./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s2iff.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/s2iff.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 a22ecd7dbca86ce676366b458aa720e60c3fd1ca ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 22:16:41,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:16:41,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:16:41,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:16:41,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:16:41,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:16:41,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:16:41,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:16:41,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:16:41,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:16:41,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:16:41,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:16:41,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:16:41,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:16:41,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:16:41,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:16:41,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:16:41,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:16:41,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:16:41,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:16:41,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:16:41,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:16:41,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:16:41,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:16:41,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:16:41,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:16:41,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:16:41,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:16:41,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:16:41,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:16:41,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:16:41,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:16:41,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:16:41,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:16:41,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:16:41,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:16:41,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:16:41,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:16:41,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:16:41,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:16:41,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:16:41,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:16:41,633 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:16:41,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:16:41,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:16:41,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:16:41,636 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:16:41,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:16:41,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:16:41,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:16:41,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:16:41,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:16:41,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:16:41,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:16:41,639 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:16:41,640 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:16:41,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:16:41,640 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:16:41,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:16:41,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:16:41,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:16:41,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:16:41,642 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:16:41,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:16:41,643 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:16:41,643 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:16:41,643 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:16:41,644 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:16:41,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:16:41,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:16:41,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:16:41,645 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 -> a22ecd7dbca86ce676366b458aa720e60c3fd1ca [2020-10-19 22:16:41,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:16:41,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:16:41,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:16:41,885 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:16:41,885 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:16:41,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s2iff.c [2020-10-19 22:16:41,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8c205742/a7d34910bdeb4c52b4efd0659603a4bd/FLAG120b184ff [2020-10-19 22:16:42,423 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:16:42,424 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s2iff.c [2020-10-19 22:16:42,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8c205742/a7d34910bdeb4c52b4efd0659603a4bd/FLAG120b184ff [2020-10-19 22:16:42,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8c205742/a7d34910bdeb4c52b4efd0659603a4bd [2020-10-19 22:16:42,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:16:42,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:16:42,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:16:42,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:16:42,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:16:42,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:16:42" (1/1) ... [2020-10-19 22:16:42,794 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f145087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:42, skipping insertion in model container [2020-10-19 22:16:42,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:16:42" (1/1) ... [2020-10-19 22:16:42,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:16:42,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:16:43,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:16:43,111 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:16:43,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:16:43,152 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:16:43,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43 WrapperNode [2020-10-19 22:16:43,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:16:43,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:16:43,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:16:43,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:16:43,161 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:16:43,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:16:43,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:16:43,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:16:43,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (1/1) ... [2020-10-19 22:16:43,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:16:43,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:16:43,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:16:43,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:16:43,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (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 22:16:43,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:16:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:16:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:16:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:16:43,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:16:43,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:16:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:16:43,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:16:43,553 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:16:43,554 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-19 22:16:43,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:16:43 BoogieIcfgContainer [2020-10-19 22:16:43,556 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:16:43,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:16:43,558 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:16:43,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:16:43,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:16:42" (1/3) ... [2020-10-19 22:16:43,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7946df07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:16:43, skipping insertion in model container [2020-10-19 22:16:43,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:43" (2/3) ... [2020-10-19 22:16:43,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7946df07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:16:43, skipping insertion in model container [2020-10-19 22:16:43,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:16:43" (3/3) ... [2020-10-19 22:16:43,569 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2020-10-19 22:16:43,584 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:16:43,602 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:16:43,633 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:16:43,668 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:16:43,669 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:16:43,669 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:16:43,669 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:16:43,669 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:16:43,669 