./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn5f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b8372a31944d45846edae8fd3de2e59236f8e911 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn5f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b8372a31944d45846edae8fd3de2e59236f8e911 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 08:33:36,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 08:33:36,617 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 08:33:36,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 08:33:36,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 08:33:36,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 08:33:36,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 08:33:36,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 08:33:36,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 08:33:36,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 08:33:36,650 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 08:33:36,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 08:33:36,651 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 08:33:36,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 08:33:36,653 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 08:33:36,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 08:33:36,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 08:33:36,655 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 08:33:36,657 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 08:33:36,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 08:33:36,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 08:33:36,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 08:33:36,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 08:33:36,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 08:33:36,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 08:33:36,666 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 08:33:36,666 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 08:33:36,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 08:33:36,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 08:33:36,668 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 08:33:36,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 08:33:36,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 08:33:36,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 08:33:36,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 08:33:36,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 08:33:36,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 08:33:36,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 08:33:36,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 08:33:36,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 08:33:36,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 08:33:36,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 08:33:36,674 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 08:33:36,691 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 08:33:36,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 08:33:36,692 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 08:33:36,692 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 08:33:36,692 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 08:33:36,692 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 08:33:36,692 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 08:33:36,692 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 08:33:36,692 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 08:33:36,693 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 08:33:36,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 08:33:36,693 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 08:33:36,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 08:33:36,693 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 08:33:36,693 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 08:33:36,694 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 08:33:36,694 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 08:33:36,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 08:33:36,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 08:33:36,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 08:33:36,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 08:33:36,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 08:33:36,694 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 08:33:36,694 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 08:33:36,695 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 08:33:36,695 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 08:33:36,695 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 08:33:36,695 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 08:33:36,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 08:33:36,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 08:33:36,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:33:36,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 08:33:36,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 08:33:36,696 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 08:33:36,696 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 08:33:36,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 08:33:36,696 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 08:33:36,696 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 08:33:36,696 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 08:33:36,696 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8372a31944d45846edae8fd3de2e59236f8e911 [2020-12-09 08:33:36,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:33:36,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:33:36,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:33:36,895 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:33:36,895 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:33:36,896 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/../../sv-benchmarks/c/array-fpi/eqn5f.c [2020-12-09 08:33:36,938 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data/2c7dbd9f9/aef17a9a726c471ba1126874a08aee3e/FLAG1a363b7b4 [2020-12-09 08:33:37,307 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:33:37,307 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/sv-benchmarks/c/array-fpi/eqn5f.c [2020-12-09 08:33:37,312 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data/2c7dbd9f9/aef17a9a726c471ba1126874a08aee3e/FLAG1a363b7b4 [2020-12-09 08:33:37,322 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data/2c7dbd9f9/aef17a9a726c471ba1126874a08aee3e [2020-12-09 08:33:37,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:33:37,330 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:33:37,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:33:37,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:33:37,334 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:33:37,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,336 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a7cee70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37, skipping insertion in model container [2020-12-09 08:33:37,336 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:33:37,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:33:37,455 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2020-12-09 08:33:37,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:33:37,473 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:33:37,481 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2020-12-09 08:33:37,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:33:37,496 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:33:37,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37 WrapperNode [2020-12-09 08:33:37,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:33:37,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:33:37,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:33:37,497 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:33:37,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,507 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:33:37,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:33:37,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:33:37,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:33:37,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,529 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... [2020-12-09 08:33:37,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:33:37,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:33:37,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:33:37,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:33:37,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:33:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 08:33:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:33:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 08:33:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 08:33:37,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:33:37,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:33:37,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 08:33:37,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:33:37,859 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 08:33:37,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:33:37 BoogieIcfgContainer [2020-12-09 08:33:37,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:33:37,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:33:37,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:33:37,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:33:37,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:33:37" (1/3) ... [2020-12-09 08:33:37,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16efb565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:33:37, skipping insertion in model container [2020-12-09 08:33:37,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:33:37" (2/3) ... [2020-12-09 08:33:37,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16efb565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:33:37, skipping insertion in model container [2020-12-09 08:33:37,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:33:37" (3/3) ... [2020-12-09 08:33:37,866 