./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3764edd0ff82cc2ff392719542cb80230c47723 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn3f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3764edd0ff82cc2ff392719542cb80230c47723 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 14:08:59,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 14:08:59,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 14:08:59,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 14:08:59,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 14:08:59,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 14:08:59,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 14:08:59,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 14:08:59,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 14:08:59,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 14:08:59,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 14:08:59,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 14:08:59,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 14:08:59,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 14:08:59,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 14:08:59,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 14:08:59,566 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 14:08:59,567 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 14:08:59,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 14:08:59,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 14:08:59,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 14:08:59,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 14:08:59,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 14:08:59,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 14:08:59,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 14:08:59,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 14:08:59,580 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 14:08:59,581 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 14:08:59,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 14:08:59,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 14:08:59,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 14:08:59,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 14:08:59,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 14:08:59,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 14:08:59,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 14:08:59,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 14:08:59,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 14:08:59,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 14:08:59,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 14:08:59,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 14:08:59,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 14:08:59,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 14:08:59,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 14:08:59,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 14:08:59,610 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 14:08:59,610 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 14:08:59,611 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 14:08:59,611 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 14:08:59,611 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 14:08:59,611 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 14:08:59,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 14:08:59,612 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 14:08:59,612 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 14:08:59,612 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 14:08:59,612 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 14:08:59,612 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 14:08:59,613 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 14:08:59,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 14:08:59,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 14:08:59,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 14:08:59,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 14:08:59,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 14:08:59,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 14:08:59,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 14:08:59,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 14:08:59,615 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 14:08:59,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 14:08:59,615 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 14:08:59,615 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 14:08:59,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 14:08:59,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 14:08:59,616 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 14:08:59,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 14:08:59,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 14:08:59,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 14:08:59,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 14:08:59,617 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 14:08:59,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 14:08:59,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 14:08:59,617 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 14:08:59,617 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 14:08:59,618 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3764edd0ff82cc2ff392719542cb80230c47723 [2020-12-09 14:08:59,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 14:08:59,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 14:08:59,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 14:08:59,817 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 14:08:59,817 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 14:08:59,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/../../sv-benchmarks/c/array-fpi/ifeqn3f.c [2020-12-09 14:08:59,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data/7540f8efb/0982201cfc73475e8a4c60ecd33e5ae9/FLAG35bb0e3c5 [2020-12-09 14:09:00,222 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 14:09:00,223 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/sv-benchmarks/c/array-fpi/ifeqn3f.c [2020-12-09 14:09:00,228 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data/7540f8efb/0982201cfc73475e8a4c60ecd33e5ae9/FLAG35bb0e3c5 [2020-12-09 14:09:00,237 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data/7540f8efb/0982201cfc73475e8a4c60ecd33e5ae9 [2020-12-09 14:09:00,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 14:09:00,240 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 14:09:00,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 14:09:00,241 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 14:09:00,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 14:09:00,244 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49befae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00, skipping insertion in model container [2020-12-09 14:09:00,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 14:09:00,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 14:09:00,356 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/sv-benchmarks/c/array-fpi/ifeqn3f.c[590,603] [2020-12-09 14:09:00,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:09:00,375 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 14:09:00,384 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/sv-benchmarks/c/array-fpi/ifeqn3f.c[590,603] [2020-12-09 14:09:00,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:09:00,400 INFO L208 MainTranslator]: Completed translation [2020-12-09 14:09:00,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00 WrapperNode [2020-12-09 14:09:00,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 14:09:00,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 14:09:00,401 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 14:09:00,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 14:09:00,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 14:09:00,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 14:09:00,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 14:09:00,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 14:09:00,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,443 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... [2020-12-09 14:09:00,446 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 14:09:00,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 14:09:00,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 14:09:00,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 14:09:00,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/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 [2020-12-09 14:09:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 14:09:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 14:09:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 14:09:00,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 14:09:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 14:09:00,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 14:09:00,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 14:09:00,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 14:09:00,815 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 14:09:00,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:00 BoogieIcfgContainer [2020-12-09 