-25 23:12:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 23:12:38,927 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 23:12:39,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-25 23:12:39,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 23:12:39,177 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 23:12:39,177 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 23:12:39,178 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 23:12:39,178 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 23:12:39,178 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-25 23:12:39,178 INFO L274 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-10-25 23:12:39,178 INFO L274 CegarLoopResult]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-10-25 23:12:39,178 INFO L270 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 15) (= ULTIMATE.start_main_~b~0 0)) [2020-10-25 23:12:39,178 INFO L274 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-10-25 23:12:39,178 INFO L274 CegarLoopResult]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-10-25 23:12:39,178 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-25 23:12:39,179 INFO L274 CegarLoopResult]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-10-25 23:12:39,179 INFO L270 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-10-25 23:12:39,179 INFO L274 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-10-25 23:12:39,179 INFO L274 CegarLoopResult]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-10-25 23:12:39,179 INFO L274 CegarLoopResult]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-10-25 23:12:39,180 INFO L277 CegarLoopResult]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-10-25 23:12:39,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 11:12:39 BoogieIcfgContainer [2020-10-25 23:12:39,187 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 23:12:39,187 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 23:12:39,187 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 23:12:39,188 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 23:12:39,188 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:12:17" (3/4) ... [2020-10-25 23:12:39,194 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 23:12:39,201 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-10-25 23:12:39,209 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-25 23:12:39,209 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-25 23:12:39,210 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 23:12:39,210 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 23:12:39,255 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 23:12:39,255 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 23:12:39,257 INFO L168 Benchmark]: Toolchain (without parser) took 22683.57 ms. Allocated memory was 48.2 MB in the beginning and 220.2 MB in the end (delta: 172.0 MB). Free memory was 25.4 MB in the beginning and 95.4 MB in the end (delta: -70.0 MB). Peak memory consumption was 103.2 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:39,257 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 39.8 MB. Free memory was 23.3 MB in the beginning and 23.3 MB in the end (delta: 28.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:12:39,258 INFO L168 Benchmark]: CACSL2BoogieTranslator took 315.88 ms. Allocated memory is still 48.2 MB. Free memory was 24.9 MB in the beginning and 27.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:39,258 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.69 ms. Allocated memory is still 48.2 MB. Free memory was 27.0 MB in the beginning and 25.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:12:39,258 INFO L168 Benchmark]: Boogie Preprocessor took 19.34 ms. Allocated memory is still 48.2 MB. Free memory was 25.7 MB in the beginning and 24.8 MB in the end (delta: 952.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:39,259 INFO L168 Benchmark]: RCFGBuilder took 278.35 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 25.7 MB in the end (delta: -938.8 kB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:39,259 INFO L168 Benchmark]: TraceAbstraction took 21955.29 ms. Allocated memory was 48.2 MB in the beginning and 220.2 MB in the end (delta: 172.0 MB). Free memory was 25.2 MB in the beginning and 98.6 MB in the end (delta: -73.4 MB). Peak memory consumption was 98.8 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:39,260 INFO L168 Benchmark]: Witness Printer took 67.62 ms. Allocated memory is still 220.2 MB. Free memory was 98.6 MB in the beginning and 95.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:12:39,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 39.8 MB. Free memory was 23.3 MB in the beginning and 23.3 MB in the end (delta: 28.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 315.88 ms. Allocated memory is still 48.2 MB. Free memory was 24.9 MB in the beginning and 27.0 MB in the end (delta: -2.1 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.69 ms. Allocated memory is still 48.2 MB. Free memory was 27.0 MB in the beginning and 25.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.34 ms. Allocated memory is still 48.2 MB. Free memory was 25.7 MB in the beginning and 24.8 MB in the end (delta: 952.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 278.35 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 25.7 MB in the end (delta: -938.8 kB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 21955.29 ms. Allocated memory was 48.2 MB in the beginning and 220.2 MB in the end (delta: 172.0 MB). Free memory was 25.2 MB in the beginning and 98.6 MB in the end (delta: -73.4 MB). Peak memory consumption was 98.8 MB. Max. memory is 16.1 GB. * Witness Printer took 67.62 ms. Allocated memory is still 220.2 MB. Free memory was 98.6 MB in the beginning and 95.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.8s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 7.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 158 SDtfs, 520 SDslu, 1322 SDs, 0 SdLazy, 2208 SolverSat, 163 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1485 GetRequests, 1093 SyntacticMatches, 0 SemanticMatches, 392 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3283 ImplicationChecksByTransitivity, 9.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.6s InterpolantComputationTime, 1750 NumberOfCodeBlocks, 1750 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1719 ConstructedInterpolants, 0 QuantifiedInterpolants, 393042 SizeOfPredicates, 154 NumberOfNonLiveVariables, 3015 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 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 correct! Received shutdown request...