./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:00:02,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:00:02,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:00:02,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:00:02,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:00:02,094 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:00:02,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:00:02,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:00:02,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:00:02,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:00:02,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:00:02,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:00:02,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:00:02,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:00:02,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:00:02,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:00:02,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:00:02,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:00:02,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:00:02,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:00:02,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:00:02,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:00:02,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:00:02,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:00:02,127 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:00:02,127 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:00:02,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:00:02,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:00:02,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:00:02,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:00:02,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:00:02,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:00:02,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:00:02,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:00:02,136 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:00:02,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:00:02,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:00:02,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:00:02,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:00:02,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:00:02,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:00:02,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:00:02,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:00:02,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:00:02,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:00:02,169 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:00:02,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:00:02,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:00:02,171 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:00:02,171 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:00:02,172 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:00:02,172 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:00:02,172 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:00:02,173 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:00:02,173 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:00:02,173 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:00:02,174 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:00:02,174 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:00:02,174 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:00:02,175 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:00:02,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:00:02,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:00:02,176 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:00:02,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:00:02,177 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:00:02,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:00:02,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:00:02,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:00:02,178 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:00:02,179 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:00:02,179 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:00:02,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:00:02,179 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:00:02,180 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:00:02,180 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:00:02,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:00:02,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:00:02,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:00:02,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:00:02,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:00:02,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:00:02,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:00:02,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:00:02,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:00:02,183 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_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb589a592aff310a2662d7a22b89559cebd75929901bc5e2cc7816fe45d47c92 [2021-11-25 19:00:02,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:00:02,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:00:02,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:00:02,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:00:02,444 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:00:02,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-11-25 19:00:02,529 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/data/eaf164ad2/80fc1156453144649e84edba7b98fec2/FLAGdaea703e0 [2021-11-25 19:00:02,976 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:00:02,976 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength.c [2021-11-25 19:00:02,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/data/eaf164ad2/80fc1156453144649e84edba7b98fec2/FLAGdaea703e0 [2021-11-25 19:00:03,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/data/eaf164ad2/80fc1156453144649e84edba7b98fec2 [2021-11-25 19:00:03,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:00:03,388 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:00:03,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:00:03,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:00:03,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:00:03,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bb39be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03, skipping insertion in model container [2021-11-25 19:00:03,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:00:03,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:00:03,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:00:03,616 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:00:03,638 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:00:03,648 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:00:03,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03 WrapperNode [2021-11-25 19:00:03,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:00:03,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:00:03,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:00:03,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:00:03,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,678 INFO L137 Inliner]: procedures = 8, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2021-11-25 19:00:03,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:00:03,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:00:03,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:00:03,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:00:03,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:00:03,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:00:03,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:00:03,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:00:03,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (1/1) ... [2021-11-25 19:00:03,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:00:03,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:03,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:00:03,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:00:03,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:00:03,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:00:03,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:00:03,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:00:03,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:00:03,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:00:03,847 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:00:03,850 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:00:04,089 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:00:04,125 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:00:04,126 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 19:00:04,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:00:04 BoogieIcfgContainer [2021-11-25 19:00:04,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:00:04,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:00:04,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:00:04,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:00:04,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:00:03" (1/3) ... [2021-11-25 19:00:04,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69991d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:00:04, skipping insertion in model container [2021-11-25 19:00:04,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:00:03" (2/3) ... [2021-11-25 19:00:04,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69991d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:00:04, skipping insertion in model container [2021-11-25 19:00:04,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:00:04" (3/3) ... [2021-11-25 19:00:04,146 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength.c [2021-11-25 19:00:04,150 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:00:04,150 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-25 19:00:04,215 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:00:04,224 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-25 19:00:04,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-25 19:00:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 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) [2021-11-25 19:00:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:00:04,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:04,253 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:00:04,253 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash 3240188, now seen corresponding path program 1 times [2021-11-25 19:00:04,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:04,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496536224] [2021-11-25 19:00:04,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:04,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:04,455 