14:09:00,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 14:09:00,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 14:09:00,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 14:09:00,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 14:09:00,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:09:00" (1/3) ... [2020-12-09 14:09:00,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c77c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:09:00, skipping insertion in model container [2020-12-09 14:09:00,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:00" (2/3) ... [2020-12-09 14:09:00,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c77c37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:09:00, skipping insertion in model container [2020-12-09 14:09:00,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:00" (3/3) ... [2020-12-09 14:09:00,823 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-12-09 14:09:00,832 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 14:09:00,835 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 14:09:00,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 14:09:00,858 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 14:09:00,858 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 14:09:00,858 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 14:09:00,858 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 14:09:00,858 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 14:09:00,858 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 14:09:00,859 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 14:09:00,859 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 14:09:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 14:09:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 14:09:00,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:00,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:00,872 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:00,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:00,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2020-12-09 14:09:00,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:00,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447158195] [2020-12-09 14:09:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:00,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 14:09:00,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219277341] [2020-12-09 14:09:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/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 [2020-12-09 14:09:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:01,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 14:09:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:01,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:09:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:01,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447158195] [2020-12-09 14:09:01,106 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:09:01,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219277341] [2020-12-09 14:09:01,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:01,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 14:09:01,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47719421] [2020-12-09 14:09:01,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 14:09:01,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:09:01,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 14:09:01,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 14:09:01,126 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-09 14:09:01,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:01,157 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2020-12-09 14:09:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 14:09:01,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 14:09:01,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:01,163 INFO L225 Difference]: With dead ends: 20 [2020-12-09 14:09:01,163 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 14:09:01,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 14:09:01,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 14:09:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 14:09:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 14:09:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-09 14:09:01,186 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-12-09 14:09:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:01,186 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-09 14:09:01,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 14:09:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-09 14:09:01,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 14:09:01,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:01,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:01,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 14:09:01,388 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:01,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2020-12-09 14:09:01,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:01,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489299696] [2020-12-09 14:09:01,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:01,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 14:09:01,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675223433] [2020-12-09 14:09:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/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 [2020-12-09 14:09:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 14:09:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:09:01,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:09:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:09:01,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489299696] [2020-12-09 14:09:01,469 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:09:01,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675223433] [2020-12-09 14:09:01,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:01,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-12-09 14:09:01,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625957340] [2020-12-09 14:09:01,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 14:09:01,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:09:01,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 14:09:01,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 14:09:01,471 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2020-12-09 14:09:01,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:01,497 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 14:09:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 14:09:01,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 14:09:01,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:01,498 INFO L225 Difference]: With dead ends: 21 [2020-12-09 14:09:01,498 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 14:09:01,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 14:09:01,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 14:09:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2020-12-09 14:09:01,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 14:09:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-09 14:09:01,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-09 14:09:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:01,502 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-09 14:09:01,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 14:09:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-09 14:09:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 14:09:01,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:01,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:01,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:09:01,704 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:01,706 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2020-12-09 14:09:01,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:01,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851149115] [2020-12-09 14:09:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:01,780 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 14:09:01,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692126678] [2020-12-09 14:09:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/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 [2020-12-09 14:09:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:01,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 14:09:01,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:02,004 INFO L382 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 [2020-12-09 14:09:02,005 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:09:02,007 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:09:02,008 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 14:09:02,008 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 14:09:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:02,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:09:02,070 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:09:02,086 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:09:02,086 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2020-12-09 14:09:02,088 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 14:09:02,090 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_2], 2=[v_arrayElimCell_1]} [2020-12-09 14:09:02,098 