./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/skippedu.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-tiling/skippedu.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 188f1f6278f7b64d732f6e67466f6eb857ea2297 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 21:53:57,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 21:53:57,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 21:53:57,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 21:53:57,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 21:53:57,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 21:53:57,471 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 21:53:57,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 21:53:57,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 21:53:57,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 21:53:57,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 21:53:57,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 21:53:57,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 21:53:57,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 21:53:57,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 21:53:57,501 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 21:53:57,503 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 21:53:57,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 21:53:57,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 21:53:57,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 21:53:57,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 21:53:57,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 21:53:57,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 21:53:57,524 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 21:53:57,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 21:53:57,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 21:53:57,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 21:53:57,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 21:53:57,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 21:53:57,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 21:53:57,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 21:53:57,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 21:53:57,550 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 21:53:57,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 21:53:57,553 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 21:53:57,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 21:53:57,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 21:53:57,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 21:53:57,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 21:53:57,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 21:53:57,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 21:53:57,562 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 21:53:57,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 21:53:57,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 21:53:57,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 21:53:57,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 21:53:57,606 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 21:53:57,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 21:53:57,607 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 21:53:57,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 21:53:57,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 21:53:57,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 21:53:57,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 21:53:57,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 21:53:57,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 21:53:57,608 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 21:53:57,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 21:53:57,609 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 21:53:57,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 21:53:57,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 21:53:57,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 21:53:57,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 21:53:57,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 21:53:57,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 21:53:57,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 21:53:57,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 21:53:57,612 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 21:53:57,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 21:53:57,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 21:53:57,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 21:53:57,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 21:53:57,613 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 -> 188f1f6278f7b64d732f6e67466f6eb857ea2297 [2020-10-19 21:53:57,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 21:53:57,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 21:53:57,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 21:53:57,864 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 21:53:57,865 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 21:53:57,865 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/skippedu.c [2020-10-19 21:53:57,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb2a15d4/a95d7ca1264041dba2005802f1bbebdf/FLAG5a2271611 [2020-10-19 21:53:58,454 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 21:53:58,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/skippedu.c [2020-10-19 21:53:58,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb2a15d4/a95d7ca1264041dba2005802f1bbebdf/FLAG5a2271611 [2020-10-19 21:53:58,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bb2a15d4/a95d7ca1264041dba2005802f1bbebdf [2020-10-19 21:53:58,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 21:53:58,827 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 21:53:58,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:58,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 21:53:58,833 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 21:53:58,834 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:58" (1/1) ... [2020-10-19 21:53:58,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c5904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:58, skipping insertion in model container [2020-10-19 21:53:58,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:53:58" (1/1) ... [2020-10-19 21:53:58,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 21:53:58,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 21:53:59,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:59,231 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 21:53:59,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:53:59,296 INFO L208 MainTranslator]: Completed translation [2020-10-19 21:53:59,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59 WrapperNode [2020-10-19 21:53:59,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 21:53:59,299 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:59,299 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 21:53:59,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 21:53:59,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,319 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 21:53:59,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 21:53:59,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 21:53:59,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 21:53:59,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,369 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (1/1) ... [2020-10-19 21:53:59,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 21:53:59,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 21:53:59,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 