./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.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/fibo_5-1.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 66ecdb3150790d7b9fa430121dbc9b6f1f7ee64a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 23:11:23,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 23:11:23,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 23:11:23,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 23:11:23,171 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 23:11:23,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 23:11:23,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 23:11:23,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 23:11:23,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 23:11:23,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 23:11:23,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 23:11:23,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 23:11:23,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 23:11:23,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 23:11:23,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 23:11:23,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 23:11:23,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 23:11:23,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 23:11:23,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 23:11:23,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 23:11:23,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 23:11:23,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 23:11:23,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 23:11:23,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 23:11:23,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 23:11:23,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 23:11:23,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 23:11:23,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 23:11:23,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 23:11:23,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 23:11:23,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 23:11:23,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 23:11:23,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 23:11:23,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 23:11:23,270 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 23:11:23,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 23:11:23,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 23:11:23,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 23:11:23,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 23:11:23,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 23:11:23,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 23:11:23,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 23:11:23,349 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 23:11:23,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 23:11:23,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 23:11:23,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 23:11:23,355 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 23:11:23,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 23:11:23,356 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 23:11:23,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 23:11:23,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 23:11:23,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 23:11:23,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 23:11:23,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 23:11:23,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 23:11:23,359 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 23:11:23,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 23:11:23,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 23:11:23,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 23:11:23,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 23:11:23,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 23:11:23,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 23:11:23,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 23:11:23,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 23:11:23,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 23:11:23,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 23:11:23,363 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 23:11:23,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 23:11:23,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 23:11:23,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 23:11:23,364 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 23:11:23,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66ecdb3150790d7b9fa430121dbc9b6f1f7ee64a [2020-10-25 23:11:23,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 23:11:23,829 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 23:11:23,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 23:11:23,835 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 23:11:23,836 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 23:11:23,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2020-10-25 23:11:23,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f408b8e03/abafe071b0054390a73894768a5e7b85/FLAG2d3299836 [2020-10-25 23:11:24,636 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 23:11:24,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2020-10-25 23:11:24,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f408b8e03/abafe071b0054390a73894768a5e7b85/FLAG2d3299836 [2020-10-25 23:11:24,984 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f408b8e03/abafe071b0054390a73894768a5e7b85 [2020-10-25 23:11:24,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 23:11:24,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 23:11:25,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 23:11:25,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 23:11:25,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 23:11:25,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:11:24" (1/1) ... [2020-10-25 23:11:25,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70bfd145 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25, skipping insertion in model container [2020-10-25 23:11:25,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 11:11:24" (1/1) ... [2020-10-25 23:11:25,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 23:11:25,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 23:11:25,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:11:25,279 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 23:11:25,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 23:11:25,318 INFO L208 MainTranslator]: Completed translation [2020-10-25 23:11:25,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25 WrapperNode [2020-10-25 23:11:25,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 23:11:25,321 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 23:11:25,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 23:11:25,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 23:11:25,333 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 23:11:25,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 23:11:25,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 23:11:25,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 23:11:25,376 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,397 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (1/1) ... [2020-10-25 23:11:25,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 23:11:25,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 23:11:25,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 23:11:25,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 23:11:25,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (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 23:11:25,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 23:11:25,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 23:11:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 23:11:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 23:11:25,497 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-25 23:11:25,497 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-25 23:11:26,038 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 23:11:26,040 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-25 23:11:26,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:11:26 BoogieIcfgContainer [2020-10-25 23:11:26,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 23:11:26,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 23:11:26,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 23:11:26,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 23:11:26,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 11:11:24" (1/3) ... [2020-10-25 23:11:26,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1b1ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:11:26, skipping