./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8 --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 eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 .......................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8 --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 eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-4e77c04 [2021-10-13 08:01:59,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:01:59,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:01:59,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:01:59,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:01:59,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:01:59,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:01:59,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:01:59,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:01:59,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:01:59,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:01:59,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:01:59,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:01:59,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:01:59,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:01:59,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:01:59,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:01:59,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:01:59,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:01:59,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:01:59,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:01:59,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:01:59,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:01:59,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:01:59,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:01:59,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:01:59,796 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:01:59,797 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:01:59,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:01:59,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:01:59,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:01:59,800 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:01:59,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:01:59,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:01:59,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:01:59,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:01:59,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:01:59,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:01:59,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:01:59,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:01:59,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:01:59,808 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:01:59,834 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:01:59,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:01:59,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:01:59,843 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:01:59,843 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:01:59,844 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:01:59,844 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:01:59,844 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:01:59,845 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:01:59,845 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:01:59,845 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:01:59,845 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:01:59,846 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:01:59,846 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:01:59,846 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:01:59,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:01:59,851 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:01:59,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:01:59,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:01:59,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:01:59,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:01:59,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:01:59,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:01:59,853 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:01:59,853 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:01:59,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:01:59,853 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:01:59,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:01:59,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:01:59,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:01:59,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:01:59,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:01:59,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:01:59,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:01:59,855 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:01:59,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:01:59,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:01:59,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:01:59,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:01:59,857 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 [2021-10-13 08:02:00,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:02:00,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:02:00,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:02:00,125 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:02:00,125 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:02:00,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/ifeqn4f.c [2021-10-13 08:02:00,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data/737f964a5/223db840834448788bd13c520d7e7248/FLAG2fea72273 [2021-10-13 08:02:00,576 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:02:00,576 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/sv-benchmarks/c/array-fpi/ifeqn4f.c [2021-10-13 08:02:00,582 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data/737f964a5/223db840834448788bd13c520d7e7248/FLAG2fea72273 [2021-10-13 08:02:01,009 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data/737f964a5/223db840834448788bd13c520d7e7248 [2021-10-13 08:02:01,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:02:01,013 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:02:01,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:02:01,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:02:01,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:02:01,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19da3f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01, skipping insertion in model container [2021-10-13 08:02:01,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:02:01,040 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:02:01,206 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2021-10-13 08:02:01,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:02:01,230 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:02:01,242 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2021-10-13 08:02:01,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:02:01,262 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:02:01,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01 WrapperNode [2021-10-13 08:02:01,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:02:01,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:02:01,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:02:01,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:02:01,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,278 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:02:01,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:02:01,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:02:01,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:02:01,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:02:01,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:02:01,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:02:01,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:02:01,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (1/1) ... [2021-10-13 08:02:01,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:02:01,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:01,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:02:01,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:02:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:02:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:02:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:02:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:02:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:02:01,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:02:01,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:02:01,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:02:01,886 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 08:02:01,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:01 BoogieIcfgContainer [2021-10-13 08:02:01,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:02:01,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:02:01,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:02:01,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:02:01,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:02:01" (1/3) ... [2021-10-13 08:02:01,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642b216d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:01, skipping insertion in model container [2021-10-13 08:02:01,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:01" (2/3) ... [2021-10-13 08:02:01,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642b216d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:01, skipping insertion in model container [2021-10-13 08:02:01,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:01" (3/3) ... [2021-10-13 08:02:01,899 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2021-10-13 08:02:01,904 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:02:01,904 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:02:01,951 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:02:01,957 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:02:01,958 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:02:01,971 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:02:01,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:01,975 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:01,976 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:01,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1095923036, now seen corresponding path program 1 times [2021-10-13 08:02:01,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:02:01,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916273482] [2021-10-13 08:02:01,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:01,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:02:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:02,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:02:02,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916273482] [2021-10-13 08:02:02,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916273482] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:02,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:02,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:02:02,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746797984] [2021-10-13 