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:04,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496536224] [2021-11-25 19:00:04,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496536224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:04,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:00:04,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:00:04,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352684601] [2021-11-25 19:00:04,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:04,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:00:04,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:00:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:00:04,504 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 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 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 19:00:04,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:04,586 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-11-25 19:00:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:00:04,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-25 19:00:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:04,597 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:00:04,597 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 19:00:04,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:00:04,604 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:04,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:04,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 19:00:04,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-11-25 19:00:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 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) [2021-11-25 19:00:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-25 19:00:04,639 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2021-11-25 19:00:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:04,640 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-25 19:00:04,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 19:00:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-25 19:00:04,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:00:04,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:04,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:00:04,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:00:04,642 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:04,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash 3168033, now seen corresponding path program 1 times [2021-11-25 19:00:04,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:04,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670351656] [2021-11-25 19:00:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:04,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:04,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:04,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:04,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670351656] [2021-11-25 19:00:04,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670351656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:04,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:00:04,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:00:04,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435203305] [2021-11-25 19:00:04,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:04,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:00:04,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:04,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:00:04,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:00:04,753 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-25 19:00:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:04,845 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-11-25 19:00:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:00:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-11-25 19:00:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:04,849 INFO L225 Difference]: With dead ends: 45 [2021-11-25 19:00:04,850 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 19:00:04,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:00:04,857 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:04,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 22 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 19:00:04,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 21. [2021-11-25 19:00:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 20 states have internal predecessors, (24), 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) [2021-11-25 19:00:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-25 19:00:04,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 4 [2021-11-25 19:00:04,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:04,872 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-25 19:00:04,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-25 19:00:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-25 19:00:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:00:04,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:04,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:00:04,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:00:04,878 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:04,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:04,879 INFO L85 PathProgramCache]: Analyzing trace with hash 3170125, now seen corresponding path program 1 times [2021-11-25 19:00:04,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:04,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347694270] [2021-11-25 19:00:04,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:04,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:04,925 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:04,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347694270] [2021-11-25 19:00:04,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347694270] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:04,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:00:04,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 19:00:04,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947142943] [2021-11-25 19:00:04,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:04,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:00:04,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:04,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:00:04,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:00:04,930 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 19:00:04,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:04,959 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-25 19:00:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:00:04,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-25 19:00:04,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:04,961 INFO L225 Difference]: With dead ends: 19 [2021-11-25 19:00:04,961 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 19:00:04,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:00:04,969 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:04,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:00:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 19:00:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 19:00:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 18 states have internal predecessors, (22), 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) [2021-11-25 19:00:04,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-25 19:00:04,975 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2021-11-25 19:00:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:04,976 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-25 19:00:04,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 19:00:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-25 19:00:04,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:00:04,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:04,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:00:04,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:00:04,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:04,978 INFO L85 PathProgramCache]: Analyzing trace with hash 3170126, now seen corresponding path program 1 times [2021-11-25 19:00:04,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:04,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501892977] [2021-11-25 19:00:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:04,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:05,067 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:05,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501892977] [2021-11-25 19:00:05,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501892977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:05,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:00:05,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 19:00:05,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656927836] [2021-11-25 19:00:05,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:05,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:00:05,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:05,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:00:05,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:00:05,070 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 19:00:05,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:05,106 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-11-25 19:00:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:00:05,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-11-25 19:00:05,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:05,107 INFO L225 Difference]: With dead ends: 20 [2021-11-25 19:00:05,107 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 19:00:05,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:00:05,111 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:05,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:00:05,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 19:00:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-25 19:00:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 19 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) [2021-11-25 19:00:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-25 19:00:05,115 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2021-11-25 19:00:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:05,115 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-25 19:00:05,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-11-25 19:00:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-25 19:00:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:00:05,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:05,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:05,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:00:05,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:05,118 INFO L85 PathProgramCache]: Analyzing trace with hash -46754049, now seen corresponding path program 1 times [2021-11-25 