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~a~0.base Int) (ULTIMATE.start_main_~b~0.base Int) (|#memory_int| (Array Int (Array Int Int))) (ULTIMATE.start_main_~a~0.offset Int) (ULTIMATE.start_main_~b~0.offset Int)) (= (select (let ((.cse0 (select |#memory_int| ULTIMATE.start_main_~b~0.base)) (.cse1 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse0 (+ .cse1 ULTIMATE.start_main_~b~0.offset) (+ (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset .cse1 (- 8))) (select .cse0 (+ .cse1 ULTIMATE.start_main_~b~0.offset (- 8)))))) ULTIMATE.start_main_~b~0.offset) 1)) (= c_ULTIMATE.start_main_~i~0 0)) is different from false [2020-12-09 14:09:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2020-12-09 14:09:02,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851149115] [2020-12-09 14:09:02,107 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:09:02,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692126678] [2020-12-09 14:09:02,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615718426] [2020-12-09 14:09:02,122 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 14:09:02,122 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:09:02,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:09:02,130 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:09:02,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:09:02,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:09:02,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:09:02,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:09:02,987 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 14:09:03,112 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-12-09 14:09:03,241 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-09 14:09:03,380 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-09 14:09:03,529 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:09:03,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 14:09:03,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2020-12-09 14:09:03,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368313300] [2020-12-09 14:09:03,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 14:09:03,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:09:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 14:09:03,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=164, Unknown=1, NotChecked=26, Total=240 [2020-12-09 14:09:03,531 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2020-12-09 14:09:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:03,718 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-09 14:09:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 14:09:03,719 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2020-12-09 14:09:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:03,719 INFO L225 Difference]: With dead ends: 28 [2020-12-09 14:09:03,719 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 14:09:03,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=429, Unknown=1, NotChecked=44, Total=600 [2020-12-09 14:09:03,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 14:09:03,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 13. [2020-12-09 14:09:03,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 14:09:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-09 14:09:03,724 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-12-09 14:09:03,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:03,725 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-09 14:09:03,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 14:09:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-09 14:09:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 14:09:03,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:03,725 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:03,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:09:03,927 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:03,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:03,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1550353687, now seen corresponding path program 1 times [2020-12-09 14:09:03,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:03,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999567527] [2020-12-09 14:09:03,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:03,977 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 14:09:03,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681681737] [2020-12-09 14:09:03,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:09:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 14:09:04,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:09:04,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:09:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:09:04,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999567527] [2020-12-09 14:09:04,176 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:09:04,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681681737] [2020-12-09 14:09:04,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603705862] [2020-12-09 14:09:04,179 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 14:09:04,179 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:09:04,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:09:04,180 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:09:04,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:09:04,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:09:04,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:09:04,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 14:09:04,822 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 14:09:04,983 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-09 14:09:05,338 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-09 14:09:05,478 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-09 14:09:05,479 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:09:05,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 14:09:05,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-09 14:09:05,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764303796] [2020-12-09 14:09:05,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 14:09:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 14:09:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 14:09:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-09 14:09:05,481 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 9 states. [2020-12-09 14:09:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:05,545 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-09 14:09:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 14:09:05,545 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-09 14:09:05,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:05,546 INFO L225 Difference]: With dead ends: 35 [2020-12-09 14:09:05,546 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 14:09:05,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-12-09 14:09:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 14:09:05,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-12-09 14:09:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 14:09:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-09 14:09:05,549 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-12-09 14:09:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:05,549 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-09 14:09:05,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 14:09:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-09 14:09:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 14:09:05,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:05,549 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:05,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:09:05,751 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:05,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:05,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1712003936, now seen corresponding path program 2 times [2020-12-09 14:09:05,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 14:09:05,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211168029] [2020-12-09 14:09:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 14:09:05,782 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 14:09:05,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132691906] [2020-12-09 14:09:05,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:09:05,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 14:09:05,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 14:09:05,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-09 14:09:05,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:06,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:09:06,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211168029] [2020-12-09 14:09:06,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 14:09:06,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132691906] [2020-12-09 14:09:06,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 14:09:06,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758667159] [2020-12-09 14:09:06,354 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 14:09:06,354 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 14:09:06,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 14:09:06,354 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 14:09:06,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 14:09:06,359 