insertion in model container [2020-10-25 23:11:26,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 11:11:25" (2/3) ... [2020-10-25 23:11:26,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c1b1ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 11:11:26, skipping insertion in model container [2020-10-25 23:11:26,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:11:26" (3/3) ... [2020-10-25 23:11:26,057 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-10-25 23:11:26,072 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 23:11:26,079 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 23:11:26,096 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 23:11:26,145 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 23:11:26,146 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 23:11:26,146 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 23:11:26,147 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 23:11:26,147 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 23:11:26,147 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 23:11:26,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 23:11:26,148 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 23:11:26,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-25 23:11:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-25 23:11:26,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:26,190 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:26,191 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:26,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:26,201 INFO L82 PathProgramCache]: Analyzing trace with hash -730685886, now seen corresponding path program 1 times [2020-10-25 23:11:26,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:26,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608303757] [2020-10-25 23:11:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:26,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:26,593 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 23:11:26,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608303757] [2020-10-25 23:11:26,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:11:26,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-25 23:11:26,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352270162] [2020-10-25 23:11:26,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 23:11:26,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:26,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 23:11:26,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 23:11:26,633 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-10-25 23:11:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:26,743 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-10-25 23:11:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 23:11:26,745 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-25 23:11:26,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:26,755 INFO L225 Difference]: With dead ends: 31 [2020-10-25 23:11:26,756 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 23:11:26,759 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 23:11:26,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 23:11:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-25 23:11:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 23:11:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-25 23:11:26,805 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2020-10-25 23:11:26,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:26,805 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-25 23:11:26,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 23:11:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-25 23:11:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-25 23:11:26,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:26,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:26,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 23:11:26,808 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:26,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:26,809 INFO L82 PathProgramCache]: Analyzing trace with hash -461623668, now seen corresponding path program 1 times [2020-10-25 23:11:26,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:26,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372922592] [2020-10-25 23:11:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:26,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:26,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:26,904 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 23:11:26,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372922592] [2020-10-25 23:11:26,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 23:11:26,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-25 23:11:26,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615610278] [2020-10-25 23:11:26,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-25 23:11:26,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-25 23:11:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-25 23:11:26,909 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-10-25 23:11:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:26,981 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-10-25 23:11:26,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-25 23:11:26,983 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-25 23:11:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:26,984 INFO L225 Difference]: With dead ends: 24 [2020-10-25 23:11:26,984 INFO L226 Difference]: Without dead ends: 20 [2020-10-25 23:11:26,986 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 23:11:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-25 23:11:26,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-25 23:11:26,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 23:11:26,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-25 23:11:26,994 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-10-25 23:11:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:26,995 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-25 23:11:26,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-25 23:11:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-25 23:11:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-25 23:11:26,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:26,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:26,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 23:11:26,998 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:26,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1253239047, now seen corresponding path program 1 times [2020-10-25 23:11:26,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:27,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740942281] [2020-10-25 23:11:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-25 23:11:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 23:11:27,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740942281] [2020-10-25 23:11:27,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189411220] [2020-10-25 23:11:27,116 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 23:11:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 23:11:27,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:11:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-25 23:11:27,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:11:27,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-10-25 23:11:27,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699000452] [2020-10-25 23:11:27,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 23:11:27,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:27,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 23:11:27,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-25 23:11:27,321 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 9 states. [2020-10-25 23:11:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:27,451 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-10-25 23:11:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-25 23:11:27,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-10-25 23:11:27,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:27,453 INFO L225 Difference]: With dead ends: 35 [2020-10-25 23:11:27,454 INFO L226 Difference]: Without dead ends: 20 [2020-10-25 23:11:27,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-25 23:11:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-25 23:11:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-25 23:11:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-25 23:11:27,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-25 23:11:27,463 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 23 [2020-10-25 23:11:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:27,464 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-25 23:11:27,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 