19:00:05,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:05,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276706223] [2021-11-25 19:00:05,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:05,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:05,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:05,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276706223] [2021-11-25 19:00:05,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276706223] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:05,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957951074] [2021-11-25 19:00:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:05,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:05,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:05,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:05,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:00:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:05,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 19:00:05,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:05,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:05,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957951074] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:05,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451567199] [2021-11-25 19:00:05,374 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:05,375 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:05,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:05,384 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:05,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:05,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:05,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-25 19:00:05,816 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-25 19:00:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 176 [2021-11-25 19:00:06,390 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-25 19:00:06,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 176 [2021-11-25 19:00:06,469 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:07,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1451567199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:07,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:07,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2021-11-25 19:00:07,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99485634] [2021-11-25 19:00:07,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:07,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:00:07,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:07,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:00:07,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:00:07,318 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-11-25 19:00:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:07,639 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-25 19:00:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:00:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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 [2021-11-25 19:00:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:07,640 INFO L225 Difference]: With dead ends: 26 [2021-11-25 19:00:07,640 INFO L226 Difference]: Without dead ends: 26 [2021-11-25 19:00:07,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:00:07,642 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:07,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 8 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:07,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-25 19:00:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-25 19:00:07,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-11-25 19:00:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-11-25 19:00:07,646 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 7 [2021-11-25 19:00:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:07,646 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-11-25 19:00:07,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 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) [2021-11-25 19:00:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-11-25 19:00:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 19:00:07,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:07,647 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-11-25 19:00:07,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:07,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:07,870 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:07,870 INFO L85 PathProgramCache]: Analyzing trace with hash -46825228, now seen corresponding path program 1 times [2021-11-25 19:00:07,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:07,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34135622] [2021-11-25 19:00:07,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:07,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:07,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:07,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34135622] [2021-11-25 19:00:07,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34135622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:07,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148549694] [2021-11-25 19:00:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:07,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:07,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:07,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:07,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:00:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:07,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:00:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:08,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:08,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:08,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148549694] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:08,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1092104490] [2021-11-25 19:00:08,072 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-25 19:00:08,072 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:08,072 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:08,072 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:08,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:08,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:08,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:08,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:08,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 193 [2021-11-25 19:00:08,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:08,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 193 [2021-11-25 19:00:08,675 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:09,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1092104490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:09,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:09,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2021-11-25 19:00:09,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330518475] [2021-11-25 19:00:09,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:09,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:00:09,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:00:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:00:09,617 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-25 19:00:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:09,736 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-11-25 19:00:09,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:00:09,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 [2021-11-25 19:00:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:09,737 INFO L225 Difference]: With dead ends: 24 [2021-11-25 19:00:09,737 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:00:09,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:00:09,738 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:09,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:09,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:00:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-25 19:00:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-11-25 19:00:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-25 19:00:09,743 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2021-11-25 19:00:09,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:09,744 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-25 19:00:09,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-11-25 19:00:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-25 19:00:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:00:09,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:09,745 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:09,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:00:09,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 19:00:09,960 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:09,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:09,960 INFO L85 PathProgramCache]: Analyzing trace with hash 894109178, now seen corresponding path program 1 times [2021-11-25 19:00:09,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:09,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170683220] [2021-11-25 19:00:09,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:09,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:10,027 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:10,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170683220] [2021-11-25 19:00:10,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170683220] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:10,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247578828] [2021-11-25 19:00:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:10,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:10,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:10,029 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:10,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:00:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 19:00:10,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:00:10,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247578828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916381431] [2021-11-25 19:00:10,183 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:10,183 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:10,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:10,184 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:10,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:10,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:10,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:10,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:00:10,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:10,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:10,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 212 [2021-11-25 19:00:10,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:10,905 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 16 treesize of output 12 [2021-11-25 19:00:10,987 