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-12-09 08:33:37,876 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:33:37,878 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 08:33:37,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 08:33:37,905 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:33:37,905 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:33:37,905 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:33:37,905 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:33:37,905 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:33:37,906 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:33:37,906 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:33:37,906 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:33:37,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 08:33:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 08:33:37,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:33:37,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:33:37,919 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:33:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:33:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1727118254, now seen corresponding path program 1 times [2020-12-09 08:33:37,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:33:37,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118147397] [2020-12-09 08:33:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:33:38,007 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:33:38,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709321666] [2020-12-09 08:33:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:33:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:33:38,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 08:33:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:33:38,162 INFO L348 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2020-12-09 08:33:38,163 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 1 case distinctions, treesize of input 27 treesize of output 15 [2020-12-09 08:33:38,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:33:38,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:33:38,178 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 08:33:38,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:21 [2020-12-09 08:33:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:33:38,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:33:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:33:38,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118147397] [2020-12-09 08:33:38,300 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:33:38,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709321666] [2020-12-09 08:33:38,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:33:38,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-12-09 08:33:38,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506336475] [2020-12-09 08:33:38,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 08:33:38,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:33:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 08:33:38,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 08:33:38,317 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 9 states. [2020-12-09 08:33:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:33:38,463 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-12-09 08:33:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 08:33:38,464 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2020-12-09 08:33:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:33:38,471 INFO L225 Difference]: With dead ends: 42 [2020-12-09 08:33:38,472 INFO L226 Difference]: Without dead ends: 25 [2020-12-09 08:33:38,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-12-09 08:33:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-09 08:33:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 13. [2020-12-09 08:33:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 08:33:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2020-12-09 08:33:38,497 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2020-12-09 08:33:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:33:38,497 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2020-12-09 08:33:38,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 08:33:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2020-12-09 08:33:38,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:33:38,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:33:38,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:33:38,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 08:33:38,699 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:33:38,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:33:38,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1995514306, now seen corresponding path program 1 times [2020-12-09 08:33:38,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:33:38,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034556690] [2020-12-09 08:33:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:33:38,757 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:33:38,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174073670] [2020-12-09 08:33:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:33:38,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:33:38,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:33:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:33:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:33:38,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:33:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:33:38,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034556690] [2020-12-09 08:33:38,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:33:38,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174073670] [2020-12-09 08:33:38,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:33:38,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-12-09 08:33:38,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98139097] [2020-12-09 08:33:38,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:33:38,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:33:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:33:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:33:38,922 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 5 states. [2020-12-09 08:33:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:33:38,958 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-12-09 08:33:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 08:33:38,958 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 08:33:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:33:38,959 INFO L225 Difference]: With dead ends: 25 [2020-12-09 08:33:38,959 INFO L226 Difference]: Without dead ends: 19 [2020-12-09 08:33:38,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-09 08:33:38,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-09 08:33:38,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 13. [2020-12-09 08:33:38,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 08:33:38,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-09 08:33:38,962 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 8 [2020-12-09 08:33:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:33:38,962 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-09 08:33:38,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:33:38,962 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-09 08:33:38,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 08:33:38,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:33:38,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:33:39,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:33:39,164 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:33:39,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:33:39,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1660276183, now seen corresponding path program 1 times [2020-12-09 08:33:39,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:33:39,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33025793] [2020-12-09 08:33:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:33:39,214 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:33:39,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526221672] [2020-12-09 08:33:39,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:33:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:33:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 08:33:39,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:33:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:33:39,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:33:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:33:39,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33025793] [2020-12-09 08:33:39,338 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:33:39,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526221672] [2020-12-09 08:33:39,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1395617112] [2020-12-09 08:33:39,352 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:33:39,352 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:33:39,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:33:39,359 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:33:39,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:33:39,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:33:39,976 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:33:40,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:33:40,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 08:33:40,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-09 08:33:40,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014881633] [2020-12-09 08:33:40,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 08:33:40,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:33:40,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 08:33:40,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-09 08:33:40,487 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 6 states. [2020-12-09 08:33:40,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:33:40,542 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-12-09 08:33:40,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 