23:11:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-25 23:11:27,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-25 23:11:27,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:27,466 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:27,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 23:11:27,681 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1685451365, now seen corresponding path program 1 times [2020-10-25 23:11:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:27,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645203685] [2020-10-25 23:11:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-25 23:11:27,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645203685] [2020-10-25 23:11:27,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650381343] [2020-10-25 23:11:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:11:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:27,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-25 23:11:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:11:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-25 23:11:27,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:11:27,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-25 23:11:27,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236795948] [2020-10-25 23:11:27,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-25 23:11:27,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:27,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-25 23:11:27,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-25 23:11:27,939 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 7 states. [2020-10-25 23:11:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:28,045 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-10-25 23:11:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-25 23:11:28,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-25 23:11:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:28,049 INFO L225 Difference]: With dead ends: 38 [2020-10-25 23:11:28,049 INFO L226 Difference]: Without dead ends: 34 [2020-10-25 23:11:28,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 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 23:11:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-25 23:11:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-25 23:11:28,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-25 23:11:28,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2020-10-25 23:11:28,062 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 24 [2020-10-25 23:11:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:28,063 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2020-10-25 23:11:28,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-25 23:11:28,063 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2020-10-25 23:11:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-25 23:11:28,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:28,066 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:28,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:11:28,282 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:28,283 INFO L82 PathProgramCache]: Analyzing trace with hash 228714308, now seen corresponding path program 2 times [2020-10-25 23:11:28,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:28,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283195704] [2020-10-25 23:11:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:28,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:28,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:28,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:28,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:28,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-25 23:11:28,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283195704] [2020-10-25 23:11:28,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234947311] [2020-10-25 23:11:28,504 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 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 23:11:28,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 23:11:28,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:11:28,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 23:11:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:11:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-25 23:11:28,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:11:28,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-10-25 23:11:28,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225508268] [2020-10-25 23:11:28,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 23:11:28,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:28,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 23:11:28,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-25 23:11:28,661 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 12 states. [2020-10-25 23:11:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:28,933 INFO L93 Difference]: Finished difference Result 69 states and 106 transitions. [2020-10-25 23:11:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-25 23:11:28,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-25 23:11:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:28,936 INFO L225 Difference]: With dead ends: 69 [2020-10-25 23:11:28,936 INFO L226 Difference]: Without dead ends: 38 [2020-10-25 23:11:28,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-25 23:11:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-25 23:11:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-25 23:11:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-25 23:11:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-25 23:11:28,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 37 [2020-10-25 23:11:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:28,948 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-25 23:11:28,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 23:11:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-25 23:11:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-25 23:11:28,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:28,952 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:29,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:11:29,167 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1825869943, now seen corresponding path program 3 times [2020-10-25 23:11:29,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:29,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412351736] [2020-10-25 23:11:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:29,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-25 23:11:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-25 23:11:29,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412351736] [2020-10-25 23:11:29,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121548640] [2020-10-25 23:11:29,402 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 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 23:11:29,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-25 23:11:29,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:11:29,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-25 23:11:29,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:11:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-10-25 23:11:29,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:11:29,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-10-25 23:11:29,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595606372] [2020-10-25 23:11:29,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-25 23:11:29,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-25 23:11:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-25 23:11:29,542 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 9 states. [2020-10-25 23:11:29,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:29,717 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-25 23:11:29,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-25 23:11:29,718 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 79 [2020-10-25 23:11:29,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:29,722 INFO L225 Difference]: With dead ends: 80 [2020-10-25 23:11:29,722 INFO L226 Difference]: Without dead ends: 76 [2020-10-25 23:11:29,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 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 23:11:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-25 23:11:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-10-25 23:11:29,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-25 23:11:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2020-10-25 23:11:29,739 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 79 [2020-10-25 23:11:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:29,740 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2020-10-25 23:11:29,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-25 