./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s1iff.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/s1iff.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 eec6b2d99ac9a557043cad5fb1ce9cac95211db3 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 22:16:06,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 22:16:06,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 22:16:06,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 22:16:06,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 22:16:06,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 22:16:06,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 22:16:06,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 22:16:06,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 22:16:06,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 22:16:06,813 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 22:16:06,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 22:16:06,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 22:16:06,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 22:16:06,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 22:16:06,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 22:16:06,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 22:16:06,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 22:16:06,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 22:16:06,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 22:16:06,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 22:16:06,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 22:16:06,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 22:16:06,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 22:16:06,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 22:16:06,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 22:16:06,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 22:16:06,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 22:16:06,865 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 22:16:06,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 22:16:06,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 22:16:06,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 22:16:06,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 22:16:06,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 22:16:06,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 22:16:06,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 22:16:06,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 22:16:06,877 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 22:16:06,877 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 22:16:06,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 22:16:06,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 22:16:06,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 22:16:06,911 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 22:16:06,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 22:16:06,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 22:16:06,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 22:16:06,913 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 22:16:06,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 22:16:06,913 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 22:16:06,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 22:16:06,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 22:16:06,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 22:16:06,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 22:16:06,915 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 22:16:06,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 22:16:06,915 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 22:16:06,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 22:16:06,915 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 22:16:06,916 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 22:16:06,916 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 22:16:06,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 22:16:06,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 22:16:06,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 22:16:06,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 22:16:06,917 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 22:16:06,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 22:16:06,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 22:16:06,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 22:16:06,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 22:16:06,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 22:16:06,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 22:16:06,919 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 -> eec6b2d99ac9a557043cad5fb1ce9cac95211db3 [2020-10-19 22:16:07,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 22:16:07,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 22:16:07,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 22:16:07,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 22:16:07,138 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 22:16:07,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s1iff.c [2020-10-19 22:16:07,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/745f5e543/fdeb1b7d8ab34360a876ba71324073a5/FLAGc6d6eac36 [2020-10-19 22:16:07,743 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 22:16:07,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s1iff.c [2020-10-19 22:16:07,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/745f5e543/fdeb1b7d8ab34360a876ba71324073a5/FLAGc6d6eac36 [2020-10-19 22:16:08,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/745f5e543/fdeb1b7d8ab34360a876ba71324073a5 [2020-10-19 22:16:08,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 22:16:08,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 22:16:08,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 22:16:08,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 22:16:08,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 22:16:08,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbf2f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08, skipping insertion in model container [2020-10-19 22:16:08,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 22:16:08,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 22:16:08,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:16:08,432 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 22:16:08,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 22:16:08,474 INFO L208 MainTranslator]: Completed translation [2020-10-19 22:16:08,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08 WrapperNode [2020-10-19 22:16:08,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 22:16:08,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 22:16:08,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 22:16:08,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 22:16:08,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,496 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 22:16:08,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 22:16:08,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 22:16:08,525 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 22:16:08,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,557 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (1/1) ... [2020-10-19 22:16:08,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 22:16:08,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 22:16:08,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 22:16:08,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 22:16:08,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (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 22:16:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 22:16:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 22:16:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 22:16:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 22:16:08,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 22:16:08,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 22:16:08,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 22:16:08,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 22:16:08,933 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 22:16:08,933 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-19 22:16:08,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:16:08 BoogieIcfgContainer [2020-10-19 22:16:08,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 22:16:08,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 22:16:08,936 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 22:16:08,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 22:16:08,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 10:16:08" (1/3) ... [2020-10-19 22:16:08,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748aa475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:16:08, skipping insertion in model container [2020-10-19 22:16:08,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 10:16:08" (2/3) ... [2020-10-19 22:16:08,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748aa475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 10:16:08, skipping insertion in model container [2020-10-19 22:16:08,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:16:08" (3/3) ... [2020-10-19 22:16:08,943 INFO L111 eAbstractionObserver]: Analyzing ICFG s1iff.c [2020-10-19 22:16:08,956 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 22:16:08,964 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 22:16:08,981 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 22:16:09,008 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 22:16:09,008 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 22:16:09,008 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 22:16:09,008 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 22:16:09,009 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 22:16:09,009 