08:02:02,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:02:02,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:02:02,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:02:02,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:02:02,183 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:02,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:02,219 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-10-13 08:02:02,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:02:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-13 08:02:02,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:02,229 INFO L225 Difference]: With dead ends: 20 [2021-10-13 08:02:02,230 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 08:02:02,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:02:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 08:02:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 08:02:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-13 08:02:02,263 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-10-13 08:02:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:02,264 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-13 08:02:02,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-13 08:02:02,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:02:02,265 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:02,265 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:02,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:02:02,266 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:02,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:02,270 INFO L82 PathProgramCache]: Analyzing trace with hash 255696374, now seen corresponding path program 1 times [2021-10-13 08:02:02,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:02:02,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360529514] [2021-10-13 08:02:02,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:02,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:02:02,333 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:02:02,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823114676] [2021-10-13 08:02:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:02,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:02,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:02,338 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:02,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:02:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:02,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:02:02,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:02,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:02,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:02:02,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360529514] [2021-10-13 08:02:02,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:02:02,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823114676] [2021-10-13 08:02:02,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823114676] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:02,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:02,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-10-13 08:02:02,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998526822] [2021-10-13 08:02:02,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:02:02,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:02:02,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:02:02,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:02:02,576 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:02,646 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-13 08:02:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:02:02,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 08:02:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:02,647 INFO L225 Difference]: With dead ends: 21 [2021-10-13 08:02:02,647 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 08:02:02,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:02:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 08:02:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-10-13 08:02:02,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-13 08:02:02,652 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-13 08:02:02,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:02,652 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-13 08:02:02,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:02,653 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-13 08:02:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:02:02,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:02,653 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:02,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:02,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:02,882 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash -652476163, now seen corresponding path program 1 times [2021-10-13 08:02:02,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:02:02,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283022544] [2021-10-13 08:02:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:02,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:02:02,922 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:02:02,923 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974159746] [2021-10-13 08:02:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:02,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:02,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:02,930 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:02,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:02:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:02:03,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 08:02:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:03,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:03,454 INFO L354 Elim1Store]: treesize reduction 150, result has 42.3 percent of original size [2021-10-13 08:02:03,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 74 treesize of output 143 [2021-10-13 08:02:03,698 INFO L354 Elim1Store]: treesize reduction 23, result has 54.9 percent of original size [2021-10-13 08:02:03,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 93 [2021-10-13 08:02:03,805 INFO L354 Elim1Store]: treesize reduction 48, result has 52.0 percent of original size [2021-10-13 08:02:03,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 75 [2021-10-13 08:02:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:03,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:02:03,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283022544] [2021-10-13 08:02:03,941 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:02:03,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974159746] [2021-10-13 08:02:03,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974159746] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:03,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [219612846] [2021-10-13 08:02:03,972 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-13 08:02:03,972 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:02:03,981 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:02:03,986 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:02:03,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:02:04,020 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:04,023 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:02:04,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:04,025 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:02:04,026 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:02:04,027 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:04,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:02:04,031 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-13 08:02:04,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:04,100 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 08:02:04,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 08:02:04,102 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:04,105 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:02:04,106 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:04,106 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:02:04,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:02:04,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:02:04,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:04,140 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:04,142 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 108 [2021-10-13 08:02:04,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:02:04,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:124, output treesize:108 [2021-10-13 08:02:04,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:04,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:04,370 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_17| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:02:04,373 INFO L168 Benchmark]: Toolchain (without parser) took 3359.91 ms. Allocated memory is still 144.7 MB. Free memory was 111.9 MB in the beginning and 89.9 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:04,373 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 96.5 MB. Free memory is still 50.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:04,374 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.10 ms. Allocated memory is still 144.7 MB. Free memory was 111.6 MB in the beginning and 119.9 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:04,376 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.19 ms. Allocated memory is still 144.7 MB. Free memory was 119.9 MB in the beginning and 118.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:04,377 INFO L168 Benchmark]: Boogie Preprocessor took 40.62 ms. Allocated memory is still 144.7 MB. Free memory was 118.2 MB in the beginning and 116.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:04,377 INFO L168 Benchmark]: RCFGBuilder took 548.29 ms. Allocated memory is still 144.7 MB. Free memory was 116.9 MB in the beginning and 101.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:04,378 INFO L168 Benchmark]: TraceAbstraction took 2482.47 ms. Allocated memory is still 144.7 MB. Free memory was 101.4 MB in the beginning and 89.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:04,381 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 96.5 MB. Free memory is still 50.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 249.10 ms. Allocated memory is still 144.7 MB. Free memory was 111.6 MB in the beginning and 119.9 MB in the end (delta: -8.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.19 ms. Allocated memory is still 144.7 MB. Free memory was 119.9 MB in the beginning and 118.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.62 ms. Allocated memory is still 144.7 MB. Free memory was 118.2 MB in the beginning and 116.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 548.29 ms. Allocated memory is still 144.7 MB. Free memory was 116.9 MB in the beginning and 101.