08:33:40,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-09 08:33:40,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:33:40,543 INFO L225 Difference]: With dead ends: 29 [2020-12-09 08:33:40,543 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 08:33:40,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-12-09 08:33:40,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 08:33:40,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2020-12-09 08:33:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 08:33:40,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-09 08:33:40,546 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2020-12-09 08:33:40,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:33:40,546 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-09 08:33:40,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 08:33:40,546 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-09 08:33:40,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 08:33:40,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:33:40,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:33:40,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:33:40,748 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:33:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:33:40,750 INFO L82 PathProgramCache]: Analyzing trace with hash -76589895, now seen corresponding path program 1 times [2020-12-09 08:33:40,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:33:40,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241115723] [2020-12-09 08:33:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:33:40,804 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:33:40,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818750906] [2020-12-09 08:33:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:33:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:33:40,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-09 08:33:40,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:33:42,393 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 64 [2020-12-09 08:33:45,401 WARN L197 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-12-09 08:33:45,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:33:45,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:33:50,050 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~i~0 Int)) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse0 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse1 (* ULTIMATE.start_main_~i~0 8))) (store .cse0 (+ c_ULTIMATE.start_main_~a~0.offset .cse1) (+ (select .cse0 (+ c_ULTIMATE.start_main_~a~0.offset .cse1 (- 8))) 10)))) c_ULTIMATE.start_main_~b~0.base) c_ULTIMATE.start_main_~b~0.offset) 1)) is different from false [2020-12-09 08:33:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-12-09 08:33:50,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241115723] [2020-12-09 08:33:50,058 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:33:50,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818750906] [2020-12-09 08:33:50,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [693000889] [2020-12-09 08:33:50,060 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:33:50,060 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:33:50,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:33:50,061 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:33:50,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:33:50,115 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:33:50,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:33:50,531 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:33:50,661 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-12-09 08:33:51,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:33:51,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 08:33:51,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-12-09 08:33:51,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377929853] [2020-12-09 08:33:51,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 08:33:51,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:33:51,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 08:33:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=229, Unknown=2, NotChecked=30, Total=306 [2020-12-09 08:33:51,145 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 13 states. [2020-12-09 08:33:58,795 WARN L197 SmtUtils]: Spent 3.57 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-12-09 08:34:14,949 WARN L197 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 75 DAG size of output: 75 [2020-12-09 08:34:24,331 WARN L197 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-12-09 08:34:30,267 WARN L197 SmtUtils]: Spent 3.82 s on a formula simplification. DAG size of input: 78 DAG size of output: 75 [2020-12-09 08:34:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:34:33,190 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-12-09 08:34:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-09 08:34:33,190 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 9 [2020-12-09 08:34:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:34:33,191 INFO L225 Difference]: With dead ends: 48 [2020-12-09 08:34:33,191 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 08:34:33,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=174, Invalid=881, Unknown=5, NotChecked=62, Total=1122 [2020-12-09 08:34:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 08:34:33,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2020-12-09 08:34:33,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 08:34:33,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2020-12-09 08:34:33,196 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 9 [2020-12-09 08:34:33,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:34:33,196 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2020-12-09 08:34:33,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 08:34:33,196 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2020-12-09 08:34:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 08:34:33,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:34:33,197 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:34:33,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:33,398 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:34:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:34:33,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1123097575, now seen corresponding path program 1 times [2020-12-09 08:34:33,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:34:33,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482709614] [2020-12-09 08:34:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:34:33,425 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:34:33,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966962054] [2020-12-09 08:34:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:33,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 08:34:33,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:33,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:34:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:33,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482709614] [2020-12-09 08:34:33,503 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:34:33,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966962054] [2020-12-09 08:34:33,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:34:33,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2020-12-09 08:34:33,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715527990] [2020-12-09 08:34:33,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 08:34:33,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 08:34:33,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 08:34:33,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-09 08:34:33,504 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 8 states. [2020-12-09 08:34:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:34:33,564 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-09 08:34:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:34:33,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-09 08:34:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:34:33,566 INFO L225 Difference]: With dead ends: 34 [2020-12-09 08:34:33,566 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 08:34:33,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-09 08:34:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 08:34:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2020-12-09 08:34:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 08:34:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-12-09 08:34:33,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2020-12-09 08:34:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:34:33,571 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-12-09 08:34:33,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 08:34:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-12-09 08:34:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 08:34:33,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:34:33,572 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:34:33,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:33,773 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:34:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:34:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash -807142578, now seen corresponding path program 2 times [2020-12-09 08:34:33,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 08:34:33,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167930444] [2020-12-09 08:34:33,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 08:34:33,815 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 08:34:33,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089938007] [2020-12-09 08:34:33,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:33,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 08:34:33,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 08:34:33,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-09 08:34:33,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:34,407 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-12-09 