./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn2.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_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI --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 d20f6aec4b57847edb8f89ecab5891521e565e39 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI --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 d20f6aec4b57847edb8f89ecab5891521e565e39 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:32:33,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:32:33,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:32:33,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:32:33,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:32:33,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:32:33,341 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:32:33,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:32:33,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:32:33,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:32:33,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:32:33,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:32:33,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:32:33,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:32:33,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:32:33,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:32:33,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:32:33,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:32:33,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:32:33,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:32:33,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:32:33,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:32:33,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:32:33,400 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:32:33,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:32:33,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:32:33,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:32:33,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:32:33,408 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:32:33,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:32:33,411 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:32:33,412 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:32:33,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:32:33,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:32:33,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:32:33,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:32:33,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:32:33,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:32:33,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:32:33,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:32:33,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:32:33,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:32:33,472 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:32:33,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:32:33,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:32:33,474 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:32:33,475 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:32:33,475 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:32:33,475 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:32:33,475 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:32:33,476 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:32:33,476 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:32:33,477 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:32:33,477 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:32:33,478 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:32:33,478 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:32:33,478 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:32:33,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:32:33,479 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:32:33,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:32:33,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:32:33,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:32:33,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:32:33,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:32:33,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:32:33,481 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:32:33,481 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:32:33,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:32:33,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:32:33,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:32:33,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:32:33,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:32:33,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:33,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:32:33,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:32:33,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:32:33,484 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:32:33,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:32:33,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:32:33,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:32:33,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:32:33,485 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_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d20f6aec4b57847edb8f89ecab5891521e565e39 [2021-10-11 02:32:33,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:33,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:33,840 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:33,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:33,843 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:33,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/ifeqn2.c [2021-10-11 02:32:33,952 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data/c69705135/2f1804962593400b97778afd5dd192d1/FLAG31a95f819 [2021-10-11 02:32:34,408 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:34,409 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/sv-benchmarks/c/array-fpi/ifeqn2.c [2021-10-11 02:32:34,416 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data/c69705135/2f1804962593400b97778afd5dd192d1/FLAG31a95f819 [2021-10-11 02:32:34,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data/c69705135/2f1804962593400b97778afd5dd192d1 [2021-10-11 02:32:34,797 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:34,799 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:34,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:34,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:34,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:34,812 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:34,814 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ede0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:34, skipping insertion in model container [2021-10-11 02:32:34,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:34" (1/1) ... [2021-10-11 02:32:34,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:34,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:35,013 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2021-10-11 02:32:35,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:35,041 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:35,052 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2021-10-11 02:32:35,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:35,076 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:35,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35 WrapperNode [2021-10-11 02:32:35,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:35,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:35,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:35,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:35,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:35,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:35,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:35,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:35,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,134 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... [2021-10-11 02:32:35,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:35,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:35,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:35,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:35,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:35,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:32:35,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:32:35,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:32:35,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:32:35,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:35,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:35,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:32:35,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:35,791 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:32:35,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:35 BoogieIcfgContainer [2021-10-11 02:32:35,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:35,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:35,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:35,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:35,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:34" (1/3) ... [2021-10-11 02:32:35,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d407a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:35, skipping insertion in model container [2021-10-11 02:32:35,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:35" (2/3) ... [2021-10-11 02:32:35,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d407a81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:35, skipping