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 22:16:09,009 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 22:16:09,009 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 22:16:09,027 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-19 22:16:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:16:09,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:09,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:09,035 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-10-19 22:16:09,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:09,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441159347] [2020-10-19 22:16:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:09,214 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 22:16:09,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441159347] [2020-10-19 22:16:09,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:16:09,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 22:16:09,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958405354] [2020-10-19 22:16:09,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 22:16:09,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:09,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 22:16:09,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 22:16:09,235 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-19 22:16:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:09,257 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-10-19 22:16:09,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 22:16:09,258 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-19 22:16:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:09,269 INFO L225 Difference]: With dead ends: 35 [2020-10-19 22:16:09,269 INFO L226 Difference]: Without dead ends: 15 [2020-10-19 22:16:09,272 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 22:16:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-19 22:16:09,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-19 22:16:09,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-19 22:16:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-10-19 22:16:09,310 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-10-19 22:16:09,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:09,310 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-10-19 22:16:09,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 22:16:09,311 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-10-19 22:16:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 22:16:09,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:09,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:09,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 22:16:09,312 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-10-19 22:16:09,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:09,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66504989] [2020-10-19 22:16:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:09,434 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 22:16:09,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66504989] [2020-10-19 22:16:09,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 22:16:09,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 22:16:09,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732980114] [2020-10-19 22:16:09,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 22:16:09,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 22:16:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 22:16:09,440 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-10-19 22:16:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:09,509 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-10-19 22:16:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 22:16:09,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-19 22:16:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:09,511 INFO L225 Difference]: With dead ends: 28 [2020-10-19 22:16:09,511 INFO L226 Difference]: Without dead ends: 20 [2020-10-19 22:16:09,512 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 22:16:09,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-19 22:16:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-10-19 22:16:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-19 22:16:09,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-19 22:16:09,518 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2020-10-19 22:16:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:09,519 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-19 22:16:09,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 22:16:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-19 22:16:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 22:16:09,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:09,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:09,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 22:16:09,521 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:09,522 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-10-19 22:16:09,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:09,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255593439] [2020-10-19 22:16:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:10,048 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 21 [2020-10-19 22:16:10,230 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 22:16:10,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255593439] [2020-10-19 22:16:10,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227470920] [2020-10-19 22:16:10,232 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 22:16:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-19 22:16:10,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:16:10,476 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 22:16:10,477 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:16:10,487 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 22:16:10,488 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 22:16:10,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:16:10,513 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-10-19 22:16:10,513 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:47, output treesize:39 [2020-10-19 22:16:10,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:16:10,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:16:10,591 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 22:16:10,592 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:16:10,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:16:10,603 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 22:16:10,604 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-19 22:16:10,635 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:16:10,636 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-10-19 22:16:10,636 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:69, output treesize:61 [2020-10-19 22:16:10,690 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:16:10,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:16:11,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 22:16:11,057 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 22:16:11,058 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 22:16:11,060 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 22:16:11,139 INFO L625 ElimStorePlain]: treesize reduction 32, result has 64.4 percent of original size [2020-10-19 22:16:11,152 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 22:16:11,153 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:71, output treesize:58 [2020-10-19 22:16:11,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 22:16:11,450 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 22:16:11,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:16:11,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-10-19 22:16:11,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110031901] [2020-10-19 22:16:11,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-19 22:16:11,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:11,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-19 22:16:11,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-19 22:16:11,454 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 17 states. [2020-10-19 22:16:11,756 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-19 22:16:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:12,297 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-19 22:16:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 22:16:12,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-10-19 22:16:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:12,300 INFO L225 Difference]: With dead ends: 35 [2020-10-19 22:16:12,300 INFO L226 Difference]: Without dead ends: 26 [2020-10-19 22:16:12,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-10-19 22:16:12,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-19 22:16:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-19 22:16:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-19 22:16:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-19 22:16:12,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-19 22:16:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:12,309 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-19 22:16:12,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-19 22:16:12,309 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-19 22:16:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 22:16:12,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:12,310 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:12,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-19 22:16:12,525 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:12,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2020-10-19 22:16:12,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:12,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26188076] [2020-10-19 22:16:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:12,630 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 