08:34:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167930444] [2020-12-09 08:34:34,682 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:34:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089938007] [2020-12-09 08:34:34,682 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: should have been removed by DER [2020-12-09 08:34:34,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [972519707] [2020-12-09 08:34:34,683 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 08:34:34,684 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 08:34:34,684 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 08:34:34,684 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 08:34:34,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 08:34:34,746 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 08:34:35,208 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 08:34:35,325 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-12-09 08:34:35,735 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 08:34:35,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:34:35,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-09 08:34:35,735 ERROR L205 FreeRefinementEngine]: Strategy SIFA_TAIPAN failed to provide any proof altough trace is infeasible [2020-12-09 08:34:35,735 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:34:35,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:35,946 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 08:34:35,947 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 08:34:35,947 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 08:34:35,947 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 08:34:35,947 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-12-09 08:34:35,947 ERROR L222 RCFGBacktranslator]: unable to determine which branch was taken, unable to determine the location [2020-12-09 08:34:35,956 WARN L254 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-09 08:34:35,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:34:35 BoogieIcfgContainer [2020-12-09 08:34:35,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:34:35,957 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:34:35,957 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:34:35,957 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:34:35,958 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:33:37" (3/4) ... [2020-12-09 08:34:35,960 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 08:34:35,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:34:35,961 INFO L168 Benchmark]: Toolchain (without parser) took 58636.08 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 47.3 MB in the beginning and 125.6 MB in the end (delta: -78.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:34:35,961 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 88.1 MB. Free memory is still 63.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:34:35,962 INFO L168 Benchmark]: CACSL2BoogieTranslator took 164.71 ms. Allocated memory is still 88.1 MB. Free memory was 67.2 MB in the beginning and 60.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-12-09 08:34:35,962 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.96 ms. Allocated memory is still 88.1 MB. Free memory was 60.2 MB in the beginning and 58.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:34:35,962 INFO L168 Benchmark]: Boogie Preprocessor took 17.02 ms. Allocated memory is still 88.1 MB. Free memory was 58.6 MB in the beginning and 57.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:34:35,962 INFO L168 Benchmark]: RCFGBuilder took 321.53 ms. Allocated memory is still 88.1 MB. Free memory was 57.4 MB in the beginning and 53.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 08:34:35,963 INFO L168 Benchmark]: TraceAbstraction took 58095.19 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 53.2 MB in the beginning and 125.6 MB in the end (delta: -72.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:34:35,963 INFO L168 Benchmark]: Witness Printer took 3.34 ms. Allocated memory is still 157.3 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:34:35,965 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 88.1 MB. Free memory is still 63.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 164.71 ms. Allocated memory is still 88.1 MB. Free memory was 67.2 MB in the beginning and 60.2 MB in the end (delta: 6.9 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.96 ms. Allocated memory is still 88.1 MB. Free memory was 60.2 MB in the beginning and 58.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.02 ms. Allocated memory is still 88.1 MB. Free memory was 58.6 MB in the beginning and 57.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 321.53 ms. Allocated memory is still 88.1 MB. Free memory was 57.4 MB in the beginning and 53.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 58095.19 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 53.2 MB in the beginning and 125.6 MB in the end (delta: -72.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.34 ms. Allocated memory is still 157.3 MB. Free memory is still 125.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND TRUE !cond [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 [L33] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8372a31944d45846edae8fd3de2e59236f8e911 [2020-12-09 08:34:37,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 08:34:37,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 08:34:37,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 08:34:37,814 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 08:34:37,814 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 08:34:37,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/../../sv-benchmarks/c/array-fpi/eqn5f.c [2020-12-09 08:34:37,854 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data/8cf49d55a/4efd943d2f954ece8a695786ef65adbd/FLAG58e5fd8f8 [2020-12-09 08:34:38,228 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 08:34:38,229 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/sv-benchmarks/c/array-fpi/eqn5f.c [2020-12-09 08:34:38,235 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data/8cf49d55a/4efd943d2f954ece8a695786ef65adbd/FLAG58e5fd8f8 [2020-12-09 08:34:38,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/data/8cf49d55a/4efd943d2f954ece8a695786ef65adbd [2020-12-09 08:34:38,248 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 08:34:38,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 08:34:38,251 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 08:34:38,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 08:34:38,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 08:34:38,253 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138526ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38, skipping insertion in model container [2020-12-09 08:34:38,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 08:34:38,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 08:34:38,388 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2020-12-09 08:34:38,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:34:38,418 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 08:34:38,426 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/sv-benchmarks/c/array-fpi/eqn5f.c[588,601] [2020-12-09 08:34:38,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 08:34:38,444 INFO L208 MainTranslator]: Completed translation [2020-12-09 08:34:38,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38 WrapperNode [2020-12-09 08:34:38,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 08:34:38,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 08:34:38,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 08:34:38,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 08:34:38,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 08:34:38,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 08:34:38,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 08:34:38,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 08:34:38,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... [2020-12-09 08:34:38,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 08:34:38,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 08:34:38,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 08:34:38,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 08:34:38,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 08:34:38,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 08:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 08:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2020-12-09 08:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 08:34:38,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 08:34:38,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 08:34:38,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2020-12-09 08:34:38,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 08:34:38,837 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 08:34:38,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:34:38 BoogieIcfgContainer [2020-12-09 08:34:38,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 08:34:38,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 08:34:38,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 08:34:38,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 08:34:38,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 08:34:38" (1/3) ... [2020-12-09 08:34:38,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9fa33a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:34:38, skipping insertion in model container [2020-12-09 08:34:38,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 08:34:38" (2/3) ... [2020-12-09 08:34:38,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f9fa33a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 08:34:38, skipping insertion in model container [2020-12-09 08:34:38,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:34:38" (3/3) ... [2020-12-09 08:34:38,844 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn5f.c [2020-12-09 08:34:38,854 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 08:34:38,856 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 08:34:38,867 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 08:34:38,885 