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2482.47 ms. Allocated memory is still 144.7 MB. Free memory was 101.4 MB in the beginning and 89.9 MB in the end (delta: 11.5 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_17| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_17|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:02:04,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:02:06,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:02:06,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:02:06,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:02:06,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:02:06,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:02:06,788 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:02:06,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:02:06,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:02:06,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:02:06,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:02:06,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:02:06,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:02:06,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:02:06,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:02:06,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:02:06,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:02:06,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:02:06,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:02:06,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:02:06,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:02:06,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:02:06,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:02:06,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:02:06,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:02:06,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:02:06,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:02:06,828 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:02:06,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:02:06,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:02:06,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:02:06,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:02:06,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:02:06,838 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:02:06,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:02:06,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:02:06,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:02:06,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:02:06,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:02:06,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:02:06,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:02:06,855 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:02:06,902 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:02:06,902 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:02:06,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:02:06,904 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:02:06,904 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:02:06,904 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:02:06,905 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:02:06,905 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:02:06,905 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:02:06,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:02:06,908 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:02:06,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:02:06,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:02:06,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:02:06,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:02:06,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:02:06,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:02:06,909 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:02:06,910 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:02:06,910 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:02:06,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:02:06,910 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:02:06,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:02:06,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:02:06,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:02:06,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:02:06,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:02:06,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:02:06,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:02:06,912 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:02:06,913 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:02:06,913 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:06,913 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:02:06,913 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:02:06,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:02:06,914 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 [2021-10-13 08:02:07,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:02:07,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:02:07,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:02:07,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:02:07,319 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:02:07,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-fpi/ifeqn4f.c [2021-10-13 08:02:07,387 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data/cb846f2ce/8cea18201de148319887c4e3d9e536f6/FLAG9329e4966 [2021-10-13 08:02:07,875 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:02:07,875 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/sv-benchmarks/c/array-fpi/ifeqn4f.c [2021-10-13 08:02:07,881 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data/cb846f2ce/8cea18201de148319887c4e3d9e536f6/FLAG9329e4966 [2021-10-13 08:02:08,259 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/data/cb846f2ce/8cea18201de148319887c4e3d9e536f6 [2021-10-13 08:02:08,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:02:08,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:02:08,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:02:08,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:02:08,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:02:08,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a89f19d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08, skipping insertion in model container [2021-10-13 08:02:08,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,289 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:02:08,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:02:08,495 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2021-10-13 08:02:08,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:02:08,553 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:02:08,581 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2021-10-13 08:02:08,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:02:08,625 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:02:08,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08 WrapperNode [2021-10-13 08:02:08,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:02:08,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:02:08,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:02:08,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:02:08,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,652 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,680 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:02:08,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:02:08,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:02:08,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:02:08,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:02:08,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:02:08,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:02:08,740 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:02:08,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (1/1) ... [2021-10-13 08:02:08,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:02:08,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:08,775 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:02:08,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:02:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:02:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:02:08,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-10-13 08:02:08,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 08:02:08,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:02:08,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:02:08,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-10-13 08:02:09,247 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:02:09,247 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 08:02:09,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:09 BoogieIcfgContainer [2021-10-13 08:02:09,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:02:09,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:02:09,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:02:09,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:02:09,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:02:08" (1/3) ... [2021-10-13 08:02:09,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232c4157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:09, skipping insertion in model container [2021-10-13 08:02:09,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:08" (2/3) ... [2021-10-13 08:02:09,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232c4157 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:09, skipping insertion in model container [2021-10-13 08:02:09,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:09" (3/3) ... [2021-10-13 08:02:09,257 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2021-10-13 08:02:09,262 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:02:09,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:02:09,340 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:02:09,347 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:02:09,347 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:02:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:02:09,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:09,366 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:09,367 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:09,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-10-13 08:02:09,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:09,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558131637] [2021-10-13 08:02:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:09,401 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:09,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:09,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:09,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:02:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:09,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:02:09,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:09,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:09,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:09,604 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:09,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558131637] [2021-10-13 08:02:09,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558131637] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:09,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:09,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:02:09,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702521149] [2021-10-13 08:02:09,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:02:09,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:02:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:02:09,627 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:09,641 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-10-13 08:02:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:02:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:02:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:09,650 