21:53:59,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 21:53:59,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (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 21:53:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 21:53:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 21:53:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 21:53:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 21:53:59,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 21:53:59,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 21:53:59,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 21:53:59,884 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 21:53:59,885 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-19 21:53:59,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:59 BoogieIcfgContainer [2020-10-19 21:53:59,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 21:53:59,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 21:53:59,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 21:53:59,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 21:53:59,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 09:53:58" (1/3) ... [2020-10-19 21:53:59,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5f17fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:59, skipping insertion in model container [2020-10-19 21:53:59,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:53:59" (2/3) ... [2020-10-19 21:53:59,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d5f17fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:53:59, skipping insertion in model container [2020-10-19 21:53:59,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:59" (3/3) ... [2020-10-19 21:53:59,894 INFO L111 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-10-19 21:53:59,904 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 21:53:59,912 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 21:53:59,926 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 21:53:59,948 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 21:53:59,948 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 21:53:59,948 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 21:53:59,949 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 21:53:59,949 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 21:53:59,950 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 21:53:59,950 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 21:53:59,950 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 21:53:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-19 21:53:59,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 21:53:59,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:53:59,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:53:59,982 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:53:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:53:59,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1607783550, now seen corresponding path program 1 times [2020-10-19 21:53:59,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:53:59,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071786421] [2020-10-19 21:53:59,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:54:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:54:00,134 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 21:54:00,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071786421] [2020-10-19 21:54:00,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:54:00,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 21:54:00,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088953407] [2020-10-19 21:54:00,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 21:54:00,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:54:00,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 21:54:00,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:54:00,159 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2020-10-19 21:54:00,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:54:00,180 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2020-10-19 21:54:00,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 21:54:00,182 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-19 21:54:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:54:00,193 INFO L225 Difference]: With dead ends: 44 [2020-10-19 21:54:00,193 INFO L226 Difference]: Without dead ends: 20 [2020-10-19 21:54:00,197 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 21:54:00,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-19 21:54:00,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-19 21:54:00,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 21:54:00,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-19 21:54:00,228 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2020-10-19 21:54:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:54:00,228 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-19 21:54:00,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 21:54:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-19 21:54:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 21:54:00,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:54:00,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:54:00,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 21:54:00,230 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:54:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:54:00,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1872951298, now seen corresponding path program 1 times [2020-10-19 21:54:00,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:54:00,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666558535] [2020-10-19 21:54:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:54:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:54:00,317 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 21:54:00,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666558535] [2020-10-19 21:54:00,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:54:00,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 21:54:00,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690128231] [2020-10-19 21:54:00,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:54:00,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:54:00,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:54:00,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 21:54:00,322 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2020-10-19 21:54:00,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:54:00,403 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2020-10-19 21:54:00,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:54:00,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-19 21:54:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:54:00,404 INFO L225 Difference]: With dead ends: 37 [2020-10-19 21:54:00,405 INFO L226 Difference]: Without dead ends: 22 [2020-10-19 21:54:00,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 21:54:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-19 21:54:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-19 21:54:00,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-19 21:54:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-10-19 21:54:00,412 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2020-10-19 21:54:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:54:00,413 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-10-19 21:54:00,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:54:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-10-19 21:54:00,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 21:54:00,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:54:00,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:54:00,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 