./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn5f.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/ifeqn5f.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 9a6037c76b46b0da4af31997de1947f2fadc4b09 ..................................................................................................................................................................................................................................................................................................................................................... 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 22:12:45,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:12:45,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:12:45,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:12:45,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:12:45,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:12:45,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:12:45,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:12:45,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:12:45,921 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:12:45,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:12:45,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:12:45,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:12:45,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:12:45,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:12:45,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:12:45,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:12:45,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:12:45,939 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:12:45,942 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:12:45,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:12:45,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:12:45,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:12:45,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:12:45,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:12:45,958 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:12:45,958 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:12:45,959 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:12:45,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:12:45,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:12:45,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:12:45,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:12:45,965 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:12:45,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:12:45,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:12:45,967 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:12:45,968 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:12:45,968 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:12:45,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:12:45,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:12:45,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:12:45,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:12:45,999 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:12:45,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:12:46,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:12:46,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:12:46,001 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:12:46,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:12:46,001 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:12:46,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:12:46,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:12:46,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:12:46,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:12:46,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:12:46,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:12:46,003 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:12:46,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:12:46,004 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:12:46,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:12:46,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:12:46,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:12:46,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:12:46,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:12:46,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:12:46,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:12:46,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:12:46,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:12:46,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:12:46,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:12:46,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:12:46,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:12:46,007 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 -> 9a6037c76b46b0da4af31997de1947f2fadc4b09 [2020-10-19 22:12:46,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:12:46,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:12:46,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:12:46,236 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:12:46,237 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:12:46,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn5f.c [2020-10-19 22:12:46,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4602762/d51e3e018f7b4cfb8efe003d2aa40281/FLAGee0d47fc4 [2020-10-19 22:12:46,896 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:12:46,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn5f.c [2020-10-19 22:12:46,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4602762/d51e3e018f7b4cfb8efe003d2aa40281/FLAGee0d47fc4 [2020-10-19 22:12:47,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c4602762/d51e3e018f7b4cfb8efe003d2aa40281 [2020-10-19 22:12:47,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:12:47,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:12:47,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:12:47,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:12:47,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:12:47,324 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22997cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47, skipping insertion in model container [2020-10-19 22:12:47,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:12:47,356 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:12:47,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:12:47,566 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:12:47,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:12:47,621 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:12:47,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47 WrapperNode [2020-10-19 22:12:47,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:12:47,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:12:47,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:12:47,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:12:47,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:12:47,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:12:47,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:12:47,663 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:12:47,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (1/1) ... [2020-10-19 22:12:47,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:12:47,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:12:47,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:12:47,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:12:47,696 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (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 22:12:47,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:12:47,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:12:47,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:12:47,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:12:47,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:12:47,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:12:47,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:12:48,103 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:12:48,104 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-19 22:12:48,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:12:48 BoogieIcfgContainer [2020-10-19 22:12:48,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:12:48,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:12:48,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:12:48,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:12:48,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:12:47" (1/3) ... [2020-10-19 22:12:48,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d43b7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:12:48, skipping insertion in model container [2020-10-19 22:12:48,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:12:47" (2/3) ... [2020-10-19 22:12:48,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d43b7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:12:48, skipping insertion in model container [2020-10-19 22:12:48,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:12:48" (3/3) ... [2020-10-19 22:12:48,115 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn5f.c [2020-10-19 22:12:48,126 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:12:48,131 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:12:48,142 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:12:48,165 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:12:48,165 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:12:48,165 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:12:48,165 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:12:48,166 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:12:48,166 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:12:48,166 