INFO L225 Difference]: With dead ends: 42 [2021-10-13 08:02:09,651 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 08:02:09,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:02:09,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 08:02:09,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 08:02:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:09,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-13 08:02:09,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-10-13 08:02:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:09,681 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-13 08:02:09,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-13 08:02:09,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:02:09,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:09,682 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:09,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:09,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:09,894 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:09,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:09,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-10-13 08:02:09,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:09,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940351796] [2021-10-13 08:02:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:09,897 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:09,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:09,898 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:09,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:02:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:10,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:02:10,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:10,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:10,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:10,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940351796] [2021-10-13 08:02:10,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940351796] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:10,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:10,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-13 08:02:10,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624203106] [2021-10-13 08:02:10,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:02:10,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:02:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:02:10,398 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:10,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:10,683 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-10-13 08:02:10,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 08:02:10,683 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-13 08:02:10,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:10,684 INFO L225 Difference]: With dead ends: 45 [2021-10-13 08:02:10,685 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 08:02:10,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:02:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 08:02:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-10-13 08:02:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-10-13 08:02:10,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-10-13 08:02:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:10,692 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-10-13 08:02:10,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-10-13 08:02:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 08:02:10,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:10,694 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:10,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:10,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:10,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:10,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:10,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-10-13 08:02:10,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:10,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699755000] [2021-10-13 08:02:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:10,916 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:10,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:10,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:10,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:02:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:11,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:02:11,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:11,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:11,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:11,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 08:02:11,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:11,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 33 [2021-10-13 08:02:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:11,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:11,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 24 treesize of output 22 [2021-10-13 08:02:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:11,665 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:11,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699755000] [2021-10-13 08:02:11,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699755000] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:11,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:11,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-10-13 08:02:11,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525448070] [2021-10-13 08:02:11,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 08:02:11,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 08:02:11,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:02:11,669 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:12,203 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-10-13 08:02:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:02:12,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 08:02:12,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:12,206 INFO L225 Difference]: With dead ends: 41 [2021-10-13 08:02:12,206 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 08:02:12,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:02:12,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 08:02:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-10-13 08:02:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-13 08:02:12,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-13 08:02:12,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:12,213 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-13 08:02:12,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:12,213 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-13 08:02:12,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:02:12,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:12,214 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:12,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:12,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:12,415 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:12,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:12,416 INFO L82 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2021-10-13 08:02:12,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:12,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [432963463] [2021-10-13 08:02:12,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:12,417 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:12,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:12,418 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:12,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:02:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:12,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:02:12,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:12,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:13,036 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:13,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [432963463] [2021-10-13 08:02:13,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [432963463] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:13,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1655701248] [2021-10-13 08:02:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:13,037 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:13,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:13,039 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:13,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 08:02:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:13,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:02:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:13,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:13,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1655701248] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-13 08:02:13,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-13 08:02:13,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 7, 7] total 17 [2021-10-13 08:02:13,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243431841] [2021-10-13 08:02:13,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:02:13,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:13,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:02:13,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:02:13,450 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:13,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:13,695 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2021-10-13 08:02:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:02:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 08:02:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:13,697 INFO L225 Difference]: With dead ends: 75 [2021-10-13 08:02:13,697 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 08:02:13,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:02:13,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 08:02:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2021-10-13 08:02:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-13 08:02:13,703 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 21 [2021-10-13 08:02:13,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:13,704 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-13 08:02:13,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-13 08:02:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 08:02:13,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:13,704 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:13,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:13,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:14,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:14,105 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:14,106 INFO L82 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2021-10-13 08:02:14,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:14,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918545939] [2021-10-13 08:02:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:14,107 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:14,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:14,114 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:14,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:02:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:14,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 