21:54:00,415 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:54:00,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:54:00,416 INFO L82 PathProgramCache]: Analyzing trace with hash -270152420, now seen corresponding path program 1 times [2020-10-19 21:54:00,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:54:00,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782511944] [2020-10-19 21:54:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:54:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:54:00,507 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 21:54:00,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782511944] [2020-10-19 21:54:00,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765416991] [2020-10-19 21:54:00,508 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 21:54:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:54:00,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:54:00,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:54:00,688 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 21:54:00,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:54:00,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-19 21:54:00,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658171739] [2020-10-19 21:54:00,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 21:54:00,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:54:00,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 21:54:00,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:54:00,692 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2020-10-19 21:54:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:54:00,772 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-10-19 21:54:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:54:00,773 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-19 21:54:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:54:00,774 INFO L225 Difference]: With dead ends: 39 [2020-10-19 21:54:00,774 INFO L226 Difference]: Without dead ends: 24 [2020-10-19 21:54:00,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:54:00,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-19 21:54:00,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-19 21:54:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 21:54:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-19 21:54:00,781 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2020-10-19 21:54:00,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:54:00,781 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-19 21:54:00,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 21:54:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-19 21:54:00,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 21:54:00,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:54:00,783 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:54:00,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 21:54:00,995 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:54:00,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:54:00,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1873689926, now seen corresponding path program 2 times [2020-10-19 21:54:00,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:54:00,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355337292] [2020-10-19 21:54:00,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:54:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:54:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:54:01,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355337292] [2020-10-19 21:54:01,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:54:01,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 21:54:01,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184468932] [2020-10-19 21:54:01,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:54:01,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:54:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:54:01,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:54:01,224 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2020-10-19 21:54:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:54:01,300 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-19 21:54:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:54:01,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-19 21:54:01,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:54:01,301 INFO L225 Difference]: With dead ends: 35 [2020-10-19 21:54:01,302 INFO L226 Difference]: Without dead ends: 28 [2020-10-19 21:54:01,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:54:01,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-19 21:54:01,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-10-19 21:54:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 21:54:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-10-19 21:54:01,315 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2020-10-19 21:54:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:54:01,316 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-10-19 21:54:01,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:54:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-10-19 21:54:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 21:54:01,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:54:01,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:54:01,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 21:54:01,319 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:54:01,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:54:01,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1095507628, now seen corresponding path program 1 times [2020-10-19 21:54:01,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:54:01,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807279928] [2020-10-19 21:54:01,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:54:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:54:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:54:01,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807279928] [2020-10-19 21:54:01,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135681404] [2020-10-19 21:54:01,562 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 21:54:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:54:01,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 21:54:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:54:01,666 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2020-10-19 21:54:01,667 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:54:01,676 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:54:01,677 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:54:01,678 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-10-19 21:54:01,717 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-10-19 21:54:01,718 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-10-19 21:54:01,719 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 21:54:01,726 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 21:54:01,726 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 21:54:01,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-10-19 21:54:01,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 21:54:01,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 21:54:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:54:01,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:54:01,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-19 21:54:01,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74999503] [2020-10-19 21:54:01,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-19 21:54:01,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:54:01,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 21:54:01,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-19 