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:16:43,670 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:16:43,670 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:16:43,688 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-19 22:16:43,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:16:43,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:43,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:43,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:43,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:43,704 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-10-19 22:16:43,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:43,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615718178] [2020-10-19 22:16:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:43,872 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 22:16:43,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615718178] [2020-10-19 22:16:43,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:16:43,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:16:43,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548098111] [2020-10-19 22:16:43,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:16:43,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:43,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:16:43,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:16:43,898 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-19 22:16:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:43,920 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-10-19 22:16:43,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:16:43,922 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-19 22:16:43,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:43,933 INFO L225 Difference]: With dead ends: 35 [2020-10-19 22:16:43,933 INFO L226 Difference]: Without dead ends: 15 [2020-10-19 22:16:43,937 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 22:16:43,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-19 22:16:43,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-19 22:16:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-19 22:16:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-19 22:16:43,982 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-10-19 22:16:43,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:43,983 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-19 22:16:43,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:16:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-19 22:16:43,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:16:43,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:43,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:43,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:16:43,986 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:43,987 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-10-19 22:16:43,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:43,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210064966] [2020-10-19 22:16:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:44,080 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 22:16:44,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210064966] [2020-10-19 22:16:44,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:16:44,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:16:44,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748069257] [2020-10-19 22:16:44,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:16:44,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:44,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:16:44,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:16:44,085 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-19 22:16:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:44,193 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-19 22:16:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:16:44,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 22:16:44,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:44,195 INFO L225 Difference]: With dead ends: 28 [2020-10-19 22:16:44,195 INFO L226 Difference]: Without dead ends: 20 [2020-10-19 22:16:44,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:16:44,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-19 22:16:44,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-19 22:16:44,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 22:16:44,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-19 22:16:44,203 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-10-19 22:16:44,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:44,203 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-19 22:16:44,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:16:44,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-19 22:16:44,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:16:44,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:44,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:44,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:16:44,205 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:44,206 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-10-19 22:16:44,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:44,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59777841] [2020-10-19 22:16:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:44,549 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 22:16:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59777841] [2020-10-19 22:16:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215156143] [2020-10-19 22:16:44,550 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 22:16:44,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-19 22:16:44,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:16:44,717 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 11 treesize of output 7 [2020-10-19 22:16:44,718 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:16:44,731 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:16:44,731 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:16:44,732 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-10-19 22:16:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:16:44,783 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-10-19 22:16:44,784 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:16:44,797 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:16:44,798 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 22:16:44,798 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2020-10-19 22:16:45,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:16:45,115 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:16:45,116 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 1 case distinctions, treesize of input 55 treesize of output 57 [2020-10-19 22:16:45,118 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:16:45,140 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:16:45,160 INFO L545 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-10-19 22:16:45,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:46 [2020-10-19 22:16:45,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:16:45,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:16:45,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:16:45,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:16:45,469 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 22:16:45,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:16:45,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2020-10-19 22:16:45,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114421688] [2020-10-19 22:16:45,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-19 22:16:45,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:45,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-19 22:16:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-19 22:16:45,473 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 16 states. [2020-10-19 22:16:45,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:45,971 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-19 22:16:45,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 22:16:45,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-10-19 22:16:45,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:45,975 INFO L225 Difference]: With dead ends: 35 [2020-10-19 22:16:45,975 INFO L226 Difference]: Without dead ends: 26 [2020-10-19 22:16:45,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-19 22:16:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-19 22:16:45,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-19 22:16:45,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:16:45,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-19 22:16:45,984 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-19 22:16:45,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:45,985 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-19 22:16:45,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-19 22:16:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-19 22:16:45,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:16:45,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:45,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:46,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:16:46,202 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:46,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:46,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2020-10-19 22:16:46,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:46,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387860765] [2020-10-19 