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6d264083 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:568) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:441) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 14:09:06,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:06,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 14:09:06,361 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 14:09:06,361 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 14:09:06,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:09:06,574 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 14:09:06,575 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 14:09:06,575 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 14:09:06,576 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 14:09:06,576 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 14:09:06,577 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 14:09:06,577 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 14:09:06,577 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 14:09:06,578 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 14:09:06,578 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 14:09:06,579 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 14:09:06,579 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 14:09:06,579 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 14:09:06,580 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 14:09:06,611 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 14:09:06,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 02:09:06 BoogieIcfgContainer [2020-12-09 14:09:06,612 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 14:09:06,612 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 14:09:06,612 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 14:09:06,613 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 14:09:06,613 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:00" (3/4) ... [2020-12-09 14:09:06,616 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 14:09:06,616 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 14:09:06,617 INFO L168 Benchmark]: Toolchain (without parser) took 6376.52 ms. Allocated memory was 111.1 MB in the beginning and 184.5 MB in the end (delta: 73.4 MB). Free memory was 80.6 MB in the beginning and 159.9 MB in the end (delta: -79.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:06,617 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 111.1 MB. Free memory is still 88.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:06,618 INFO L168 Benchmark]: CACSL2BoogieTranslator took 159.64 ms. Allocated memory is still 111.1 MB. Free memory was 80.4 MB in the beginning and 70.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:06,618 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.34 ms. Allocated memory is still 111.1 MB. Free memory was 70.3 MB in the beginning and 68.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:06,618 INFO L168 Benchmark]: Boogie Preprocessor took 18.80 ms. Allocated memory is still 111.1 MB. Free memory was 68.7 MB in the beginning and 67.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:06,619 INFO L168 Benchmark]: RCFGBuilder took 370.52 ms. Allocated memory is still 111.1 MB. Free memory was 67.4 MB in the beginning and 70.0 MB in the end (delta: -2.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:06,619 INFO L168 Benchmark]: TraceAbstraction took 5793.97 ms. Allocated memory was 111.1 MB in the beginning and 184.5 MB in the end (delta: 73.4 MB). Free memory was 69.2 MB in the beginning and 159.9 MB in the end (delta: -90.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:06,619 INFO L168 Benchmark]: Witness Printer took 3.74 ms. Allocated memory is still 184.5 MB. Free memory is still 159.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:06,621 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 111.1 MB. Free memory is still 88.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 159.64 ms. Allocated memory is still 111.1 MB. Free memory was 80.4 MB in the beginning and 70.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.34 ms. Allocated memory is still 111.1 MB. Free memory was 70.3 MB in the beginning and 68.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.80 ms. Allocated memory is still 111.1 MB. Free memory was 68.7 MB in the beginning and 67.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 370.52 ms. Allocated memory is still 111.1 MB. Free memory was 67.4 MB in the beginning and 70.0 MB in the end (delta: -2.5 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5793.97 ms. Allocated memory was 111.1 MB in the beginning and 184.5 MB in the end (delta: 73.4 MB). Free memory was 69.2 MB in the beginning and 159.9 MB in the end (delta: -90.7 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.1 GB. * Witness Printer took 3.74 ms. Allocated memory is still 184.5 MB. Free memory is still 159.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND TRUE !cond [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan 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 -> Taipan 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 -> c3764edd0ff82cc2ff392719542cb80230c47723 [2020-12-09 14:09:08,529 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 14:09:08,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 14:09:08,547 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 14:09:08,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 14:09:08,549 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 14:09:08,549 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/../../sv-benchmarks/c/array-fpi/ifeqn3f.c [2020-12-09 14:09:08,592 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data/7eb2f7b7d/ee7b9d35403041019fb996858ca8b908/FLAG11f4e665e [2020-12-09 14:09:08,994 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 14:09:08,994 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/sv-benchmarks/c/array-fpi/ifeqn3f.c [2020-12-09 14:09:09,000 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data/7eb2f7b7d/ee7b9d35403041019fb996858ca8b908/FLAG11f4e665e [2020-12-09 14:09:09,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/data/7eb2f7b7d/ee7b9d35403041019fb996858ca8b908 [2020-12-09 14:09:09,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 14:09:09,012 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 14:09:09,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 14:09:09,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 14:09:09,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 14:09:09,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eb1e70c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09, skipping insertion in model container [2020-12-09 14:09:09,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 14:09:09,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 14:09:09,129 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/sv-benchmarks/c/array-fpi/ifeqn3f.c[590,603] [2020-12-09 14:09:09,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:09:09,160 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 14:09:09,179 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/sv-benchmarks/c/array-fpi/ifeqn3f.c[590,603] [2020-12-09 14:09:09,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 14:09:09,196 INFO L208 MainTranslator]: Completed translation [2020-12-09 14:09:09,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09 WrapperNode [2020-12-09 14:09:09,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 14:09:09,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 14:09:09,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 14:09:09,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 14:09:09,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 14:09:09,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 14:09:09,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 14:09:09,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 14:09:09,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... [2020-12-09 14:09:09,245 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 14:09:09,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 14:09:09,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 14:09:09,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 14:09:09,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/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 [2020-12-09 14:09:09,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 14:09:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 14:09:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2020-12-09 14:09:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 14:09:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 14:09:09,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 14:09:09,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2020-12-09 14:09:09,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 14:09:09,582 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 14:09:09,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:09 BoogieIcfgContainer [2020-12-09 14:09:09,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 14:09:09,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 14:09:09,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 14:09:09,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 14:09:09,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:09:09" (1/3) ... [2020-12-09 