23:11:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2020-10-25 23:11:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-25 23:11:29,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:29,745 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:29,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:11:29,960 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1742961929, now seen corresponding path program 4 times [2020-10-25 23:11:29,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:29,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261992501] [2020-10-25 23:11:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-25 23:11:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-25 23:11:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:30,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:30,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-25 23:11:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-10-25 23:11:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261992501] [2020-10-25 23:11:30,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126413241] [2020-10-25 23:11:30,484 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 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 23:11:30,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-25 23:11:30,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:11:30,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-25 23:11:30,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:11:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-25 23:11:30,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:11:30,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 16 [2020-10-25 23:11:30,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11715441] [2020-10-25 23:11:30,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-25 23:11:30,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:30,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-25 23:11:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-25 23:11:30,783 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand 16 states. [2020-10-25 23:11:31,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:31,510 INFO L93 Difference]: Finished difference Result 143 states and 252 transitions. [2020-10-25 23:11:31,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-25 23:11:31,512 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 133 [2020-10-25 23:11:31,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:31,513 INFO L225 Difference]: With dead ends: 143 [2020-10-25 23:11:31,513 INFO L226 Difference]: Without dead ends: 66 [2020-10-25 23:11:31,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=767, Unknown=0, NotChecked=0, Total=992 [2020-10-25 23:11:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-25 23:11:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2020-10-25 23:11:31,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-25 23:11:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-25 23:11:31,532 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 133 [2020-10-25 23:11:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:31,532 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-25 23:11:31,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-25 23:11:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-25 23:11:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-25 23:11:31,534 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:31,535 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:31,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-25 23:11:31,748 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:31,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash -575030355, now seen corresponding path program 5 times [2020-10-25 23:11:31,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:31,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175370330] [2020-10-25 23:11:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:31,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:31,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:31,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-25 23:11:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-25 23:11:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-25 23:11:32,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175370330] [2020-10-25 23:11:32,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381909760] [2020-10-25 23:11:32,376 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 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 23:11:32,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-25 23:11:32,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:11:32,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 63 conjunts are in the unsatisfiable core [2020-10-25 23:11:32,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:11:32,857 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-25 23:11:32,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:11:32,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2020-10-25 23:11:32,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054225839] [2020-10-25 23:11:32,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-25 23:11:32,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-25 23:11:32,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-25 23:11:32,861 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 20 states. [2020-10-25 23:11:33,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:33,080 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-25 23:11:33,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-25 23:11:33,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2020-10-25 23:11:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:33,083 INFO L225 Difference]: With dead ends: 69 [2020-10-25 23:11:33,083 INFO L226 Difference]: Without dead ends: 65 [2020-10-25 23:11:33,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-25 23:11:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-25 23:11:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-25 23:11:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-25 23:11:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-10-25 23:11:33,110 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 106 [2020-10-25 23:11:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:33,111 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-10-25 23:11:33,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-25 23:11:33,111 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-10-25 23:11:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-25 23:11:33,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 23:11:33,117 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 23:11:33,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:11:33,318 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 23:11:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 23:11:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1274768719, now seen corresponding path program 6 times [2020-10-25 23:11:33,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 23:11:33,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025574689] [2020-10-25 23:11:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 23:11:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-25 23:11:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-25 23:11:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-25 23:11:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-25 23:11:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-25 23:11:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-25 23:11:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-25 23:11:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 23:11:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 225 proven. 