./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/eqn3f.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 3c4f39de7d4cdbe0c9103e2c499bf48f3ddaeb30 ........................................................................................................................................................................................................................................................................................................ 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 0.2.0-5485861 [2020-10-25 19:25:53,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:25:53,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:25:53,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:25:53,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:25:53,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:25:53,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:25:53,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:25:53,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:25:53,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:25:53,449 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:25:53,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:25:53,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:25:53,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:25:53,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:25:53,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:25:53,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:25:53,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:25:53,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:25:53,471 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:25:53,473 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:25:53,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:25:53,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:25:53,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:25:53,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:25:53,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:25:53,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:25:53,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:25:53,489 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:25:53,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:25:53,491 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:25:53,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:25:53,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:25:53,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:25:53,495 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:25:53,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:25:53,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:25:53,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:25:53,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:25:53,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:25:53,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:25:53,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:25:53,557 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:25:53,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:25:53,561 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:25:53,561 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:25:53,562 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:25:53,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:25:53,562 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:25:53,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:25:53,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:25:53,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:25:53,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:25:53,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:25:53,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:25:53,565 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:25:53,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:25:53,566 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:25:53,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:25:53,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:25:53,567 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:25:53,567 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:25:53,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:25:53,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:25:53,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:25:53,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:25:53,568 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:25:53,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:25:53,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:25:53,569 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:25:53,569 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:25:53,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c4f39de7d4cdbe0c9103e2c499bf48f3ddaeb30 [2020-10-25 19:25:53,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:25:54,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:25:54,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:25:54,020 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:25:54,021 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:25:54,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn3f.c [2020-10-25 19:25:54,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e218f3b04/8be541d9855c4ae28577a430f752da01/FLAG332e4f2ab [2020-10-25 19:25:54,629 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:25:54,630 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn3f.c [2020-10-25 19:25:54,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e218f3b04/8be541d9855c4ae28577a430f752da01/FLAG332e4f2ab [2020-10-25 19:25:54,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e218f3b04/8be541d9855c4ae28577a430f752da01 [2020-10-25 19:25:54,994 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:25:55,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:25:55,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:25:55,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:25:55,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:25:55,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:25:54" (1/1) ... [2020-10-25 19:25:55,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e344c4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55, skipping insertion in model container [2020-10-25 19:25:55,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:25:54" (1/1) ... [2020-10-25 19:25:55,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:25:55,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:25:55,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:25:55,293 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:25:55,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:25:55,358 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:25:55,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55 WrapperNode [2020-10-25 19:25:55,360 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:25:55,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:25:55,362 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:25:55,362 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:25:55,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:25:55,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:25:55,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:25:55,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:25:55,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... [2020-10-25 19:25:55,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:25:55,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:25:55,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:25:55,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:25:55,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:25:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:25:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:25:55,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:25:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 19:25:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:25:55,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:25:55,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:25:55,842 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:25:55,843 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-25 19:25:55,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:25:55 BoogieIcfgContainer [2020-10-25 19:25:55,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:25:55,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:25:55,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:25:55,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:25:55,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:25:54" (1/3) ... [2020-10-25 19:25:55,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4c3eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:25:55, skipping insertion in model container [2020-10-25 19:25:55,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:25:55" (2/3) ... [2020-10-25 19:25:55,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a4c3eca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:25:55, skipping insertion in model container [2020-10-25 19:25:55,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:25:55" (3/3) ... [2020-10-25 19:25:55,861 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn3f.c [2020-10-25 19:25:55,874 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:25:55,879 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:25:55,893 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:25:55,933 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:25:55,934 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:25:55,934 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:25:55,934 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:25:55,934 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:25:55,934 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:25:55,934 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:25:55,935 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:25:55,964 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-25 19:25:55,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 19:25:55,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:25:55,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:25:55,972 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:25:55,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:25:55,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2020-10-25 19:25:56,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:25:56,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020588754] [2020-10-25 19:25:56,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:25:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:25:56,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:25:56,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020588754] [2020-10-25 19:25:56,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:25:56,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:25:56,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068396872] [2020-10-25 19:25:56,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:25:56,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:25:56,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:25:56,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:25:56,311 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-10-25 19:25:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:25:56,338 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2020-10-25 19:25:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:25:56,339 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-25 19:25:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:25:56,350 INFO L225 Difference]: With dead ends: 39 [2020-10-25 19:25:56,350 INFO L226 Difference]: Without dead ends: 17 [2020-10-25 19:25:56,354 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 [2020-10-25 19:25:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-25 19:25:56,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-25 19:25:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-25 19:25:56,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-25 19:25:56,409 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-10-25 19:25:56,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:25:56,410 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-25 19:25:56,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:25:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-25 19:25:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 19:25:56,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:25:56,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:25:56,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:25:56,414 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:25:56,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:25:56,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2020-10-25 19:25:56,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:25:56,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567056361] [2020-10-25 19:25:56,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:25:56,490 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-25 19:25:56,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034085900] [2020-10-25 19:25:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 19:25:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:25:56,609 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:25:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:25:56,639 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:25:56,675 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:25:56,675 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:25:56,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-25 19:25:56,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:25:56 BoogieIcfgContainer [2020-10-25 19:25:56,944 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:25:56,945 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:25:56,945 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:25:56,945 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:25:56,946 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:25:55" (3/4) ... [2020-10-25 19:25:56,948 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:25:56,997 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:25:56,997 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:25:56,999 INFO L168 Benchmark]: Toolchain (without parser) took 2000.94 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 25.4 MB in the beginning and 38.8 MB in the end (delta: -13.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:25:57,000 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 39.8 MB. Free memory was 26.1 MB in the beginning and 26.1 MB in the end (delta: 17.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:25:57,001 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.11 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 26.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:25:57,002 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.67 ms. Allocated memory is still 48.2 MB. Free memory was 26.1 MB in the beginning and 24.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:25:57,003 INFO L168 Benchmark]: Boogie Preprocessor took 55.65 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 23.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:25:57,004 INFO L168 Benchmark]: RCFGBuilder took 348.57 ms. Allocated memory is still 48.2 MB. Free memory was 23.2 MB in the beginning and 20.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:25:57,005 INFO L168 Benchmark]: TraceAbstraction took 1090.46 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 32.0 MB in the beginning and 41.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2020-10-25 19:25:57,005 INFO L168 Benchmark]: Witness Printer took 52.47 ms. Allocated memory is still 58.7 MB. Free memory was 41.3 MB in the beginning and 38.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:25:57,010 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 39.8 MB. Free memory was 26.1 MB in the beginning and 26.1 MB in the end (delta: 17.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 348.11 ms. Allocated memory is still 48.2 MB. Free memory was 24.8 MB in the beginning and 26.1 MB in the end (delta: -1.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.67 ms. Allocated memory is still 48.2 MB. Free memory was 26.1 MB in the beginning and 24.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.65 ms. Allocated memory is still 48.2 MB. Free memory was 24.5 MB in the beginning and 23.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 348.57 ms. Allocated memory is still 48.2 MB. Free memory was 23.2 MB in the beginning and 20.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1090.46 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 32.0 MB in the beginning and 41.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. * Witness Printer took 52.47 ms. Allocated memory is still 58.7 MB. Free memory was 41.3 MB in the beginning and 38.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 6 [L32] b[0] = 10 [L34] i=1 VAL [N=1] [L34] COND FALSE !(i