14:09:09,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bda8fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:09:09, skipping insertion in model container [2020-12-09 14:09:09,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:09:09" (2/3) ... [2020-12-09 14:09:09,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36bda8fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:09:09, skipping insertion in model container [2020-12-09 14:09:09,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:09" (3/3) ... [2020-12-09 14:09:09,591 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-12-09 14:09:09,605 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 14:09:09,608 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 14:09:09,616 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 14:09:09,634 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 14:09:09,634 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 14:09:09,634 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 14:09:09,634 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 14:09:09,634 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 14:09:09,634 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 14:09:09,634 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 14:09:09,635 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 14:09:09,643 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-09 14:09:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 14:09:09,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:09,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:09,648 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2020-12-09 14:09:09,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:09:09,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377266377] [2020-12-09 14:09:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 14:09:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:09,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 14:09:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:09,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:09,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:09:09,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377266377] [2020-12-09 14:09:09,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:09,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 14:09:09,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754323914] [2020-12-09 14:09:09,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 14:09:09,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:09:09,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 14:09:09,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 14:09:09,789 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-09 14:09:09,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:09,801 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2020-12-09 14:09:09,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 14:09:09,802 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-09 14:09:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:09,808 INFO L225 Difference]: With dead ends: 42 [2020-12-09 14:09:09,808 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 14:09:09,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 14:09:09,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 14:09:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-09 14:09:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 14:09:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-09 14:09:09,831 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2020-12-09 14:09:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:09,832 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-09 14:09:09,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 14:09:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-09 14:09:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 14:09:09,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:09,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:10,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 14:09:10,033 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2020-12-09 14:09:10,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:09:10,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911441457] [2020-12-09 14:09:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 14:09:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 14:09:10,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:10,178 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:09:10,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911441457] [2020-12-09 14:09:10,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:10,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 14:09:10,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990546497] [2020-12-09 14:09:10,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 14:09:10,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:09:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 14:09:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 14:09:10,181 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-09 14:09:10,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:10,332 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2020-12-09 14:09:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 14:09:10,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 14:09:10,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:10,334 INFO L225 Difference]: With dead ends: 45 [2020-12-09 14:09:10,334 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 14:09:10,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 14:09:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 14:09:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-12-09 14:09:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 14:09:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 14:09:10,340 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-09 14:09:10,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:10,340 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 14:09:10,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 14:09:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 14:09:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 14:09:10,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:10,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:10,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 14:09:10,542 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2020-12-09 14:09:10,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:09:10,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1971913975] [2020-12-09 14:09:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 14:09:10,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:10,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 14:09:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:10,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:10,720 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2020-12-09 14:09:10,721 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:09:10,728 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:09:10,729 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 14:09:10,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2020-12-09 14:09:10,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 14:09:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 14:09:10,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:09:10,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1971913975] [2020-12-09 14:09:10,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:10,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 14:09:10,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238094761] [2020-12-09 14:09:10,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 14:09:10,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:09:10,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 14:09:10,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-09 14:09:10,803 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-12-09 14:09:10,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:10,989 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-12-09 14:09:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 14:09:10,989 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-09 14:09:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:10,990 INFO L225 Difference]: With dead ends: 40 [2020-12-09 14:09:10,990 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 14:09:10,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-09 14:09:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 14:09:10,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-12-09 14:09:10,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 14:09:10,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-09 14:09:10,995 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-12-09 14:09:10,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:10,995 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-09 14:09:10,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 14:09:10,995 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-09 14:09:10,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 14:09:10,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:10,996 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:11,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 14:09:11,198 