21:54:01,887 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 13 states. [2020-10-19 21:54:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:54:02,432 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-10-19 21:54:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-19 21:54:02,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-10-19 21:54:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:54:02,434 INFO L225 Difference]: With dead ends: 78 [2020-10-19 21:54:02,434 INFO L226 Difference]: Without dead ends: 76 [2020-10-19 21:54:02,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2020-10-19 21:54:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-19 21:54:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2020-10-19 21:54:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-19 21:54:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-10-19 21:54:02,446 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2020-10-19 21:54:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:54:02,447 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-10-19 21:54:02,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-19 21:54:02,447 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-10-19 21:54:02,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 21:54:02,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:54:02,448 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:54:02,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:54:02,662 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:54:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:54:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash -415449258, now seen corresponding path program 1 times [2020-10-19 21:54:02,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:54:02,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225196943] [2020-10-19 21:54:02,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:54:02,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 21:54:02,694 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 21:54:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 21:54:02,737 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 21:54:02,761 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 21:54:02,762 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 21:54:02,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 21:54:02,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 09:54:02 BoogieIcfgContainer [2020-10-19 21:54:02,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 21:54:02,817 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 21:54:02,817 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 21:54:02,817 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 21:54:02,818 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:53:59" (3/4) ... [2020-10-19 21:54:02,821 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 21:54:02,887 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 21:54:02,887 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 21:54:02,889 INFO L168 Benchmark]: Toolchain (without parser) took 4067.23 ms. Allocated memory was 34.6 MB in the beginning and 58.2 MB in the end (delta: 23.6 MB). Free memory was 11.9 MB in the beginning and 10.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 25.3 MB. Max. memory is 14.3 GB. [2020-10-19 21:54:02,890 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 33.6 MB. Free memory was 18.8 MB in the beginning and 18.7 MB in the end (delta: 28.3 kB). Peak memory consumption was 28.3 kB. Max. memory is 14.3 GB. [2020-10-19 21:54:02,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 469.15 ms. Allocated memory was 34.6 MB in the beginning and 41.9 MB in the end (delta: 7.3 MB). Free memory was 11.0 MB in the beginning and 24.3 MB in the end (delta: -13.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 14.3 GB. [2020-10-19 21:54:02,891 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.45 ms. Allocated memory is still 41.9 MB. Free memory was 24.3 MB in the beginning and 22.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-19 21:54:02,892 INFO L168 Benchmark]: Boogie Preprocessor took 43.14 ms. Allocated memory is still 41.9 MB. Free memory was 22.3 MB in the beginning and 20.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-19 21:54:02,893 INFO L168 Benchmark]: RCFGBuilder took 493.55 ms. Allocated memory was 41.9 MB in the beginning and 41.4 MB in the end (delta: -524.3 kB). Free memory was 20.9 MB in the beginning and 14.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-19 21:54:02,893 INFO L168 Benchmark]: TraceAbstraction took 2928.69 ms. Allocated memory was 41.4 MB in the beginning and 58.2 MB in the end (delta: 16.8 MB). Free memory was 14.5 MB in the beginning and 13.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 14.3 GB. [2020-10-19 21:54:02,894 INFO L168 Benchmark]: Witness Printer took 70.41 ms. Allocated memory is still 58.2 MB. Free memory was 13.4 MB in the beginning and 10.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-19 21:54:02,899 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 33.6 MB. Free memory was 18.8 MB in the beginning and 18.7 MB in the end (delta: 28.3 kB). Peak memory consumption was 28.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 469.15 ms. Allocated memory was 34.6 MB in the beginning and 41.9 MB in the end (delta: 7.3 MB). Free memory was 11.0 MB in the beginning and 24.3 MB in the end (delta: -13.3 MB). Peak memory consumption was 7.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 47.45 ms. Allocated memory is still 41.9 MB. Free memory was 24.3 MB in the beginning and 22.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 43.14 ms. Allocated memory is still 41.9 MB. Free memory was 22.3 MB in the beginning and 20.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * RCFGBuilder took 493.55 ms. Allocated memory was 41.9 MB in the beginning and 41.4 MB in the end (delta: -524.3 kB). Free memory was 20.9 MB in the beginning and 14.9 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2928.69 ms. Allocated memory was 41.4 MB in the beginning and 58.2 MB in the end (delta: 16.8 MB). Free memory was 14.5 MB in the beginning and 13.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 17.9 MB. Max. memory is 14.3 GB. * Witness Printer took 70.41 ms. Allocated memory is still 58.2 MB. Free memory was 13.4 MB in the beginning and 10.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int SIZE; [L14] const int MAX = 100000; VAL [MAX=100000, SIZE=0] [L18] SIZE = __VERIFIER_nondet_int() [L19] COND TRUE SIZE > 1 && SIZE < MAX [L21] int i; [L22] int *a = malloc(sizeof(int)*SIZE); [L24] i = 0 VAL [MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [MAX=100000, SIZE=2] [L24] COND FALSE !(i < SIZE) VAL [MAX=100000, SIZE=2] [L29] COND FALSE !(SIZE % 2 != 0) [L6] COND FALSE !(!cond) VAL [MAX=100000, SIZE=2] [L32] i = 1 VAL [MAX=100000, SIZE=2] [L32] COND TRUE i <= SIZE/2 [L34] EXPR a[2*i-2] VAL [MAX=100000, SIZE=2] [L34] COND FALSE !(a[2*i-2] > i) [L38] EXPR a[2*i-1] VAL [MAX=100000, SIZE=2] [L38] COND TRUE a[2*i-1] > i [L40] a[2*i-1] = 2*i-1 VAL [MAX=100000, SIZE=2] [L32] i++ VAL [MAX=100000, SIZE=2] [L32] COND FALSE !(i <= SIZE/2) VAL [MAX=100000, SIZE=2] [L44] i = 0 VAL [MAX=100000, SIZE=2] [L44] COND TRUE i < SIZE [L46] a[i] [L8] COND TRUE !(cond) VAL [MAX=100000, SIZE=2] [L3] __assert_fail("0", "skippedu.c", 3, "reach_error") VAL [MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 105 SDtfs, 188 SDslu, 121 SDs, 0 SdLazy, 289 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 37 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 131 NumberOfCodeBlocks, 131 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 7928 SizeOfPredicates, 10 NumberOfNonLiveVariables, 185 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...