insertion in model container [2021-10-11 02:32:35,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:35" (3/3) ... [2021-10-11 02:32:35,800 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2021-10-11 02:32:35,812 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:35,814 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:32:35,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:32:35,848 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:35,848 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:32:35,848 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:35,848 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:35,848 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:35,849 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:35,849 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:35,849 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2021-10-11 02:32:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:32:35,866 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:35,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:35,867 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:35,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2021-10-11 02:32:35,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:35,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417915905] [2021-10-11 02:32:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:35,989 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:32:35,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1201997808] [2021-10-11 02:32:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:36,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:32:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:36,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:36,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417915905] [2021-10-11 02:32:36,205 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:36,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201997808] [2021-10-11 02:32:36,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:36,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-11 02:32:36,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759034700] [2021-10-11 02:32:36,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:32:36,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:32:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:36,227 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2021-10-11 02:32:36,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:36,302 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-11 02:32:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:36,304 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:32:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:36,311 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:32:36,311 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 02:32:36,314 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 [2021-10-11 02:32:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 02:32:36,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 02:32:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:32:36,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-11 02:32:36,343 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-11 02:32:36,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:36,343 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-11 02:32:36,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:36,343 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-11 02:32:36,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:32:36,344 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:36,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:36,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-11 02:32:36,554 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2021-10-11 02:32:36,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:36,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334272727] [2021-10-11 02:32:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:36,582 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:32:36,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2095431610] [2021-10-11 02:32:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:32:36,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:36,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:36,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:36,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334272727] [2021-10-11 02:32:36,730 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:36,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095431610] [2021-10-11 02:32:36,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:36,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-11 02:32:36,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520448021] [2021-10-11 02:32:36,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:36,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:36,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:36,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:36,734 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2021-10-11 02:32:36,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:36,785 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:32:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:32:36,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-10-11 02:32:36,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:36,786 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:32:36,787 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:32:36,788 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 [2021-10-11 02:32:36,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:32:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-11 02:32:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:32:36,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:32:36,792 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:32:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:36,792 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:32:36,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:36,792 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:32:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:32:36,793 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:36,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:37,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:37,006 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:37,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:37,007 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2021-10-11 02:32:37,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:37,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94308524] [2021-10-11 02:32:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:37,065 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:32:37,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13656288] [2021-10-11 02:32:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:37,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-11 02:32:37,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:37,251 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 [2021-10-11 02:32:37,252 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:32:37,254 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:32:37,255 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:32:37,255 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2021-10-11 02:32:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:37,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:37,315 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2021-10-11 02:32:37,315 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:32:37,379 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:32:37,380 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:32:37,382 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:32:37,392 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:32:37,434 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:32:37,434 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 44 treesize of output 47 [2021-10-11 02:32:37,436 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:32:37,446 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_2], 2=[v_arrayElimCell_1]} [2021-10-11 02:32:37,477 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse13 (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296)) (.cse14 (mod c_ULTIMATE.start_main_~i~0 4294967296))) (let ((.cse1 (<= .cse14 2147483647)) (.cse7 (<= .cse13 2147483647)) (.cse0 (= c_ULTIMATE.start_main_~i~0 0)) (.cse10 (< 2147483647 .cse14)) (.cse2 (< 2147483647 .cse13))) (and (or .cse0 .cse1 .cse2 (forall ((v_prenex_6 Int) (v_prenex_7 Int) (v_prenex_10 Int) (v_prenex_8 (Array Int (Array Int Int))) (v_prenex_9 Int)) (= (select (let ((.cse3 (select v_prenex_8 v_prenex_6))) (store .cse3 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_10 (- 34359738368)) (let ((.cse4 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_8 v_prenex_7) (+ .cse4 v_prenex_9)) (select .cse3 (+ .cse4 v_prenex_10)))))) v_prenex_10) 1))) (or .cse0 .cse1 (forall ((v_prenex_15 Int) (v_prenex_12 Int) (v_prenex_13 (Array Int (Array Int Int))) (v_prenex_11 Int) (v_prenex_14 Int)) (= (select (let ((.cse5 (select v_prenex_13 v_prenex_11))) (store .cse5 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_15 (- 34359738368)) (let ((.cse6 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse5 (+ v_prenex_15 .cse6 (- 34359738368))) (select (select v_prenex_13 v_prenex_12) (+ v_prenex_14 .cse6 (- 34359738368))))))) v_prenex_15) 1)) .cse7) (or .cse0 (forall ((ULTIMATE.start_main_~b~0.base Int) (ULTIMATE.start_main_~a~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 ((.cse8 (select |#memory_int| ULTIMATE.start_main_~b~0.base))) (store .cse8 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) ULTIMATE.start_main_~b~0.offset) (let ((.cse9 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select .cse8 (+ .cse9 ULTIMATE.start_main_~b~0.offset (- 34359738368))) (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset .cse9 (- 34359738368))))))) ULTIMATE.start_main_~b~0.offset) 1)) .cse10 .cse7) (or (forall ((v_prenex_4 Int) (v_prenex_5 Int) (v_prenex_2 Int) (v_prenex_3 (Array Int (Array Int Int))) (v_prenex_1 Int)) (= (select (let ((.cse11 (select v_prenex_3 v_prenex_1))) (store .cse11 (+ (* (mod c_ULTIMATE.start_main_~i~0 4294967296) 8) v_prenex_5) (let ((.cse12 (* (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 8))) (+ (select (select v_prenex_3 v_prenex_2) (+ v_prenex_4 .cse12)) (select .cse11 (+ v_prenex_5 .cse12)))))) v_prenex_5) 1)) .cse0 .cse10 .cse2)))) is different from false [2021-10-11 02:32:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2021-10-11 02:32:37,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94308524] [2021-10-11 02:32:37,491 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:37,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13656288] [2021-10-11 02:32:37,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1873336325] [2021-10-11 02:32:37,512 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:32:37,512 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:37,517 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:37,523 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:37,524 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:37,690 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:38,321 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:38,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:38,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:38,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:38,779 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:38,841 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:38,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:39,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:39,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:39,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:39,107 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:39,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:39,299 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:39,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:39,400 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:41,600 WARN L197 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-10-11 02:32:41,768 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:32:41,952 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:32:42,296 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-10-11 02:32:42,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:42,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:32:42,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2021-10-11 02:32:42,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745845717] [2021-10-11 02:32:42,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:32:42,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:42,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:32:42,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=164, Unknown=1, NotChecked=26, Total=240 [2021-10-11 02:32:42,305 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2021-10-11 02:32:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:42,760 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-10-11 02:32:42,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-11 02:32:42,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2021-10-11 02:32:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:42,762 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:32:42,762 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 02:32:42,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=132, Invalid=471, Unknown=1, NotChecked=46, Total=650 [2021-10-11 02:32:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 02:32:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 14. [2021-10-11 02:32:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 02:32:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-10-11 02:32:42,768 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 9 [2021-10-11 02:32:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:42,769 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-10-11 02:32:42,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:32:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-10-11 02:32:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:32:42,770 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:42,770 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:42,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:42,986 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:42,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:42,986 INFO L82 PathProgramCache]: Analyzing trace with hash 252084121, now seen corresponding path program 2 times [2021-10-11 02:32:42,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:42,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21605230] [2021-10-11 02:32:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:43,036 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:32:43,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271214386] [2021-10-11 02:32:43,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:43,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:32:43,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:43,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:32:43,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:43,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:43,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:43,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21605230] [2021-10-11 02:32:43,226 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:43,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271214386] [2021-10-11 02:32:43,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475209987] [2021-10-11 02:32:43,232 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:32:43,233 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:43,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:43,233 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:43,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:43,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:43,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:43,732 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:43,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:43,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,073 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,097 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,309 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:32:44,643 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:32:44,850 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-10-11 02:32:45,047 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:32:45,276 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2021-10-11 02:32:45,602 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2021-10-11 02:32:45,604 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:45,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:32:45,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 02:32:45,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730931657] [2021-10-11 02:32:45,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:32:45,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:32:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:32:45,606 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 8 states. [2021-10-11 02:32:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:45,749 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-10-11 02:32:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:32:45,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 02:32:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:45,751 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:32:45,752 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:32:45,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:32:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:32:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 13. [2021-10-11 02:32:45,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:32:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-10-11 02:32:45,758 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-10-11 02:32:45,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:45,758 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-10-11 02:32:45,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:32:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-10-11 02:32:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:32:45,759 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:45,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:45,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:45,970 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:45,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1950532691, now seen corresponding path program 3 times [2021-10-11 02:32:45,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:45,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140882427] [2021-10-11 02:32:45,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:46,026 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:32:46,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [947313083] [2021-10-11 