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:11,199 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2020-12-09 14:09:11,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:09:11,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265349593] [2020-12-09 14:09:11,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 14:09:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:11,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 14:09:11,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:11,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:09:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:11,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265349593] [2020-12-09 14:09:11,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329918468] [2020-12-09 14:09:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:09:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 14:09:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 14:09:11,725 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 14:09:11,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 14:09:11,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7] total 17 [2020-12-09 14:09:11,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086392563] [2020-12-09 14:09:11,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 14:09:11,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 14:09:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 14:09:11,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-09 14:09:11,726 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2020-12-09 14:09:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 14:09:11,920 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2020-12-09 14:09:11,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 14:09:11,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-09 14:09:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 14:09:11,921 INFO L225 Difference]: With dead ends: 75 [2020-12-09 14:09:11,921 INFO L226 Difference]: Without dead ends: 43 [2020-12-09 14:09:11,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-09 14:09:11,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-09 14:09:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2020-12-09 14:09:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 14:09:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-09 14:09:11,926 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2020-12-09 14:09:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 14:09:11,926 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-09 14:09:11,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 14:09:11,926 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-09 14:09:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-09 14:09:11,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 14:09:11,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 14:09:12,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt [2020-12-09 14:09:12,329 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 14:09:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 14:09:12,331 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2020-12-09 14:09:12,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 14:09:12,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990787802] [2020-12-09 14:09:12,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 14:09:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 14:09:12,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:12,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,496 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2020-12-09 14:09:12,497 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:09:12,507 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:09:12,508 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 14:09:12,508 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:30 [2020-12-09 14:09:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 14:09:12,574 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-09 14:09:12,587 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 14:09:12,587 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 89 [2020-12-09 14:09:12,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 14:09:12,655 INFO L625 ElimStorePlain]: treesize reduction 32, result has 73.3 percent of original size [2020-12-09 14:09:12,657 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 14:09:12,657 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:88 [2020-12-09 14:09:12,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 14:09:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-09 14:09:12,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 14:09:19,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990787802] [2020-12-09 14:09:19,531 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-12-09 14:09:19,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1960554857] [2020-12-09 14:09:19,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt [2020-12-09 14:09:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 14:09:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:19,687 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@36c59abe [2020-12-09 14:09:19,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993811589] [2020-12-09 14:09:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_699f1e17-259c-4144-b044-b579daf9818a/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 14:09:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 14:09:19,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 14:09:19,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 14:09:19,770 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@36c59abe [2020-12-09 14:09:19,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 14:09:19,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 14:09:19,770 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-12-09 14:09:19,770 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 14:09:20,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt [2020-12-09 14:09:20,393 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 14:09:20,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 02:09:20 BoogieIcfgContainer [2020-12-09 14:09:20,393 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 14:09:20,393 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 14:09:20,393 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 14:09:20,393 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 14:09:20,394 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:09:09" (3/4) ... [2020-12-09 14:09:20,396 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 14:09:20,396 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 14:09:20,397 INFO L168 Benchmark]: Toolchain (without parser) took 11383.83 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 42.1 MB in the beginning and 36.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 27.2 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:20,397 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory is still 43.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:20,398 INFO L168 Benchmark]: CACSL2BoogieTranslator took 183.72 ms. Allocated memory is still 60.8 MB. Free memory was 42.1 MB in the beginning and 43.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:20,398 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.71 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 41.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:20,398 INFO L168 Benchmark]: Boogie Preprocessor took 21.21 ms. Allocated memory is still 60.8 MB. Free memory was 41.9 MB in the beginning and 40.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:20,399 INFO L168 Benchmark]: RCFGBuilder took 338.03 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 40.5 MB in the beginning and 62.6 MB in the end (delta: -22.0 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:20,399 INFO L168 Benchmark]: TraceAbstraction took 10807.59 ms. Allocated memory is still 83.9 MB. Free memory was 62.2 MB in the beginning and 36.7 MB in the end (delta: 25.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2020-12-09 14:09:20,399 INFO L168 Benchmark]: Witness Printer took 2.61 ms. Allocated memory is still 83.9 MB. Free memory is still 36.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 14:09:20,402 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 60.8 MB. Free memory is still 43.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 183.72 ms. Allocated memory is still 60.8 MB. Free memory was 42.1 MB in the beginning and 43.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.71 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 41.9 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.21 ms. Allocated memory is still 60.8 MB. Free memory was 41.9 MB in the beginning and 40.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 338.03 ms. Allocated memory was 60.8 MB in the beginning and 83.9 MB in the end (delta: 23.1 MB). Free memory was 40.5 MB in the beginning and 62.6 MB in the end (delta: -22.0 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10807.59 ms. Allocated memory is still 83.9 MB. Free memory was 62.2 MB in the beginning and 36.7 MB in the end (delta: 25.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * Witness Printer took 2.61 ms. Allocated memory is still 83.9 MB. Free memory is still 36.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 [L31] COND TRUE i