08:02:14,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:14,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 08:02:14,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:14,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:02:14,598 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 08:02:14,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2021-10-13 08:02:14,929 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:14,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 77 [2021-10-13 08:02:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:02:14,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:24,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:24,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20610 treesize of output 19082 [2021-10-13 08:02:27,821 INFO L354 Elim1Store]: treesize reduction 66, result has 35.9 percent of original size [2021-10-13 08:02:27,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 5141953 treesize of output 4373989 [2021-10-13 08:02:37,333 WARN L207 SmtUtils]: Spent 9.49 s on a formula simplification that was a NOOP. DAG size: 7332 [2021-10-13 08:02:37,430 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:02:37,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918545939] [2021-10-13 08:02:37,431 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:02:37,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26965625] [2021-10-13 08:02:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:37,432 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:02:37,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:02:37,434 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:02:37,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 08:02:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:37,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 08:02:37,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:37,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 08:02:37,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:37,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:02:37,985 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 08:02:37,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2021-10-13 08:02:38,296 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:38,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 77 [2021-10-13 08:02:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:02:38,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:38,458 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 08:02:38,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3270 treesize of output 1 [2021-10-13 08:02:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:02:38,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26965625] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:38,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179008528] [2021-10-13 08:02:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:38,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:38,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:38,490 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:38,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 08:02:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:38,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:02:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:38,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:38,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:38,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 21 [2021-10-13 08:02:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:39,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:39,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:39,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:39,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:02:39,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 08:02:39,023 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-10-13 08:02:39,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 73 [2021-10-13 08:02:39,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:39,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 77 [2021-10-13 08:02:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:02:39,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:40,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:40,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20610 treesize of output 19082 [2021-10-13 08:02:43,045 INFO L354 Elim1Store]: treesize reduction 66, result has 35.9 percent of original size [2021-10-13 08:02:43,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 9995714 treesize of output 8339558 [2021-10-13 08:02:59,512 WARN L207 SmtUtils]: Spent 16.45 s on a formula simplification that was a NOOP. DAG size: 7667 [2021-10-13 08:02:59,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-13 08:02:59,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 08:02:59,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-13 08:02:59,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296145473] [2021-10-13 08:02:59,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:02:59,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:02:59,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:02:59,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=215, Unknown=4, NotChecked=0, Total=272 [2021-10-13 08:02:59,571 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:22,047 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2021-10-13 08:03:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 08:03:22,047 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 08:03:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:22,048 INFO L225 Difference]: With dead ends: 110 [2021-10-13 08:03:22,048 INFO L226 Difference]: Without dead ends: 97 [2021-10-13 08:03:22,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 22296.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1123, Unknown=4, NotChecked=0, Total=1482 [2021-10-13 08:03:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-13 08:03:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 40. [2021-10-13 08:03:22,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-10-13 08:03:22,058 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2021-10-13 08:03:22,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:22,059 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-10-13 08:03:22,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:22,059 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-10-13 08:03:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 08:03:22,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:22,060 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:22,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-13 08:03:22,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:22,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:22,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:03:22,665 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2021-10-13 08:03:22,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:22,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414398125] [2021-10-13 08:03:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:22,671 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:22,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:22,675 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:22,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:03:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:03:23,019 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:03:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:03:23,201 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:03:23,202 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:03:23,203 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:03:23,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:23,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:03:23,418 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:03:23,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:03:23 BoogieIcfgContainer [2021-10-13 08:03:23,497 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:03:23,498 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:03:23,498 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:03:23,498 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:03:23,498 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:09" (3/4) ... [2021-10-13 08:03:23,500 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:03:23,560 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce89713b-998b-4490-a98e-f97982b778f3/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:03:23,562 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:03:23,563 INFO L168 Benchmark]: Toolchain (without parser) took 75300.30 ms. Allocated memory was 58.7 MB in the beginning and 994.1 MB in the end (delta: 935.3 MB). Free memory was 37.2 MB in the beginning and 755.1 MB in the end (delta: -717.9 MB). Peak memory consumption was 216.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,564 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:03:23,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.53 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 41.1 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,564 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.06 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:03:23,565 INFO L168 Benchmark]: Boogie Preprocessor took 56.27 ms. Allocated memory is still 58.7 MB. Free memory was 39.5 MB in the beginning and 38.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,565 INFO L168 Benchmark]: RCFGBuilder took 510.56 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 38.1 MB in the beginning and 62.4 MB in the end (delta: -24.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,566 INFO L168 Benchmark]: TraceAbstraction took 74246.29 ms. Allocated memory was 79.7 MB in the beginning and 994.1 MB in the end (delta: 914.4 MB). Free memory was 62.1 MB in the beginning and 758.2 MB in the end (delta: -696.1 MB). Peak memory consumption was 218.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,566 INFO L168 Benchmark]: Witness Printer took 65.00 ms. Allocated memory is still 994.1 MB. Free memory was 758.2 MB in the beginning and 755.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:23,571 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory is still 39.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 362.53 ms. Allocated memory is still 58.7 MB. Free memory was 37.1 MB in the beginning and 41.1 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.06 ms. Allocated memory is still 58.7 MB. Free memory was 41.1 MB in the beginning and 39.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.27 ms. Allocated memory is still 58.7 MB. Free memory was 39.5 MB in the beginning and 38.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 510.56 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 38.1 MB in the beginning and 62.4 MB in the end (delta: -24.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 74246.29 ms. Allocated memory was 79.7 MB in the beginning and 994.1 MB in the end (delta: 914.4 MB). Free memory was 62.1 MB in the beginning and 758.2 MB in the end (delta: -696.1 MB). Peak memory consumption was 218.2 MB. Max. memory is 16.1 GB. * Witness Printer took 65.00 ms. Allocated memory is still 994.1 MB. Free memory was 758.2 MB in the beginning and 755.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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] i=0 VAL [N=2] [L31] COND TRUE i