02:32:46,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:46,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:32:46,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:32:46,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 02:32:46,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:46,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:46,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:46,701 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 30 [2021-10-11 02:32:46,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140882427] [2021-10-11 02:32:46,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:32:46,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947313083] [2021-10-11 02:32:46,744 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:32:46,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1056421543] [2021-10-11 02:32:46,748 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:32:46,748 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:32:46,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:32:46,749 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:32:46,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:32:46,764 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@3fe030d1 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) [2021-10-11 02:32:46,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:46,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:32:46,766 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2021-10-11 02:32:46,766 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:32:46,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:32:46,990 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:32:46,990 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:32:46,990 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:32:46,990 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:32:46,990 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:32:46,990 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:32:46,990 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:32:46,990 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:32:46,990 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:32:46,990 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:32:46,990 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:32:46,991 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:32:46,991 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2021-10-11 02:32:46,991 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2021-10-11 02:32:46,997 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:32:46,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:32:46 BoogieIcfgContainer [2021-10-11 02:32:46,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:32:46,998 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:32:46,998 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:32:46,998 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:32:46,999 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:35" (3/4) ... [2021-10-11 02:32:47,002 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:32:47,002 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:32:47,003 INFO L168 Benchmark]: Toolchain (without parser) took 12203.62 ms. Allocated memory was 92.3 MB in the beginning and 180.4 MB in the end (delta: 88.1 MB). Free memory was 58.1 MB in the beginning and 93.7 MB in the end (delta: -35.6 MB). Peak memory consumption was 51.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:47,003 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory was 71.5 MB in the beginning and 71.5 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:47,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.88 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 57.9 MB in the beginning and 97.2 MB in the end (delta: -39.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:47,004 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.98 ms. Allocated memory is still 121.6 MB. Free memory was 97.2 MB in the beginning and 95.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:47,004 INFO L168 Benchmark]: Boogie Preprocessor took 28.68 ms. Allocated memory is still 121.6 MB. Free memory was 95.8 MB in the beginning and 94.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:47,004 INFO L168 Benchmark]: RCFGBuilder took 650.19 ms. Allocated memory is still 121.6 MB. Free memory was 94.1 MB in the beginning and 67.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:47,005 INFO L168 Benchmark]: TraceAbstraction took 11203.04 ms. Allocated memory was 121.6 MB in the beginning and 180.4 MB in the end (delta: 58.7 MB). Free memory was 66.9 MB in the beginning and 94.7 MB in the end (delta: -27.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:47,005 INFO L168 Benchmark]: Witness Printer took 3.72 ms. Allocated memory is still 180.4 MB. Free memory was 94.7 MB in the beginning and 93.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:47,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory was 71.5 MB in the beginning and 71.5 MB in the end (delta: 21.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.88 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 57.9 MB in the beginning and 97.2 MB in the end (delta: -39.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.98 ms. Allocated memory is still 121.6 MB. Free memory was 97.2 MB in the beginning and 95.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.68 ms. Allocated memory is still 121.6 MB. Free memory was 95.8 MB in the beginning and 94.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 650.19 ms. Allocated memory is still 121.6 MB. Free memory was 94.1 MB in the beginning and 67.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11203.04 ms. Allocated memory was 121.6 MB in the beginning and 180.4 MB in the end (delta: 58.7 MB). Free memory was 66.9 MB in the beginning and 94.7 MB in the end (delta: -27.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 16.1 GB. * Witness Printer took 3.72 ms. Allocated memory is still 180.4 MB. Free memory was 94.7 MB in the beginning and 93.7 MB in the end (delta: 1.0 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] long long 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_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI 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 -> d20f6aec4b57847edb8f89ecab5891521e565e39 [2021-10-11 02:32:50,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:50,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:50,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:50,056 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:50,057 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:50,058 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/ifeqn2.c [2021-10-11 02:32:50,132 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data/69b67d013/6d159380cb874da496bcbfc6304e9f44/FLAG705251c8b [2021-10-11 02:32:50,739 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:50,741 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/sv-benchmarks/c/array-fpi/ifeqn2.c [2021-10-11 02:32:50,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data/69b67d013/6d159380cb874da496bcbfc6304e9f44/FLAG705251c8b [2021-10-11 02:32:51,086 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/data/69b67d013/6d159380cb874da496bcbfc6304e9f44 [2021-10-11 02:32:51,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:51,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:51,091 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:51,091 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:51,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:51,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f7555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51, skipping insertion in model container [2021-10-11 02:32:51,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:51,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:51,278 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2021-10-11 02:32:51,301 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:51,315 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:51,350 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/sv-benchmarks/c/array-fpi/ifeqn2.c[589,602] [2021-10-11 02:32:51,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:51,386 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:51,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51 WrapperNode [2021-10-11 02:32:51,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:51,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:51,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:51,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:51,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:51,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:51,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:51,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:51,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... [2021-10-11 02:32:51,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:51,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:51,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:51,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:51,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:51,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:32:51,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:32:51,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-11 02:32:51,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:32:51,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:51,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:51,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-11 02:32:52,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:52,111 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-11 