./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/array-fpi/eqn2f.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 d865065a7c8613a66332b84e9d5b1d95cce65492 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-19 22:11:44,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:11:44,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:11:44,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:11:44,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:11:44,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:11:44,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:11:44,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:11:44,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:11:44,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:11:44,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:11:44,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:11:44,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:11:44,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:11:44,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:11:44,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:11:44,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:11:44,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:11:44,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:11:44,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:11:44,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:11:44,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:11:44,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:11:44,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:11:44,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:11:44,273 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:11:44,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:11:44,274 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:11:44,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:11:44,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:11:44,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:11:44,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:11:44,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:11:44,278 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:11:44,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:11:44,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:11:44,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:11:44,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:11:44,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:11:44,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:11:44,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:11:44,284 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:11:44,333 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:11:44,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:11:44,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:11:44,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:11:44,338 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:11:44,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:11:44,339 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:11:44,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:11:44,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:11:44,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:11:44,341 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:11:44,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:11:44,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:11:44,342 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:11:44,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:11:44,343 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:11:44,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:11:44,345 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:11:44,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:11:44,345 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:11:44,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:11:44,346 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:11:44,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:11:44,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:11:44,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:11:44,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:11:44,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:11:44,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:11:44,348 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:11:44,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> d865065a7c8613a66332b84e9d5b1d95cce65492 [2020-10-19 22:11:44,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:11:44,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:11:44,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:11:44,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:11:44,647 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:11:44,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2f.c [2020-10-19 22:11:44,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c3617b31/4a401ed84d474b5db2f68d50ba1a33a0/FLAG6e1e1a54f [2020-10-19 22:11:45,297 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:11:45,298 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2f.c [2020-10-19 22:11:45,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c3617b31/4a401ed84d474b5db2f68d50ba1a33a0/FLAG6e1e1a54f [2020-10-19 22:11:45,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c3617b31/4a401ed84d474b5db2f68d50ba1a33a0 [2020-10-19 22:11:45,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:11:45,584 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:11:45,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:45,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:11:45,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:11:45,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d4ab3d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45, skipping insertion in model container [2020-10-19 22:11:45,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:11:45,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:11:45,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:45,863 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:11:45,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:11:45,905 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:11:45,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45 WrapperNode [2020-10-19 22:11:45,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:11:45,918 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:45,918 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:11:45,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:11:45,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,937 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,963 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:11:45,964 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:11:45,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:11:45,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:11:45,975 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,992 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (1/1) ... [2020-10-19 22:11:45,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:11:45,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:11:45,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:11:45,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:11:45,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (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 [2020-10-19 22:11:46,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:11:46,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:11:46,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:11:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:11:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:11:46,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:11:46,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:11:46,341 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:11:46,341 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-19 22:11:46,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:46 BoogieIcfgContainer [2020-10-19 22:11:46,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:11:46,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:11:46,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:11:46,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:11:46,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:11:45" (1/3) ... [2020-10-19 22:11:46,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a230e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:46, skipping insertion in model container [2020-10-19 22:11:46,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:11:45" (2/3) ... [2020-10-19 22:11:46,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a230e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:11:46, skipping insertion in model container [2020-10-19 22:11:46,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:46" (3/3) ... [2020-10-19 22:11:46,354 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn2f.c [2020-10-19 22:11:46,372 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:11:46,394 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:11:46,414 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:11:46,447 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:11:46,447 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:11:46,447 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:11:46,448 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:11:46,448 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:11:46,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:11:46,449 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:11:46,449 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:11:46,474 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-19 22:11:46,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:11:46,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:46,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:46,486 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:46,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2020-10-19 22:11:46,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:46,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555799716] [2020-10-19 