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 16 treesize of output 12 [2021-11-25 19:00:11,003 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:11,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '495#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_foo_~n#1| |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:00:11,472 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:11,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:11,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-25 19:00:11,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341265776] [2021-11-25 19:00:11,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:11,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:00:11,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:00:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:00:11,474 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2021-11-25 19:00:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:11,665 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-11-25 19:00:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 19:00:11,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) Word has length 10 [2021-11-25 19:00:11,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:11,667 INFO L225 Difference]: With dead ends: 64 [2021-11-25 19:00:11,667 INFO L226 Difference]: Without dead ends: 64 [2021-11-25 19:00:11,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-11-25 19:00:11,668 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 100 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:11,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 24 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:11,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-25 19:00:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2021-11-25 19:00:11,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 32 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) [2021-11-25 19:00:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-25 19:00:11,673 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 10 [2021-11-25 19:00:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:11,673 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-25 19:00:11,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 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) [2021-11-25 19:00:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-25 19:00:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:00:11,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:11,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:11,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:11,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:00:11,889 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:11,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash 894111271, now seen corresponding path program 1 times [2021-11-25 19:00:11,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:11,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413850040] [2021-11-25 19:00:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:11,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:11,960 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413850040] [2021-11-25 19:00:11,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413850040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165558184] [2021-11-25 19:00:11,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:11,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:11,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:11,977 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:11,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:00:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:12,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:00:12,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:12,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-25 19:00:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:12,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:12,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165558184] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:12,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1807795241] [2021-11-25 19:00:12,232 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:12,232 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:12,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:12,233 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:12,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:12,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:12,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:12,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:12,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:12,528 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-25 19:00:12,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 200 [2021-11-25 19:00:12,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:12,885 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 16 treesize of output 12 [2021-11-25 19:00:12,975 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 16 treesize of output 12 [2021-11-25 19:00:12,986 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:13,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '677#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_foo_~size#1| |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (< (select |#length| |ULTIMATE.start_main_~#b~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~1#1|) |ULTIMATE.start_main_~#b~0#1.offset| 4)) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~n#1|))' at error location [2021-11-25 19:00:13,548 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:13,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:13,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2021-11-25 19:00:13,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959300310] [2021-11-25 19:00:13,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:13,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:00:13,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:00:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:00:13,550 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-11-25 19:00:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:13,669 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2021-11-25 19:00:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:00:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 10 [2021-11-25 19:00:13,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:13,670 INFO L225 Difference]: With dead ends: 54 [2021-11-25 19:00:13,671 INFO L226 Difference]: Without dead ends: 54 [2021-11-25 19:00:13,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:00:13,672 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:13,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 25 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-25 19:00:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-11-25 19:00:13,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 48 states have internal predecessors, (62), 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) [2021-11-25 19:00:13,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2021-11-25 19:00:13,686 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 10 [2021-11-25 19:00:13,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:13,686 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2021-11-25 19:00:13,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-11-25 19:00:13,687 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2021-11-25 19:00:13,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:00:13,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:13,688 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 19:00:13,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 19:00:13,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:13,908 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:13,908 INFO L85 PathProgramCache]: Analyzing trace with hash -917063813, now seen corresponding path program 2 times [2021-11-25 19:00:13,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:13,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047690766] [2021-11-25 19:00:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:13,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:13,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:00:13,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:13,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047690766] [2021-11-25 19:00:13,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047690766] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:13,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:00:13,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:00:13,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004750794] [2021-11-25 19:00:13,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:13,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:00:13,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:13,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:00:13,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:00:13,959 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2021-11-25 19:00:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:14,007 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2021-11-25 19:00:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:00:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 13 [2021-11-25 19:00:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:14,008 INFO L225 Difference]: With dead ends: 76 [2021-11-25 19:00:14,008 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 19:00:14,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:00:14,009 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:14,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:00:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 19:00:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 53. [2021-11-25 19:00:14,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 52 states have internal predecessors, (68), 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) [2021-11-25 19:00:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-11-25 19:00:14,020 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 13 [2021-11-25 19:00:14,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:14,020 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-11-25 19:00:14,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2021-11-25 19:00:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-11-25 19:00:14,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:00:14,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:14,022 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 19:00:14,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 19:00:14,022 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:14,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:14,023 INFO L85 PathProgramCache]: Analyzing trace with hash 332416397, now seen corresponding path program 3 times [2021-11-25 