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 08:34:38,885 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 08:34:38,885 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 08:34:38,885 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 08:34:38,885 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 08:34:38,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 08:34:38,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 08:34:38,886 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 08:34:38,895 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-09 08:34:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 08:34:38,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:34:38,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:34:38,899 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:34:38,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:34:38,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2020-12-09 08:34:38,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:34:38,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318229781] [2020-12-09 08:34:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-12-09 08:34:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:38,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 08:34:39,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:39,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:34:39,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318229781] [2020-12-09 08:34:39,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:34:39,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 08:34:39,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252992144] [2020-12-09 08:34:39,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 08:34:39,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:34:39,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 08:34:39,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:34:39,047 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-09 08:34:39,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:34:39,062 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-12-09 08:34:39,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 08:34:39,063 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-12-09 08:34:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:34:39,070 INFO L225 Difference]: With dead ends: 38 [2020-12-09 08:34:39,071 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 08:34:39,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 08:34:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 08:34:39,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 08:34:39,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 08:34:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-09 08:34:39,099 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-12-09 08:34:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:34:39,099 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-09 08:34:39,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 08:34:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-09 08:34:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 08:34:39,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:34:39,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:34:39,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 08:34:39,300 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:34:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:34:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2020-12-09 08:34:39,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:34:39,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178095124] [2020-12-09 08:34:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-12-09 08:34:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:39,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:34:39,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:39,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:34:39,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:34:39,661 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2020-12-09 08:34:39,662 INFO L348 Elim1Store]: treesize reduction 117, result has 41.5 percent of original size [2020-12-09 08:34:39,663 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 2 case distinctions, treesize of input 54 treesize of output 103 [2020-12-09 08:34:39,672 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:34:39,758 INFO L625 ElimStorePlain]: treesize reduction 22, result has 79.2 percent of original size [2020-12-09 08:34:39,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,771 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 08:34:39,774 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,783 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:34:39,785 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,789 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:34:39,791 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,795 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-09 08:34:39,795 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:84 [2020-12-09 08:34:39,800 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-09 08:34:39,802 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:34:39,804 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:34:39,806 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,808 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:34:39,810 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,814 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,815 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,819 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:34:39,820 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:34:39,822 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:34:39,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:34:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:39,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:34:39,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178095124] [2020-12-09 08:34:39,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:34:39,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 08:34:39,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601681985] [2020-12-09 08:34:39,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:34:39,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:34:39,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:34:39,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 08:34:39,929 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-12-09 08:34:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:34:40,133 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-09 08:34:40,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:34:40,134 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-09 08:34:40,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:34:40,134 INFO L225 Difference]: With dead ends: 34 [2020-12-09 08:34:40,135 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 08:34:40,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 08:34:40,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 08:34:40,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-09 08:34:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 08:34:40,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-12-09 08:34:40,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2020-12-09 08:34:40,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:34:40,139 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-12-09 08:34:40,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:34:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-12-09 08:34:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 08:34:40,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:34:40,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:34:40,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 08:34:40,342 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:34:40,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:34:40,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2020-12-09 08:34:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:34:40,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060338338] [2020-12-09 08:34:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-12-09 08:34:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:40,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:34:40,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:40,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:40,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 08:34:40,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060338338] [2020-12-09 08:34:40,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 08:34:40,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 08:34:40,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75649409] [2020-12-09 08:34:40,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 08:34:40,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:34:40,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 08:34:40,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-09 08:34:40,593 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 7 states. [2020-12-09 08:34:40,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:34:40,782 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-09 08:34:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 08:34:40,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-12-09 08:34:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:34:40,785 INFO L225 Difference]: With dead ends: 42 [2020-12-09 08:34:40,785 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 08:34:40,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-12-09 08:34:40,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 08:34:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2020-12-09 08:34:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 08:34:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-12-09 08:34:40,791 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2020-12-09 08:34:40,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:34:40,791 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-12-09 08:34:40,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 08:34:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-12-09 