175 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-10-25 23:11:33,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025574689] [2020-10-25 23:11:33,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866357933] [2020-10-25 23:11:33,676 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 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 23:11:33,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-10-25 23:11:33,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 23:11:33,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-25 23:11:33,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 23:11:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-10-25 23:11:33,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 23:11:33,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2020-10-25 23:11:33,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62064898] [2020-10-25 23:11:33,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-25 23:11:33,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 23:11:33,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-25 23:11:33,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-25 23:11:33,926 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 15 states. [2020-10-25 23:11:34,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 23:11:34,335 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2020-10-25 23:11:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-25 23:11:34,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 133 [2020-10-25 23:11:34,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 23:11:34,337 INFO L225 Difference]: With dead ends: 124 [2020-10-25 23:11:34,337 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 23:11:34,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2020-10-25 23:11:34,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 23:11:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 23:11:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 23:11:34,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 23:11:34,340 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 133 [2020-10-25 23:11:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 23:11:34,340 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 23:11:34,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-25 23:11:34,341 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 23:11:34,341 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 23:11:34,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 23:11:34,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 23:11:35,118 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 30 [2020-10-25 23:11:35,123 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 23:11:35,123 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 23:11:35,124 INFO L270 CegarLoopResult]: At program point L31(lines 25 32) the Hoare annotation is: (<= 5 ULTIMATE.start_main_~x~0) [2020-10-25 23:11:35,124 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 23:11:35,124 INFO L274 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-10-25 23:11:35,124 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 23:11:35,124 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-10-25 23:11:35,124 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) [2020-10-25 23:11:35,124 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-10-25 23:11:35,125 INFO L274 CegarLoopResult]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-10-25 23:11:35,125 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-25 23:11:35,125 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-25 23:11:35,125 INFO L274 CegarLoopResult]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2020-10-25 23:11:35,125 INFO L274 CegarLoopResult]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2020-10-25 23:11:35,125 INFO L270 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo_#in~n| 1)) (= fibo_~n |fibo_#in~n|)) [2020-10-25 23:11:35,125 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-25 23:11:35,126 INFO L270 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (<= |fibo_#t~ret7| 1)) (.cse1 (<= 1 |fibo_#t~ret7|))) (or (and .cse0 .cse1 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)) (and .cse0 (<= 2 |fibo_#in~n|) .cse1 (<= |fibo_#in~n| 2)) (and (<= 5 |fibo_#in~n|) (<= |fibo_#t~ret7| 3) (<= 3 |fibo_#t~ret7|)) (and (<= |fibo_#t~ret7| 2) (<= |fibo_#in~n| 4) (<= 2 |fibo_#t~ret7|) (<= 4 |fibo_#in~n|)) (<= 6 |fibo_#in~n|))) (= fibo_~n |fibo_#in~n|)) [2020-10-25 23:11:35,126 INFO L274 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-10-25 23:11:35,126 INFO L274 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-10-25 23:11:35,126 INFO L274 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-10-25 23:11:35,126 INFO L277 CegarLoopResult]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2020-10-25 23:11:35,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 11:11:35 BoogieIcfgContainer [2020-10-25 23:11:35,146 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 23:11:35,146 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 23:11:35,146 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 23:11:35,147 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 23:11:35,147 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 11:11:26" (3/4) ... [2020-10-25 23:11:35,151 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 23:11:35,160 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2020-10-25 23:11:35,165 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-25 23:11:35,165 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 23:11:35,165 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 23:11:35,166 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 23:11:35,214 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 23:11:35,215 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 23:11:35,216 INFO L168 Benchmark]: Toolchain (without parser) took 10222.68 ms. Allocated memory was 44.0 MB in the beginning and 151.0 MB in the end (delta: 107.0 MB). Free memory was 21.6 MB in the beginning and 100.6 MB in the end (delta: -79.0 MB). Peak memory consumption was 30.0 MB. Max. memory is 16.1 GB. [2020-10-25 23:11:35,217 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 35.7 MB. Free memory was 22.3 MB in the beginning and 22.3 MB in the end (delta: 22.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:11:35,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.73 ms. Allocated memory is still 44.0 MB. Free memory was 21.0 MB in the beginning and 21.2 MB in the end (delta: -187.9 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. [2020-10-25 23:11:35,219 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.53 ms. Allocated memory is still 44.0 MB. Free memory was 21.2 MB in the beginning and 19.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 23:11:35,219 INFO L168 Benchmark]: Boogie Preprocessor took 38.46 ms. Allocated memory is still 44.0 MB. Free memory was 19.8 MB in the beginning and 28.9 MB in the end (delta: -9.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. [2020-10-25 23:11:35,222 INFO L168 Benchmark]: RCFGBuilder took 640.80 ms. Allocated memory is still 44.0 MB. Free memory was 28.9 MB in the beginning and 27.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-10-25 23:11:35,227 INFO L168 Benchmark]: TraceAbstraction took 9098.85 ms. Allocated memory was 44.0 MB in the beginning and 151.0 MB in the end (delta: 107.0 MB). Free memory was 27.0 MB in the beginning and 102.8 MB in the end (delta: -75.8 MB). Peak memory consumption was 86.2 MB. Max. memory is 16.1 GB. [2020-10-25 23:11:35,228 INFO L168 Benchmark]: Witness Printer took 68.36 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 100.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 23:11:35,235 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 35.7 MB. Free memory was 22.3 MB in the beginning and 22.3 MB in the end (delta: 22.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.73 ms. Allocated memory is still 44.0 MB. Free memory was 21.0 MB in the beginning and 21.2 MB in the end (delta: -187.9 kB). Peak memory consumption was 3.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.53 ms. Allocated memory is still 44.0 MB. Free memory was 21.2 MB in the beginning and 19.9 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.46 ms. Allocated memory is still 44.0 MB. Free memory was 19.8 MB in the beginning and 28.9 MB in the end (delta: -9.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 16.1 GB. * RCFGBuilder took 640.80 ms. Allocated memory is still 44.0 MB. Free memory was 28.9 MB in the beginning and 27.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9098.85 ms. Allocated memory was 44.0 MB in the beginning and 151.0 MB in the end (delta: 107.0 MB). Free memory was 27.0 MB in the beginning and 102.8 MB in the end (delta: -75.8 MB). Peak memory consumption was 86.2 MB. Max. memory is 16.1 GB. * Witness Printer took 68.36 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 100.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 5 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.4s, OverallIterations: 9, TraceHistogramMax: 19, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 176 SDtfs, 253 SDslu, 766 SDs, 0 SdLazy, 1164 SolverSat, 190 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 690 SyntacticMatches, 9 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, 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, 9 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 128 PreInvPairs, 192 NumberOfFragments, 76 HoareAnnotationTreeSize, 128 FomulaSimplifications, 486 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 830 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 1091 NumberOfCodeBlocks, 1061 NumberOfCodeBlocksAsserted, 53 NumberOfCheckSat, 1075 ConstructedInterpolants, 0 QuantifiedInterpolants, 240759 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1279 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 4082/5608 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...