19:00:14,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:14,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975926833] [2021-11-25 19:00:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:14,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:00:14,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:14,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975926833] [2021-11-25 19:00:14,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975926833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:14,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902291294] [2021-11-25 19:00:14,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:00:14,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:14,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:14,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:14,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:00:14,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:00:14,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:00:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 19:00:14,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:00:14,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:00:14,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902291294] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:14,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773272898] [2021-11-25 19:00:14,205 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:14,205 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:14,205 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:14,205 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:14,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:14,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:14,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:14,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:14,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:14,504 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-25 19:00:14,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 200 [2021-11-25 19:00:14,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:14,837 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 16 treesize of output 12 [2021-11-25 19:00:14,898 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 16 treesize of output 12 [2021-11-25 19:00:14,942 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:15,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1006#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_foo_~n#1| |ULTIMATE.start_foo_~i~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~n#1|))' at error location [2021-11-25 19:00:15,455 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:15,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:15,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-25 19:00:15,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238198483] [2021-11-25 19:00:15,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:15,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:00:15,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:00:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:00:15,456 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-11-25 19:00:15,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:15,513 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-25 19:00:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:00:15,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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 13 [2021-11-25 19:00:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:15,514 INFO L225 Difference]: With dead ends: 49 [2021-11-25 19:00:15,514 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 19:00:15,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-25 19:00:15,515 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:15,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 10 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:00:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 19:00:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-11-25 19:00:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.358974358974359) internal successors, (53), 42 states have internal predecessors, (53), 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) [2021-11-25 19:00:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2021-11-25 19:00:15,520 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 13 [2021-11-25 19:00:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:15,520 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2021-11-25 19:00:15,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-11-25 19:00:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2021-11-25 19:00:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:00:15,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:15,522 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2021-11-25 19:00:15,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:15,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 19:00:15,748 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:15,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:15,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1635792922, now seen corresponding path program 1 times [2021-11-25 19:00:15,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:15,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041264308] [2021-11-25 19:00:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:15,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:15,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:15,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:15,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041264308] [2021-11-25 19:00:15,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041264308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:15,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105621220] [2021-11-25 19:00:15,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:15,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:15,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:15,789 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:15,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:00:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:15,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-25 19:00:15,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:15,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:15,912 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-25 19:00:15,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2021-11-25 19:00:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:15,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105621220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:15,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1185307916] [2021-11-25 19:00:15,929 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:15,930 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:15,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:15,930 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:15,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:15,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:15,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:16,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:16,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:16,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:16,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 212 [2021-11-25 19:00:16,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:16,645 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 16 treesize of output 12 [2021-11-25 19:00:16,701 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 16 treesize of output 12 [2021-11-25 19:00:16,737 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:17,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1191#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (not (= (select |#valid| |ULTIMATE.start_foo_~b#1.base|) 1)) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:00:17,228 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:17,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:17,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2021-11-25 19:00:17,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892490907] [2021-11-25 19:00:17,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:17,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:00:17,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:17,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:00:17,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:00:17,230 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-25 19:00:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:17,256 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-11-25 19:00:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:00:17,256 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2021-11-25 19:00:17,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:17,257 INFO L225 Difference]: With dead ends: 42 [2021-11-25 19:00:17,257 INFO L226 Difference]: Without dead ends: 42 [2021-11-25 19:00:17,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:00:17,259 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:17,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:00:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-25 19:00:17,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-25 19:00:17,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 41 states have internal predecessors, (51), 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) [2021-11-25 19:00:17,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-25 19:00:17,264 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 14 [2021-11-25 19:00:17,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:17,265 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-25 19:00:17,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-25 19:00:17,265 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-25 19:00:17,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:00:17,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:17,266 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1] [2021-11-25 19:00:17,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:17,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:00:17,472 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:17,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1635792923, now seen corresponding path program 1 times [2021-11-25 19:00:17,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:17,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264203789] [2021-11-25 19:00:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:17,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:17,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:00:17,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:17,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264203789] [2021-11-25 19:00:17,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264203789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:17,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60384658] [2021-11-25 