08:34:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 08:34:40,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:34:40,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:34:40,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 08:34:40,994 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:34:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:34:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2020-12-09 08:34:40,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:34:40,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [637479710] [2020-12-09 08:34:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-12-09 08:34:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:41,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 08:34:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:41,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:41,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:34:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:41,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [637479710] [2020-12-09 08:34:41,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1548934795] [2020-12-09 08:34:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:34:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:41,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 08:34:41,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:41,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:34:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:41,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191518032] [2020-12-09 08:34:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 08:34:41,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:41,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:34:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:41,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 5 imperfect interpolant sequences. [2020-12-09 08:34:41,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 7, 8, 7, 7] total 20 [2020-12-09 08:34:41,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934467958] [2020-12-09 08:34:41,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 08:34:41,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:34:41,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 08:34:41,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2020-12-09 08:34:41,580 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-12-09 08:34:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:34:41,690 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-12-09 08:34:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 08:34:41,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 08:34:41,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:34:41,691 INFO L225 Difference]: With dead ends: 38 [2020-12-09 08:34:41,691 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 08:34:41,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2020-12-09 08:34:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 08:34:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-12-09 08:34:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 08:34:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-09 08:34:41,695 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2020-12-09 08:34:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:34:41,695 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-09 08:34:41,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 08:34:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-09 08:34:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 08:34:41,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:34:41,696 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:34:42,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:42,298 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:34:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:34:42,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2020-12-09 08:34:42,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:34:42,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1957071016] [2020-12-09 08:34:42,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 08:34:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:42,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 08:34:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:42,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:42,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:34:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:42,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1957071016] [2020-12-09 08:34:42,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [511080207] [2020-12-09 08:34:42,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:34:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:42,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 08:34:42,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:42,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:34:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:42,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681865487] [2020-12-09 08:34:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:42,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 08:34:42,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:42,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:34:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:34:42,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:34:42,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7, 6, 8, 6] total 14 [2020-12-09 08:34:42,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217500784] [2020-12-09 08:34:42,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 08:34:42,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:34:42,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 08:34:42,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-12-09 08:34:42,749 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 14 states. [2020-12-09 08:34:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:34:43,121 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-12-09 08:34:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 08:34:43,123 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-09 08:34:43,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:34:43,123 INFO L225 Difference]: With dead ends: 36 [2020-12-09 08:34:43,123 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 08:34:43,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-12-09 08:34:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 08:34:43,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2020-12-09 08:34:43,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-09 08:34:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-12-09 08:34:43,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2020-12-09 08:34:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:34:43,126 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-12-09 08:34:43,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 08:34:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-12-09 08:34:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 08:34:43,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:34:43,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:34:43,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:34:43,730 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:34:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:34:43,732 INFO L82 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2020-12-09 08:34:43,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:34:43,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1528436343] [2020-12-09 08:34:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 08:34:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:34:43,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 08:34:43,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:34:43,873 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 08:34:43,875 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:34:43,902 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:34:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:34:43,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:34:43,917 INFO L348 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2020-12-09 08:34:43,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2020-12-09 08:34:43,919 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 08:34:43,934 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:34:43,934 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:34:43,935 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:48 [2020-12-09 08:34:43,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:34:59,243 WARN L197 SmtUtils]: Spent 15.28 s on a formula simplification. DAG size of input: 101 DAG size of output: 50 [2020-12-09 08:34:59,244 INFO L348 Elim1Store]: treesize reduction 405, result has 25.8 percent of original size [2020-12-09 08:34:59,244 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 112 treesize of output 195 [2020-12-09 08:34:59,251 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:01,446 WARN L197 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-09 08:35:01,447 INFO L625 ElimStorePlain]: treesize reduction 63, result has 72.8 percent of original size [2020-12-09 08:35:01,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,452 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,453 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:01,455 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,456 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,457 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,458 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 08:35:01,459 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:119, output treesize:169 [2020-12-09 08:35:01,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,461 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,462 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:01,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,464 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,465 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,543 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,544 