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:12:48,166 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:12:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-19 22:12:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:12:48,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:12:48,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:12:48,188 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:12:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:12:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-10-19 22:12:48,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:12:48,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965650990] [2020-10-19 22:12:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:12:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:12:48,356 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 22:12:48,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965650990] [2020-10-19 22:12:48,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:12:48,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:12:48,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123993782] [2020-10-19 22:12:48,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:12:48,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:12:48,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:12:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:12:48,395 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-10-19 22:12:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:12:48,415 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-10-19 22:12:48,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:12:48,417 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-19 22:12:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:12:48,427 INFO L225 Difference]: With dead ends: 43 [2020-10-19 22:12:48,428 INFO L226 Difference]: Without dead ends: 19 [2020-10-19 22:12:48,431 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 22:12:48,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-19 22:12:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-19 22:12:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-19 22:12:48,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-10-19 22:12:48,470 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-10-19 22:12:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:12:48,471 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-10-19 22:12:48,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:12:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-10-19 22:12:48,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-19 22:12:48,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:12:48,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:12:48,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:12:48,473 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:12:48,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:12:48,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-10-19 22:12:48,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:12:48,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622938850] [2020-10-19 22:12:48,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:12:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:12:48,566 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 22:12:48,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622938850] [2020-10-19 22:12:48,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:12:48,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:12:48,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426453054] [2020-10-19 22:12:48,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:12:48,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:12:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:12:48,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:12:48,571 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-10-19 22:12:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:12:48,681 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-10-19 22:12:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:12:48,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-19 22:12:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:12:48,683 INFO L225 Difference]: With dead ends: 45 [2020-10-19 22:12:48,683 INFO L226 Difference]: Without dead ends: 31 [2020-10-19 22:12:48,684 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 22:12:48,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-19 22:12:48,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-19 22:12:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:12:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-19 22:12:48,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-10-19 22:12:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:12:48,693 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-19 22:12:48,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:12:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-19 22:12:48,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:12:48,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:12:48,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:12:48,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:12:48,704 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:12:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:12:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-10-19 22:12:48,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:12:48,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748349789] [2020-10-19 22:12:48,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:12:48,731 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 22:12:48,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [720781421] [2020-10-19 22:12:48,732 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 22:12:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:12:48,813 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:12:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:12:48,834 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:12:48,868 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:12:48,868 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:12:49,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:12:49,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:12:49 BoogieIcfgContainer [2020-10-19 22:12:49,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:12:49,125 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:12:49,125 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:12:49,126 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:12:49,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:12:48" (3/4) ... [2020-10-19 22:12:49,129 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:12:49,193 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:12:49,194 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:12:49,197 INFO L168 Benchmark]: Toolchain (without parser) took 1882.91 ms. Allocated memory was 43.5 MB in the beginning and 47.2 MB in the end (delta: 3.7 MB). Free memory was 24.2 MB in the beginning and 11.0 MB in the end (delta: 13.2 MB). Peak memory consumption was 16.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:49,198 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 32.5 MB. Free memory was 11.7 MB in the beginning and 11.7 MB in the end (delta: 48.5 kB). Peak memory consumption was 48.5 kB. Max. memory is 14.3 GB. [2020-10-19 22:12:49,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.90 ms. Allocated memory is still 43.5 MB. Free memory was 23.4 MB in the beginning and 25.0 MB in the end (delta: -1.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:49,199 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.88 ms. Allocated memory is still 43.5 MB. Free memory was 25.0 MB in the beginning and 23.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:49,200 INFO L168 Benchmark]: Boogie Preprocessor took 31.11 ms. Allocated memory is still 43.5 MB. Free memory was 23.2 MB in the beginning and 21.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:49,202 INFO L168 Benchmark]: RCFGBuilder took 411.73 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 21.5 MB in the beginning and 23.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:49,203 INFO L168 Benchmark]: TraceAbstraction took 1017.50 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 23.4 MB in the beginning and 14.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:49,203 INFO L168 Benchmark]: Witness Printer took 68.68 ms. Allocated memory is still 47.2 MB. Free memory was 13.9 MB in the beginning and 11.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:12:49,209 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 32.5 MB. Free memory was 11.7 MB in the beginning and 11.7 MB in the end (delta: 48.5 kB). Peak memory consumption was 48.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 303.90 ms. Allocated memory is still 43.5 MB. Free memory was 23.4 MB in the beginning and 25.0 MB in the end (delta: -1.6 MB). Peak memory consumption was 13.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 39.88 ms. Allocated memory is still 43.5 MB. Free memory was 25.0 MB in the beginning and 23.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 31.11 ms. Allocated memory is still 43.5 MB. Free memory was 23.2 MB in the beginning and 21.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * RCFGBuilder took 411.73 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 21.5 MB in the beginning and 23.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1017.50 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 23.4 MB in the beginning and 14.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 11.2 MB. Max. memory is 14.3 GB. * Witness Printer took 68.68 ms. Allocated memory is still 47.2 MB. Free memory was 13.9 MB in the beginning and 11.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i