22:16:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26188076] [2020-10-19 22:16:12,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448235385] [2020-10-19 22:16:12,631 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 22:16:12,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 22:16:12,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:16:12,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:16:12,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:16:12,752 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 22:16:12,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:16:12,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:16:12,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735882857] [2020-10-19 22:16:12,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:16:12,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:12,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:16:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:16:12,754 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-10-19 22:16:12,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:12,894 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-19 22:16:12,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:16:12,895 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-19 22:16:12,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:12,896 INFO L225 Difference]: With dead ends: 33 [2020-10-19 22:16:12,896 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 22:16:12,897 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 22:16:12,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 22:16:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-19 22:16:12,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-19 22:16:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-19 22:16:12,902 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2020-10-19 22:16:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:12,903 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-19 22:16:12,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:16:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-19 22:16:12,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 22:16:12,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:12,904 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:13,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:16:13,116 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:13,116 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2020-10-19 22:16:13,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:13,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133432782] [2020-10-19 22:16:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 22:16:13,183 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 22:16:13,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133432782] [2020-10-19 22:16:13,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151275370] [2020-10-19 22:16:13,184 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 22:16:13,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 22:16:13,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 22:16:13,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 22:16:13,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 22:16:13,280 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 22:16:13,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 22:16:13,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-19 22:16:13,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189754491] [2020-10-19 22:16:13,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 22:16:13,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 22:16:13,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 22:16:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-19 22:16:13,283 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 10 states. [2020-10-19 22:16:13,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 22:16:13,381 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-19 22:16:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 22:16:13,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-19 22:16:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 22:16:13,383 INFO L225 Difference]: With dead ends: 37 [2020-10-19 22:16:13,383 INFO L226 Difference]: Without dead ends: 25 [2020-10-19 22:16:13,384 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 22:16:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-19 22:16:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-10-19 22:16:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-19 22:16:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-19 22:16:13,389 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2020-10-19 22:16:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 22:16:13,390 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-19 22:16:13,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 22:16:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-19 22:16:13,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 22:16:13,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 22:16:13,391 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 22:16:13,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 22:16:13,602 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 22:16:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 22:16:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2020-10-19 22:16:13,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 22:16:13,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017995132] [2020-10-19 22:16:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 22:16:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:16:13,624 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:16:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 22:16:13,646 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 22:16:13,669 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 22:16:13,669 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 22:16:13,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 22:16:13,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 10:16:13 BoogieIcfgContainer [2020-10-19 22:16:13,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 22:16:13,720 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 22:16:13,720 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 22:16:13,720 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 22:16:13,721 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 10:16:08" (3/4) ... [2020-10-19 22:16:13,723 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 22:16:13,784 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 22:16:13,784 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 22:16:13,786 INFO L168 Benchmark]: Toolchain (without parser) took 5624.85 ms. Allocated memory was 41.9 MB in the beginning and 64.0 MB in the end (delta: 22.0 MB). Free memory was 19.8 MB in the beginning and 42.8 MB in the end (delta: -22.9 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-19 22:16:13,787 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 7.8 MB in the beginning and 7.8 MB in the end (delta: 43.9 kB). Peak memory consumption was 43.9 kB. Max. memory is 14.3 GB. [2020-10-19 22:16:13,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.62 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 18.9 MB in the beginning and 18.4 MB in the end (delta: 586.6 kB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:13,788 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.69 ms. Allocated memory is still 42.5 MB. Free memory was 18.4 MB in the beginning and 16.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:13,789 INFO L168 Benchmark]: Boogie Preprocessor took 37.06 ms. Allocated memory is still 42.5 MB. Free memory was 16.6 MB in the beginning and 15.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:13,789 INFO L168 Benchmark]: RCFGBuilder took 372.91 ms. Allocated memory was 42.5 MB in the beginning and 45.1 MB in the end (delta: 2.6 MB). Free memory was 15.0 MB in the beginning and 16.8 MB in the end (delta: -1.8 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:13,790 INFO L168 Benchmark]: TraceAbstraction took 4783.03 ms. Allocated memory was 45.1 MB in the beginning and 64.0 MB in the end (delta: 18.9 MB). Free memory was 16.3 MB in the beginning and 45.7 MB in the end (delta: -29.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:13,791 INFO L168 Benchmark]: Witness Printer took 64.65 ms. Allocated memory is still 64.0 MB. Free memory was 45.7 MB in the beginning and 42.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-19 22:16:13,795 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 31.5 MB. Free memory was 7.8 MB in the beginning and 7.8 MB in the end (delta: 43.9 kB). Peak memory consumption was 43.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 308.62 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 18.9 MB in the beginning and 18.4 MB in the end (delta: 586.6 kB). Peak memory consumption was 9.5 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 48.69 ms. Allocated memory is still 42.5 MB. Free memory was 18.4 MB in the beginning and 16.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 37.06 ms. Allocated memory is still 42.5 MB. Free memory was 16.6 MB in the beginning and 15.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 372.91 ms. Allocated memory was 42.5 MB in the beginning and 45.1 MB in the end (delta: 2.6 MB). Free memory was 15.0 MB in the beginning and 16.8 MB in the end (delta: -1.8 MB). Peak memory consumption was 5.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4783.03 ms. Allocated memory was 45.1 MB in the beginning and 64.0 MB in the end (delta: 18.9 MB). Free memory was 16.3 MB in the beginning and 45.7 MB in the end (delta: -29.4 MB). Peak memory consumption was 24.1 MB. Max. memory is 14.3 GB. * Witness Printer took 64.65 ms. Allocated memory is still 64.0 MB. Free memory was 45.7 MB in the beginning and 42.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i