19:00:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:17,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:17,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:17,540 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:17,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:00:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:17,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 19:00:17,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:17,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-25 19:00:17,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:00:17,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:00:17,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60384658] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1029886294] [2021-11-25 19:00:17,736 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:17,736 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:17,737 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:17,737 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:17,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:17,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:17,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:17,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:00:17,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:18,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:18,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 212 [2021-11-25 19:00:18,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:18,405 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 16 treesize of output 12 [2021-11-25 19:00:18,468 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 16 treesize of output 12 [2021-11-25 19:00:18,494 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:18,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1368#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (< (select |#length| |ULTIMATE.start_foo_~b#1.base|) (+ (* 4 |ULTIMATE.start_foo_~i~0#1|) 4 |ULTIMATE.start_foo_~b#1.offset|)) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|) (= |#NULL.base| 0))' at error location [2021-11-25 19:00:18,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:18,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:18,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-11-25 19:00:18,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469099254] [2021-11-25 19:00:18,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:18,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:00:18,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:18,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:00:18,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:00:18,926 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-11-25 19:00:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:18,992 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2021-11-25 19:00:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:00:18,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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 14 [2021-11-25 19:00:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:18,994 INFO L225 Difference]: With dead ends: 70 [2021-11-25 19:00:18,994 INFO L226 Difference]: Without dead ends: 70 [2021-11-25 19:00:18,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:00:18,995 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:18,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 8 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:00:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-25 19:00:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-11-25 19:00:19,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 49 states have internal predecessors, (63), 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) [2021-11-25 19:00:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2021-11-25 19:00:19,003 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 14 [2021-11-25 19:00:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:19,003 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2021-11-25 19:00:19,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 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) [2021-11-25 19:00:19,004 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2021-11-25 19:00:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 19:00:19,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:19,004 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1] [2021-11-25 19:00:19,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:19,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:00:19,220 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:19,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:19,220 INFO L85 PathProgramCache]: Analyzing trace with hash 39022099, now seen corresponding path program 4 times [2021-11-25 19:00:19,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:19,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081018344] [2021-11-25 19:00:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:19,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:19,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:19,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:19,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081018344] [2021-11-25 19:00:19,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081018344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:19,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512649926] [2021-11-25 19:00:19,283 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:00:19,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:19,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:19,284 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:19,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:00:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:19,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:00:19,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:19,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:19,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512649926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:19,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363588682] [2021-11-25 19:00:19,475 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:19,475 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:19,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:19,475 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:19,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:19,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:19,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:19,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:19,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 217 [2021-11-25 19:00:20,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:20,112 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 16 treesize of output 12 [2021-11-25 19:00:20,198 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 16 treesize of output 12 [2021-11-25 19:00:20,227 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:20,762 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1599#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_foo_~n#1| |ULTIMATE.start_foo_~i~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~n#1|))' at error location [2021-11-25 19:00:20,762 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:20,762 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:20,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-25 19:00:20,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182451835] [2021-11-25 19:00:20,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:20,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 19:00:20,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:20,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 19:00:20,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:00:20,764 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-11-25 19:00:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:20,955 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2021-11-25 19:00:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 19:00:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 16 [2021-11-25 19:00:20,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:20,956 INFO L225 Difference]: With dead ends: 77 [2021-11-25 19:00:20,956 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 19:00:20,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-11-25 19:00:20,958 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:20,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 22 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 19:00:20,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2021-11-25 19:00:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 47 states have (on average 1.297872340425532) internal successors, (61), 49 states have internal predecessors, (61), 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) [2021-11-25 19:00:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-11-25 19:00:20,963 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 16 [2021-11-25 19:00:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:20,963 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-11-25 19:00:20,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-11-25 19:00:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-11-25 19:00:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:00:20,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:20,965 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1] [2021-11-25 19:00:21,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:21,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:21,192 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:21,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:21,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1428680581, now seen corresponding path program 5 times [2021-11-25 19:00:21,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:21,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269292907] [2021-11-25 19:00:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:21,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:00:21,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:21,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269292907] [2021-11-25 19:00:21,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269292907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:21,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456815199] [2021-11-25 19:00:21,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:00:21,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:21,258 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:21,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:00:21,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:00:21,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:00:21,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:00:21,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:00:21,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 