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,544 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,545 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:01,546 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,548 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,610 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,612 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:01,613 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,614 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,670 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,671 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:01,672 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:01,672 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:01,673 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:02,039 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-09 08:35:02,049 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 8, 1] term [2020-12-09 08:35:02,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:35:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,170 INFO L348 Elim1Store]: treesize reduction 170, result has 24.8 percent of original size [2020-12-09 08:35:02,171 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 205 [2020-12-09 08:35:02,177 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:02,912 WARN L197 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2020-12-09 08:35:02,913 INFO L625 ElimStorePlain]: treesize reduction 126, result has 74.2 percent of original size [2020-12-09 08:35:02,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:02,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:03,001 INFO L348 Elim1Store]: treesize reduction 170, result has 24.8 percent of original size [2020-12-09 08:35:03,002 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 195 [2020-12-09 08:35:03,005 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:03,562 WARN L197 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 96 [2020-12-09 08:35:03,563 INFO L625 ElimStorePlain]: treesize reduction 111, result has 76.5 percent of original size [2020-12-09 08:35:03,570 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2020-12-09 08:35:03,570 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:405, output treesize:362 [2020-12-09 08:35:03,800 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-12-09 08:35:04,227 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-12-09 08:35:04,234 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-09 08:35:04,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:35:04,239 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 08:35:04,241 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 08:35:04,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 08:35:04,256 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 08:35:04,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 08:35:04,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-09 08:35:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:35:04,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:35:07,057 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_main_~i~0 (_ BitVec 32))) (= ((_ sign_extend 32) (_ bv1 32)) (let ((.cse0 (select (store |c_#memory_int| c_ULTIMATE.start_main_~a~0.base (let ((.cse1 (select |c_#memory_int| c_ULTIMATE.start_main_~a~0.base)) (.cse2 (bvmul ULTIMATE.start_main_~i~0 (_ bv8 32)))) (let ((.cse3 (bvadd (concat (select .cse1 (bvadd c_ULTIMATE.start_main_~a~0.offset .cse2 (_ bv4294967292 32))) (select .cse1 (bvadd c_ULTIMATE.start_main_~a~0.offset .cse2 (_ bv4294967288 32)))) ((_ sign_extend 32) (_ bv10 32))))) (store (store .cse1 (bvadd c_ULTIMATE.start_main_~a~0.offset .cse2) ((_ extract 31 0) .cse3)) (bvadd c_ULTIMATE.start_main_~a~0.offset .cse2 (_ bv4 32)) ((_ extract 63 32) .cse3))))) c_ULTIMATE.start_main_~b~0.base))) (concat (select .cse0 (bvadd c_ULTIMATE.start_main_~b~0.offset (_ bv4 32))) (select .cse0 c_ULTIMATE.start_main_~b~0.offset))))) is different from false [2020-12-09 08:35:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-12-09 08:35:07,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1528436343] [2020-12-09 08:35:07,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1180107626] [2020-12-09 08:35:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt [2020-12-09 08:35:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:35:07,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 08:35:07,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:35:07,270 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 08:35:07,272 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:07,306 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:35:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,315 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2020-12-09 08:35:07,316 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:07,337 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:35:07,338 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:35:07,338 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:54 [2020-12-09 08:35:07,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,454 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 83 [2020-12-09 08:35:07,455 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:07,479 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:35:07,479 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:35:07,480 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:101, output treesize:89 [2020-12-09 08:35:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:07,758 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 123 [2020-12-09 08:35:07,759 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:07,810 INFO L625 ElimStorePlain]: treesize reduction 4, result has 97.0 percent of original size [2020-12-09 08:35:07,811 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 08:35:07,812 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:148, output treesize:128 [2020-12-09 08:35:10,474 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:10,475 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 08:35:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:35:10,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:35:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:35:10,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440531695] [2020-12-09 08:35:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 08:35:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 08:35:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-09 08:35:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 08:35:11,147 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-09 08:35:11,149 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:11,175 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:35:11,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:11,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:11,193 INFO L348 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2020-12-09 08:35:11,193 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2020-12-09 08:35:11,194 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:11,213 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 08:35:11,214 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 08:35:11,214 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:66, output treesize:48 [2020-12-09 08:35:11,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:11,555 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 54 [2020-12-09 08:35:11,555 INFO L348 Elim1Store]: treesize reduction 392, result has 28.2 percent of original size [2020-12-09 08:35:11,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 112 treesize of output 208 [2020-12-09 08:35:11,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:15,752 WARN L197 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-12-09 08:35:15,752 INFO L625 ElimStorePlain]: treesize reduction 86, result has 66.3 percent of original size [2020-12-09 08:35:15,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,754 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,755 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:15,758 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,758 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,759 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,759 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-09 08:35:15,759 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:119, output treesize:169 [2020-12-09 08:35:15,760 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:15,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,762 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,766 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,767 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:15,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,768 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,769 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,826 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:15,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,885 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 08:35:15,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-09 08:35:15,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-09 08:35:15,992 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 8, 1] term [2020-12-09 08:35:15,992 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:35:16,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,110 INFO L348 Elim1Store]: treesize reduction 170, result has 24.8 percent of original size [2020-12-09 08:35:16,110 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 195 treesize of output 204 [2020-12-09 08:35:16,113 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:16,866 WARN L197 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 103 [2020-12-09 08:35:16,867 INFO L625 ElimStorePlain]: treesize reduction 139, result has 74.7 percent of original size [2020-12-09 08:35:16,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 08:35:16,962 INFO L348 Elim1Store]: treesize reduction 170, result has 24.8 percent of original size [2020-12-09 08:35:16,962 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 205 [2020-12-09 08:35:16,965 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 08:35:17,481 WARN L197 