22:11:46,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:46,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555799716] [2020-10-19 22:11:46,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:46,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:11:46,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70344466] [2020-10-19 22:11:46,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:11:46,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:46,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:11:46,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:11:46,662 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-10-19 22:11:46,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:46,678 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-10-19 22:11:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:11:46,680 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-19 22:11:46,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:46,690 INFO L225 Difference]: With dead ends: 39 [2020-10-19 22:11:46,691 INFO L226 Difference]: Without dead ends: 17 [2020-10-19 22:11:46,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:11:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-19 22:11:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-19 22:11:46,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 22:11:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-19 22:11:46,728 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-10-19 22:11:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:46,729 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-19 22:11:46,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:11:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-19 22:11:46,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:11:46,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:46,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:46,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:11:46,739 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:46,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2020-10-19 22:11:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:46,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367562581] [2020-10-19 22:11:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:46,771 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:11:46,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1092062699] [2020-10-19 22:11:46,772 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 [2020-10-19 22:11:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:46,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 22:11:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:46,965 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:46,965 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 39 [2020-10-19 22:11:46,967 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:46,998 INFO L625 ElimStorePlain]: treesize reduction 16, result has 59.0 percent of original size [2020-10-19 22:11:47,010 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:47,011 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:7 [2020-10-19 22:11:47,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:47,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367562581] [2020-10-19 22:11:47,111 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 22:11:47,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092062699] [2020-10-19 22:11:47,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:47,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 22:11:47,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082139263] [2020-10-19 22:11:47,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:11:47,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:47,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:11:47,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:11:47,115 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-19 22:11:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:47,222 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-10-19 22:11:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 22:11:47,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-10-19 22:11:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:47,224 INFO L225 Difference]: With dead ends: 34 [2020-10-19 22:11:47,224 INFO L226 Difference]: Without dead ends: 32 [2020-10-19 22:11:47,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:11:47,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-19 22:11:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-10-19 22:11:47,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:11:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-19 22:11:47,233 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-10-19 22:11:47,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:47,233 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-19 22:11:47,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:11:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-19 22:11:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:11:47,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:47,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:47,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-19 22:11:47,450 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2020-10-19 22:11:47,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:47,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094089881] [2020-10-19 22:11:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:47,477 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:11:47,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65988625] [2020-10-19 22:11:47,478 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 [2020-10-19 22:11:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:47,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 22:11:47,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:47,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094089881] [2020-10-19 22:11:47,589 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 22:11:47,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65988625] [2020-10-19 22:11:47,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:47,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 22:11:47,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386856231] [2020-10-19 22:11:47,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:11:47,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:47,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:11:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:11:47,592 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-10-19 22:11:47,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:47,729 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-19 22:11:47,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 22:11:47,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-19 22:11:47,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:47,732 INFO L225 Difference]: With dead ends: 49 [2020-10-19 22:11:47,732 INFO L226 Difference]: Without dead ends: 40 [2020-10-19 22:11:47,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:11:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-19 22:11:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2020-10-19 22:11:47,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:11:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-19 22:11:47,751 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-10-19 22:11:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:47,752 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-19 22:11:47,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:11:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-19 22:11:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 22:11:47,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:47,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:47,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:47,969 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2020-10-19 22:11:47,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:47,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507156662] [2020-10-19 22:11:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:47,996 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:11:47,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926816332] [2020-10-19 22:11:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 22:11:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:48,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 22:11:48,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:48,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507156662] [2020-10-19 22:11:48,126 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 22:11:48,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926816332] [2020-10-19 22:11:48,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:11:48,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-19 22:11:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951403976] [2020-10-19 22:11:48,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 22:11:48,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:48,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 22:11:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 22:11:48,129 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-10-19 22:11:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:48,218 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-19 22:11:48,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 22:11:48,219 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-19 22:11:48,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:48,220 INFO L225 Difference]: With dead ends: 44 [2020-10-19 22:11:48,221 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 22:11:48,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:11:48,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 22:11:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2020-10-19 22:11:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 22:11:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-19 22:11:48,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2020-10-19 