02:32:52,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:52 BoogieIcfgContainer [2021-10-11 02:32:52,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:52,114 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:52,114 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:52,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:52,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:51" (1/3) ... [2021-10-11 02:32:52,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@866e446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:52, skipping insertion in model container [2021-10-11 02:32:52,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:51" (2/3) ... [2021-10-11 02:32:52,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@866e446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:52, skipping insertion in model container [2021-10-11 02:32:52,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:52" (3/3) ... [2021-10-11 02:32:52,136 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn2.c [2021-10-11 02:32:52,151 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:52,154 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:32:52,166 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:32:52,193 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:52,193 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:32:52,193 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:52,194 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:52,194 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:52,194 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:52,194 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:52,194 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-10-11 02:32:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:32:52,212 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:52,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:52,213 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-10-11 02:32:52,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:32:52,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007758648] [2021-10-11 02:32:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:52,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:32:52,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:52,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:32:52,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007758648] [2021-10-11 02:32:52,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:52,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:52,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148925641] [2021-10-11 02:32:52,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:32:52,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:32:52,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:32:52,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:32:52,488 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-10-11 02:32:52,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:52,520 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-10-11 02:32:52,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:32:52,523 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-10-11 02:32:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:52,533 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:32:52,533 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:32:52,537 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 [2021-10-11 02:32:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:32:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:32:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:32:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-11 02:32:52,574 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-10-11 02:32:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:52,575 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-11 02:32:52,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:32:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-11 02:32:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:32:52,576 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:52,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:52,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:32:52,802 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:52,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:52,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-10-11 02:32:52,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:32:52,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343351565] [2021-10-11 02:32:52,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:53,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:32:53,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:53,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:32:53,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343351565] [2021-10-11 02:32:53,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:53,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:32:53,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184317288] [2021-10-11 02:32:53,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:32:53,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:32:53,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:32:53,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:32:53,169 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-10-11 02:32:53,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:53,520 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-10-11 02:32:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:32:53,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-10-11 02:32:53,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:53,530 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:32:53,530 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:32:53,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:32:53,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:32:53,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-11 02:32:53,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:32:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-11 02:32:53,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-11 02:32:53,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:53,539 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-11 02:32:53,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:32:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-11 02:32:53,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:32:53,540 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:53,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:53,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:32:53,752 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:53,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:53,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-10-11 02:32:53,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:32:53,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225237361] [2021-10-11 02:32:53,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:53,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:32:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:54,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:54,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:54,060 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 [2021-10-11 02:32:54,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:32:54,076 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:32:54,077 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:32:54,078 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:24 [2021-10-11 02:32:54,161 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:32:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:32:54,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:32:54,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225237361] [2021-10-11 02:32:54,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:54,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:32:54,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140186917] [2021-10-11 02:32:54,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:32:54,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:32:54,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:32:54,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:32:54,191 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2021-10-11 02:32:54,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:54,551 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-10-11 02:32:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:32:54,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 02:32:54,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:54,553 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:32:54,553 INFO L226 Difference]: Without dead ends: 38 [2021-10-11 02:32:54,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:32:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-11 02:32:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-10-11 02:32:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 02:32:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-11 02:32:54,561 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-11 02:32:54,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:54,562 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-11 02:32:54,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:32:54,563 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-11 02:32:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 02:32:54,563 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:54,564 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:32:54,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:32:54,778 