22:16:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:16:46,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387860765] [2020-10-19 22:16:46,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43924794] [2020-10-19 22:16:46,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:16:46,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:16:46,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:16:46,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:16:46,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:16:46,374 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 22:16:46,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:16:46,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:16:46,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427971734] [2020-10-19 22:16:46,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:16:46,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:46,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:16:46,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:16:46,377 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-10-19 22:16:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:46,528 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-19 22:16:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:16:46,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-19 22:16:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:46,530 INFO L225 Difference]: With dead ends: 33 [2020-10-19 22:16:46,530 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 22:16:46,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-19 22:16:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 22:16:46,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-19 22:16:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-19 22:16:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-19 22:16:46,537 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-10-19 22:16:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:46,538 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-19 22:16:46,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:16:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-19 22:16:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:16:46,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:46,539 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:46,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:16:46,754 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2020-10-19 22:16:46,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:46,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030492232] [2020-10-19 22:16:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:16:46,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030492232] [2020-10-19 22:16:46,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265068394] [2020-10-19 22:16:46,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:16:46,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 22:16:46,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:16:46,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:16:46,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:16:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 22:16:46,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:16:46,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:16:46,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835272734] [2020-10-19 22:16:46,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:16:46,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:46,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:16:46,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:16:46,919 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2020-10-19 22:16:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:47,028 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-19 22:16:47,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:16:47,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-19 22:16:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:47,029 INFO L225 Difference]: With dead ends: 37 [2020-10-19 22:16:47,029 INFO L226 Difference]: Without dead ends: 25 [2020-10-19 22:16:47,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-19 22:16:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-19 22:16:47,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-19 22:16:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-19 22:16:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-19 22:16:47,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-19 22:16:47,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:47,035 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-19 22:16:47,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:16:47,035 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-19 22:16:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:16:47,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:47,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:47,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:16:47,247 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2020-10-19 22:16:47,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:47,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496437442] [2020-10-19 22:16:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:16:47,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:16:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:16:47,298 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:16:47,345 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:16:47,345 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:16:47,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 22:16:47,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:16:47 BoogieIcfgContainer [2020-10-19 22:16:47,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:16:47,429 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:16:47,429 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:16:47,430 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:16:47,430 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:16:43" (3/4) ... [2020-10-19 22:16:47,434 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:16:47,533 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:16:47,534 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:16:47,535 INFO L168 Benchmark]: Toolchain (without parser) took 4756.69 ms. Allocated memory was 36.2 MB in the beginning and 61.3 MB in the end (delta: 25.2 MB). Free memory was 10.2 MB in the beginning and 23.4 MB in the end (delta: -13.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:47,536 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 35.7 MB. Free memory was 14.5 MB in the beginning and 14.5 MB in the end (delta: 47.2 kB). Peak memory consumption was 47.2 kB. Max. memory is 14.3 GB. [2020-10-19 22:16:47,537 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.66 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 9.4 MB in the beginning and 27.0 MB in the end (delta: -17.6 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:47,537 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.43 ms. Allocated memory is still 44.6 MB. Free memory was 26.8 MB in the beginning and 25.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:47,538 INFO L168 Benchmark]: Boogie Preprocessor took 28.88 ms. Allocated memory is still 44.6 MB. Free memory was 25.1 MB in the beginning and 23.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:47,538 INFO L168 Benchmark]: RCFGBuilder took 334.37 ms. Allocated memory was 44.6 MB in the beginning and 45.6 MB in the end (delta: 1.0 MB). Free memory was 23.6 MB in the beginning and 20.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:47,541 INFO L168 Benchmark]: TraceAbstraction took 3871.62 ms. Allocated memory was 45.6 MB in the beginning and 61.3 MB in the end (delta: 15.7 MB). Free memory was 20.0 MB in the beginning and 26.8 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:47,541 INFO L168 Benchmark]: Witness Printer took 104.45 ms. Allocated memory is still 61.3 MB. Free memory was 26.8 MB in the beginning and 23.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:47,545 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 35.7 MB. Free memory was 14.5 MB in the beginning and 14.5 MB in the end (delta: 47.2 kB). Peak memory consumption was 47.2 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 367.66 ms. Allocated memory was 36.2 MB in the beginning and 44.6 MB in the end (delta: 8.4 MB). Free memory was 9.4 MB in the beginning and 27.0 MB in the end (delta: -17.6 MB). Peak memory consumption was 7.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 38.43 ms. Allocated memory is still 44.6 MB. Free memory was 26.8 MB in the beginning and 25.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 28.88 ms. Allocated memory is still 44.6 MB. Free memory was 25.1 MB in the beginning and 23.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 334.37 ms. Allocated memory was 44.6 MB in the beginning and 45.6 MB in the end (delta: 1.0 MB). Free memory was 23.6 MB in the beginning and 20.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 12.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3871.62 ms. Allocated memory was 45.6 MB in the beginning and 61.3 MB in the end (delta: 15.7 MB). Free memory was 20.0 MB in the beginning and 26.8 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. * Witness Printer took 104.45 ms. Allocated memory is still 61.3 MB. Free memory was 26.8 MB in the beginning and 23.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 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 sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i