22:11:48,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:48,228 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-19 22:11:48,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 22:11:48,228 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-19 22:11:48,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:11:48,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:48,229 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:48,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:48,442 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:48,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:48,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1608719470, now seen corresponding path program 1 times [2020-10-19 22:11:48,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:48,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79611209] [2020-10-19 22:11:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:48,463 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:11:48,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969328561] [2020-10-19 22:11:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 22:11:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:48,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 22:11:48,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:48,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79611209] [2020-10-19 22:11:48,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 22:11:48,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969328561] [2020-10-19 22:11:48,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:11:48,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 22:11:48,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092100478] [2020-10-19 22:11:48,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 22:11:48,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:48,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 22:11:48,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 22:11:48,571 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-10-19 22:11:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:48,653 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-19 22:11:48,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 22:11:48,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-19 22:11:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:48,655 INFO L225 Difference]: With dead ends: 41 [2020-10-19 22:11:48,655 INFO L226 Difference]: Without dead ends: 27 [2020-10-19 22:11:48,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-19 22:11:48,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-19 22:11:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2020-10-19 22:11:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 22:11:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-19 22:11:48,660 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-10-19 22:11:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:48,661 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-19 22:11:48,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 22:11:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-19 22:11:48,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:11:48,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:48,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:48,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:48,872 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2020-10-19 22:11:48,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:48,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803917410] [2020-10-19 22:11:48,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:48,890 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:11:48,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979153709] [2020-10-19 22:11:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-10-19 22:11:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:11:48,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 22:11:48,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:48,987 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-10-19 22:11:48,989 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:48,996 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:49,002 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2020-10-19 22:11:49,003 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:49,012 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:49,013 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:11:49,013 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2020-10-19 22:11:49,070 INFO L350 Elim1Store]: treesize reduction 54, result has 46.0 percent of original size [2020-10-19 22:11:49,070 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 72 [2020-10-19 22:11:49,073 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:49,104 INFO L625 ElimStorePlain]: treesize reduction 27, result has 64.5 percent of original size [2020-10-19 22:11:49,105 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,108 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 22:11:49,108 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:49 [2020-10-19 22:11:49,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,179 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,239 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-10-19 22:11:49,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,280 INFO L441 ElimStorePlain]: Different costs {12=[|v_#memory_int_13|], 20=[v_prenex_3]} [2020-10-19 22:11:49,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:49,295 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-10-19 22:11:49,296 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2020-10-19 22:11:49,297 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:49,343 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:11:49,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:11:49,376 INFO L350 Elim1Store]: treesize reduction 17, result has 60.5 percent of original size [2020-10-19 22:11:49,376 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 85 [2020-10-19 22:11:49,378 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 22:11:49,458 INFO L625 ElimStorePlain]: treesize reduction 45, result has 72.6 percent of original size [2020-10-19 22:11:49,467 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-2 vars, End of recursive call: 5 dim-0 vars, and 2 xjuncts. [2020-10-19 22:11:49,467 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:115, output treesize:119 [2020-10-19 22:11:49,761 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-10-19 22:11:49,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:49,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:49,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,828 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:11:49,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:49,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 22:11:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:49,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803917410] [2020-10-19 22:11:49,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 22:11:49,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979153709] [2020-10-19 22:11:49,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:11:49,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-19 22:11:49,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713564012] [2020-10-19 22:11:49,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 22:11:49,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:49,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 22:11:49,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-19 22:11:49,975 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-10-19 22:11:54,378 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-19 22:11:54,852 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-19 22:11:55,201 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-19 22:11:56,750 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-19 22:11:57,064 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-19 22:11:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:57,465 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-19 22:11:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 22:11:57,467 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-19 22:11:57,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:57,468 INFO L225 Difference]: With dead ends: 44 [2020-10-19 22:11:57,468 INFO L226 Difference]: Without dead ends: 42 [2020-10-19 22:11:57,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-10-19 22:11:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-19 22:11:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-10-19 22:11:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-19 22:11:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-19 22:11:57,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-10-19 22:11:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:57,476 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-19 22:11:57,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 22:11:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-19 22:11:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:11:57,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:57,477 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:57,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-19 22:11:57,686 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:57,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1267903976, now seen corresponding path program 2 times [2020-10-19 22:11:57,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:57,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788734461] [2020-10-19 22:11:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:57,711 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:11:57,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436138086] [2020-10-19 22:11:57,712 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 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 [2020-10-19 