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:54,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:54,778 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-10-11 02:32:54,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:32:54,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446656451] [2021-10-11 02:32:54,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:55,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-11 02:32:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:55,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:55,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446656451] [2021-10-11 02:32:55,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1060888582] [2021-10-11 02:32:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:55,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 02:32:55,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:55,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:32:55,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:32:55,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 8] total 18 [2021-10-11 02:32:55,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418386609] [2021-10-11 02:32:56,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:32:56,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:32:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:32:56,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:32:56,002 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 8 states. [2021-10-11 02:32:56,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:56,927 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2021-10-11 02:32:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:32:56,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-10-11 02:32:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:56,934 INFO L225 Difference]: With dead ends: 60 [2021-10-11 02:32:56,934 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 02:32:56,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:32:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 02:32:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-10-11 02:32:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-10-11 02:32:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-11 02:32:56,942 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-10-11 02:32:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:56,942 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-11 02:32:56,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:32:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-11 02:32:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-11 02:32:56,943 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:56,944 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] [2021-10-11 02:32:57,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt [2021-10-11 02:32:57,357 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:32:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:57,358 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-10-11 02:32:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:32:57,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410431477] [2021-10-11 02:32:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:32:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:57,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:32:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:32:57,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,696 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 [2021-10-11 02:32:57,697 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:32:57,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:32:57,720 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:32:57,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:31 [2021-10-11 02:32:57,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:32:57,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:32:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-11 02:32:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:32:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-11 02:32:57,945 INFO L348 Elim1Store]: treesize reduction 16, result has 59.0 percent of original size [2021-10-11 02:32:57,946 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 165 [2021-10-11 02:32:57,955 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:32:58,034 INFO L625 ElimStorePlain]: treesize reduction 107, result has 60.1 percent of original size [2021-10-11 02:32:58,043 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. [2021-10-11 02:32:58,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:187, output treesize:161 [2021-10-11 02:32:58,319 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-10-11 02:32:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-11 02:32:58,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:32:59,517 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-10-11 02:33:06,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410431477] [2021-10-11 02:33:06,438 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2021-10-11 02:33:06,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [68647244] [2021-10-11 02:33:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:33:06,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:06,810 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@455464b0 [2021-10-11 02:33:06,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346794575] [2021-10-11 02:33:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b700a78b-2386-4d6a-bd6e-e560e6981dff/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:33:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:33:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-11 02:33:06,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:33:06,943 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@455464b0 [2021-10-11 02:33:06,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:33:06,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-11 02:33:06,944 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-11 02:33:06,944 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:33:07,551 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 [2021-10-11 02:33:07,568 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-10-11 02:33:07,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:33:07 BoogieIcfgContainer [2021-10-11 02:33:07,569 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:33:07,569 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:33:07,569 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:33:07,569 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:33:07,570 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:52" (3/4) ... [2021-10-11 02:33:07,573 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:33:07,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:33:07,579 INFO L168 Benchmark]: Toolchain (without parser) took 16483.80 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 46.0 MB in the beginning and 22.7 MB in the end (delta: 23.3 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,579 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 67.1 MB. Free memory is still 47.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:07,580 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.43 ms. Allocated memory is still 67.1 MB. Free memory was 45.8 MB in the beginning and 48.9 MB in the end (delta: -3.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,585 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.55 ms. Allocated memory is still 67.1 MB. Free memory was 48.9 MB in the beginning and 47.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:07,586 INFO L168 Benchmark]: Boogie Preprocessor took 55.48 ms. Allocated memory is still 67.1 MB. Free memory was 47.2 MB in the beginning and 45.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,586 INFO L168 Benchmark]: RCFGBuilder took 627.68 ms. Allocated memory is still 67.1 MB. Free memory was 45.7 MB in the beginning and 46.6 MB in the end (delta: -969.4 kB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,587 INFO L168 Benchmark]: TraceAbstraction took 15454.41 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 46.4 MB in the beginning and 22.9 MB in the end (delta: 23.5 MB). Peak memory consumption was 39.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:33:07,587 INFO L168 Benchmark]: Witness Printer took 4.11 ms. Allocated memory is still 83.9 MB. Free memory was 22.9 MB in the beginning and 22.7 MB in the end (delta: 226.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:33:07,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 67.1 MB. Free memory is still 47.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.43 ms. Allocated memory is still 67.1 MB. Free memory was 45.8 MB in the beginning and 48.9 MB in the end (delta: -3.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.55 ms. Allocated memory is still 67.1 MB. Free memory was 48.9 MB in the beginning and 47.2 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.48 ms. Allocated memory is still 67.1 MB. Free memory was 47.2 MB in the beginning and 45.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 627.68 ms. Allocated memory is still 67.1 MB. Free memory was 45.7 MB in the beginning and 46.6 MB in the end (delta: -969.4 kB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15454.41 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 46.4 MB in the beginning and 22.9 MB in the end (delta: 23.5 MB). Peak memory consumption was 39.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.11 ms. Allocated memory is still 83.9 MB. Free memory was 22.9 MB in the beginning and 22.7 MB in the end (delta: 226.1 kB). 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] long long 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