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 95 [2020-12-09 08:35:17,481 INFO L625 ElimStorePlain]: treesize reduction 102, result has 79.8 percent of original size [2020-12-09 08:35:17,487 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2020-12-09 08:35:17,487 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 8 variables, input treesize:405, output treesize:402 [2020-12-09 08:35:18,999 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-12-09 08:35:23,702 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-12-09 08:35:23,708 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-09 08:35:23,708 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 08:35:23,712 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 08:35:23,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 08:35:23,716 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 11 disjuncts [2020-12-09 08:35:23,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-09 08:35:23,733 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-09 08:35:23,734 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 9 disjuncts [2020-12-09 08:35:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 08:35:23,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 08:35:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-12-09 08:35:23,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 08:35:23,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 9, 7] total 22 [2020-12-09 08:35:23,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659558004] [2020-12-09 08:35:23,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-09 08:35:23,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 08:35:23,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-09 08:35:23,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=328, Unknown=15, NotChecked=38, Total=462 [2020-12-09 08:35:23,845 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 22 states. [2020-12-09 08:35:30,381 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-09 08:35:37,318 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-12-09 08:35:47,694 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-12-09 08:35:53,146 WARN L197 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 137 DAG size of output: 108 [2020-12-09 08:35:55,884 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-12-09 08:36:01,155 WARN L197 SmtUtils]: Spent 4.93 s on a formula simplification. DAG size of input: 151 DAG size of output: 84 [2020-12-09 08:36:03,233 WARN L197 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-09 08:36:29,557 WARN L197 SmtUtils]: Spent 24.00 s on a formula simplification. DAG size of input: 165 DAG size of output: 163 [2020-12-09 08:37:16,687 WARN L197 SmtUtils]: Spent 42.16 s on a formula simplification. DAG size of input: 196 DAG size of output: 194 [2020-12-09 08:37:16,971 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-12-09 08:37:20,311 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-12-09 08:38:11,098 WARN L197 SmtUtils]: Spent 50.01 s on a formula simplification. DAG size of input: 192 DAG size of output: 179 [2020-12-09 08:38:15,788 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-12-09 08:38:56,850 WARN L197 SmtUtils]: Spent 37.67 s on a formula simplification. DAG size of input: 196 DAG size of output: 183 [2020-12-09 08:39:03,608 WARN L197 SmtUtils]: Spent 3.60 s on a formula simplification. DAG size of input: 155 DAG size of output: 88 [2020-12-09 08:39:15,150 WARN L197 SmtUtils]: Spent 7.63 s on a formula simplification. DAG size of input: 154 DAG size of output: 87 [2020-12-09 08:39:25,843 WARN L197 SmtUtils]: Spent 4.48 s on a formula simplification. DAG size of input: 120 DAG size of output: 118 [2020-12-09 08:39:30,155 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 62 [2020-12-09 08:39:32,198 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-12-09 08:39:33,790 WARN L197 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 59 [2020-12-09 08:39:36,862 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-09 08:39:43,572 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-12-09 08:39:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 08:39:43,673 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-12-09 08:39:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-09 08:39:43,679 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 16 [2020-12-09 08:39:43,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 08:39:43,680 INFO L225 Difference]: With dead ends: 92 [2020-12-09 08:39:43,680 INFO L226 Difference]: Without dead ends: 90 [2020-12-09 08:39:43,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 234.6s TimeCoverageRelationStatistics Valid=484, Invalid=1903, Unknown=67, NotChecked=96, Total=2550 [2020-12-09 08:39:43,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-09 08:39:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 36. [2020-12-09 08:39:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-09 08:39:43,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-09 08:39:43,691 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 16 [2020-12-09 08:39:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 08:39:43,691 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-09 08:39:43,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-09 08:39:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-09 08:39:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 08:39:43,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 08:39:43,692 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 08:39:44,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3,12 cvc4 --incremental --print-success --lang smt [2020-12-09 08:39:44,296 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 08:39:44,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 08:39:44,297 INFO L82 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2020-12-09 08:39:44,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 08:39:44,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [822715143] [2020-12-09 08:39:44,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-12-09 08:39:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:39:44,442 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:39:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 08:39:44,551 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 08:39:44,582 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 08:39:44,582 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 08:39:44,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-12-09 08:39:44,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 08:39:44 BoogieIcfgContainer [2020-12-09 08:39:44,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 08:39:44,827 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 08:39:44,827 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 08:39:44,827 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 08:39:44,827 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 08:34:38" (3/4) ... [2020-12-09 08:39:44,828 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 08:39:44,859 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_837149a4-7e4f-4bf5-91a8-7d2b28f41356/bin/utaipan/witness.graphml [2020-12-09 08:39:44,859 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 08:39:44,860 INFO L168 Benchmark]: Toolchain (without parser) took 306610.00 ms. Allocated memory was 54.5 MB in the beginning and 92.3 MB in the end (delta: 37.7 MB). Free memory was 32.9 MB in the beginning and 65.4 MB in the end (delta: -32.5 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:39:44,860 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.0 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:39:44,860 INFO L168 Benchmark]: CACSL2BoogieTranslator took 194.43 ms. Allocated memory is still 54.5 MB. Free memory was 32.7 MB in the beginning and 35.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:39:44,860 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.92 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 35.5 MB in the beginning and 59.4 MB in the end (delta: -23.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 08:39:44,861 INFO L168 Benchmark]: Boogie Preprocessor took 21.54 ms. Allocated memory is still 75.5 MB. Free memory was 59.4 MB in the beginning and 58.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 08:39:44,861 INFO L168 Benchmark]: RCFGBuilder took 331.25 ms. Allocated memory is still 75.5 MB. Free memory was 58.0 MB in the beginning and 42.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 08:39:44,861 INFO L168 Benchmark]: TraceAbstraction took 305987.15 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 41.5 MB in the beginning and 68.5 MB in the end (delta: -27.0 MB). Peak memory consumption was 38.6 MB. Max. memory is 16.1 GB. [2020-12-09 08:39:44,861 INFO L168 Benchmark]: Witness Printer took 32.02 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 65.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 08:39:44,863 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 54.5 MB. Free memory was 37.1 MB in the beginning and 37.0 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 194.43 ms. Allocated memory is still 54.5 MB. Free memory was 32.7 MB in the beginning and 35.7 MB in the end (delta: -3.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.92 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 35.5 MB in the beginning and 59.4 MB in the end (delta: -23.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.54 ms. Allocated memory is still 75.5 MB. Free memory was 59.4 MB in the beginning and 58.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 331.25 ms. Allocated memory is still 75.5 MB. Free memory was 58.0 MB in the beginning and 42.1 MB in the end (delta: 16.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 305987.15 ms. Allocated memory was 75.5 MB in the beginning and 92.3 MB in the end (delta: 16.8 MB). Free memory was 41.5 MB in the beginning and 68.5 MB in the end (delta: -27.0 MB). Peak memory consumption was 38.6 MB. Max. memory is 16.1 GB. * Witness Printer took 32.02 ms. Allocated memory is still 92.3 MB. Free memory was 68.5 MB in the beginning and 65.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 1 [L32] b[0] = 1 [L33] i=1 VAL [N=2] [L33] COND TRUE i