22:11:57,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:11:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:11:57,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:11:57,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:57,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788734461] [2020-10-19 22:11:57,814 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 22:11:57,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436138086] [2020-10-19 22:11:57,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:11:57,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-19 22:11:57,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920915743] [2020-10-19 22:11:57,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 22:11:57,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:57,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 22:11:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:11:57,816 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-10-19 22:11:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:57,985 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-19 22:11:57,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:11:57,986 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-19 22:11:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:57,987 INFO L225 Difference]: With dead ends: 61 [2020-10-19 22:11:57,987 INFO L226 Difference]: Without dead ends: 52 [2020-10-19 22:11:57,989 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-19 22:11:57,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-19 22:11:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-19 22:11:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-19 22:11:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-19 22:11:57,995 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2020-10-19 22:11:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:57,996 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-19 22:11:57,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 22:11:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-19 22:11:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:11:57,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:57,997 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:58,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:58,200 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:58,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 3 times [2020-10-19 22:11:58,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:58,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836224423] [2020-10-19 22:11:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:58,220 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:11:58,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548408470] [2020-10-19 22:11:58,221 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 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 [2020-10-19 22:11:58,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 22:11:58,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:11:58,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:11:58,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:11:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:11:58,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836224423] [2020-10-19 22:11:58,318 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 22:11:58,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548408470] [2020-10-19 22:11:58,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 22:11:58,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-19 22:11:58,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033248937] [2020-10-19 22:11:58,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 22:11:58,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:11:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 22:11:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 22:11:58,320 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-10-19 22:11:58,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:11:58,486 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-19 22:11:58,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 22:11:58,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-19 22:11:58,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:11:58,489 INFO L225 Difference]: With dead ends: 56 [2020-10-19 22:11:58,489 INFO L226 Difference]: Without dead ends: 49 [2020-10-19 22:11:58,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:11:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-19 22:11:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2020-10-19 22:11:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 22:11:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-19 22:11:58,496 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2020-10-19 22:11:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:11:58,497 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-19 22:11:58,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 22:11:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-19 22:11:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 22:11:58,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:11:58,498 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:11:58,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:58,713 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:11:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:11:58,714 INFO L82 PathProgramCache]: Analyzing trace with hash 858128078, now seen corresponding path program 1 times [2020-10-19 22:11:58,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:11:58,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201895296] [2020-10-19 22:11:58,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:11:58,734 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:11:58,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090909870] [2020-10-19 22:11:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:11:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:11:58,785 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:11:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:11:58,806 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:11:58,838 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:11:58,839 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:11:59,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-19 22:11:59,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:11:59 BoogieIcfgContainer [2020-10-19 22:11:59,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:11:59,086 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:11:59,087 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:11:59,087 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:11:59,088 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:11:46" (3/4) ... [2020-10-19 22:11:59,090 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:11:59,154 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:11:59,154 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:11:59,156 INFO L168 Benchmark]: Toolchain (without parser) took 13577.44 ms. Allocated memory was 44.6 MB in the beginning and 62.9 MB in the end (delta: 18.4 MB). Free memory was 25.7 MB in the beginning and 18.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 25.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:59,157 INFO L168 Benchmark]: CDTParser took 0.98 ms. Allocated memory is still 33.0 MB. Free memory was 12.3 MB in the beginning and 12.2 MB in the end (delta: 50.4 kB). Peak memory consumption was 50.4 kB. Max. memory is 14.3 GB. [2020-10-19 22:11:59,157 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.24 ms. Allocated memory is still 44.6 MB. Free memory was 24.8 MB in the beginning and 13.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:59,158 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.82 ms. Allocated memory is still 44.6 MB. Free memory was 27.1 MB in the beginning and 25.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:59,159 INFO L168 Benchmark]: Boogie Preprocessor took 32.58 ms. Allocated memory is still 44.6 MB. Free memory was 25.4 MB in the beginning and 24.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:59,159 INFO L168 Benchmark]: RCFGBuilder took 346.98 ms. Allocated memory was 44.6 MB in the beginning and 47.2 MB in the end (delta: 2.6 MB). Free memory was 23.8 MB in the beginning and 29.0 MB in the end (delta: -5.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:59,160 INFO L168 Benchmark]: TraceAbstraction took 12740.86 ms. Allocated memory was 47.2 MB in the beginning and 62.9 MB in the end (delta: 15.7 MB). Free memory was 28.4 MB in the beginning and 22.3 MB in the end (delta: 6.1 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:59,161 INFO L168 Benchmark]: Witness Printer took 67.93 ms. Allocated memory is still 62.9 MB. Free memory was 21.6 MB in the beginning and 18.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:11:59,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.98 ms. Allocated memory is still 33.0 MB. Free memory was 12.3 MB in the beginning and 12.2 MB in the end (delta: 50.4 kB). Peak memory consumption was 50.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 321.24 ms. Allocated memory is still 44.6 MB. Free memory was 24.8 MB in the beginning and 13.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 45.82 ms. Allocated memory is still 44.6 MB. Free memory was 27.1 MB in the beginning and 25.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 32.58 ms. Allocated memory is still 44.6 MB. Free memory was 25.4 MB in the beginning and 24.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 346.98 ms. Allocated memory was 44.6 MB in the beginning and 47.2 MB in the end (delta: 2.6 MB). Free memory was 23.8 MB in the beginning and 29.0 MB in the end (delta: -5.2 MB). Peak memory consumption was 14.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 12740.86 ms. Allocated memory was 47.2 MB in the beginning and 62.9 MB in the end (delta: 15.7 MB). Free memory was 28.4 MB in the beginning and 22.3 MB in the end (delta: 6.1 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.3 GB. * Witness Printer took 67.93 ms. Allocated memory is still 62.9 MB. Free memory was 21.6 MB in the beginning and 18.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 8 [L32] b[0] = 1 [L34] i=1 VAL [N=2] [L34] COND TRUE i