19:00:21,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456815199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:21,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987672057] [2021-11-25 19:00:21,494 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:21,494 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:21,494 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:21,494 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:21,495 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:21,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:21,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:21,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:21,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:21,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:21,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 217 [2021-11-25 19:00:22,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:22,167 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 16 treesize of output 12 [2021-11-25 19:00:22,243 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 16 treesize of output 12 [2021-11-25 19:00:22,270 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:22,736 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_foo_~n#1| |ULTIMATE.start_foo_~i~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_foo_~n#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~n#1|))' at error location [2021-11-25 19:00:22,736 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:22,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:22,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 16 [2021-11-25 19:00:22,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135132125] [2021-11-25 19:00:22,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:22,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 19:00:22,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:22,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 19:00:22,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:00:22,739 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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) [2021-11-25 19:00:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:23,035 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2021-11-25 19:00:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:00:23,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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 19 [2021-11-25 19:00:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:23,036 INFO L225 Difference]: With dead ends: 53 [2021-11-25 19:00:23,036 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 19:00:23,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-11-25 19:00:23,038 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 135 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:23,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 7 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 19:00:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-11-25 19:00:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 46 states have internal predecessors, (55), 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) [2021-11-25 19:00:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2021-11-25 19:00:23,043 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 19 [2021-11-25 19:00:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:23,043 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2021-11-25 19:00:23,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 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) [2021-11-25 19:00:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2021-11-25 19:00:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:00:23,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:23,044 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 1, 1] [2021-11-25 19:00:23,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:23,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:23,260 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:23,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1176886260, now seen corresponding path program 2 times [2021-11-25 19:00:23,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:23,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852972675] [2021-11-25 19:00:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:23,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 19:00:23,324 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:23,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852972675] [2021-11-25 19:00:23,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852972675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:23,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916066429] [2021-11-25 19:00:23,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:00:23,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:23,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:23,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:00:23,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 19:00:23,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:00:23,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:00:23,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:23,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-25 19:00:23,559 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:00:23,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-25 19:00:23,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916066429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:23,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188067205] [2021-11-25 19:00:23,871 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 19:00:23,871 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:23,871 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:23,871 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:23,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:23,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:23,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:23,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:24,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:24,154 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-25 19:00:24,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 200 [2021-11-25 19:00:24,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:24,455 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 16 treesize of output 12 [2021-11-25 19:00:24,532 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 16 treesize of output 12 [2021-11-25 19:00:24,566 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:25,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2171#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (<= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (< (select |#length| |ULTIMATE.start_foo_~b#1.base|) (+ (* 4 |ULTIMATE.start_foo_~i~0#1|) 4 |ULTIMATE.start_foo_~b#1.offset|)) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~n#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~#b~0#1.offset|) (<= 0 |#StackHeapBarrier|) (< |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (<= 0 |ULTIMATE.start_foo_#in~n#1|))' at error location [2021-11-25 19:00:25,099 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:25,099 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:25,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2021-11-25 19:00:25,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315175855] [2021-11-25 19:00:25,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:25,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 19:00:25,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 19:00:25,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:00:25,101 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 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) [2021-11-25 19:00:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:25,414 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-11-25 19:00:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:00:25,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 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 26 [2021-11-25 19:00:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:25,415 INFO L225 Difference]: With dead ends: 50 [2021-11-25 19:00:25,416 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 19:00:25,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:00:25,417 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:25,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 16 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:00:25,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 19:00:25,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-11-25 19:00:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 43 states have internal predecessors, (50), 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) [2021-11-25 19:00:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-11-25 19:00:25,421 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 26 [2021-11-25 19:00:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:25,421 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-11-25 19:00:25,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 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) [2021-11-25 19:00:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-11-25 19:00:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-25 19:00:25,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:25,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:25,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:25,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:00:25,648 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash -834078593, now seen corresponding path program 1 times [2021-11-25 19:00:25,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:25,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251028027] [2021-11-25 19:00:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:25,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 19:00:25,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:25,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251028027] [2021-11-25 19:00:25,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251028027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:25,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986814289] [2021-11-25 19:00:25,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:25,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:25,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:25,715 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:25,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:00:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:00:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:00:25,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:00:26,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986814289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:26,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134901436] [2021-11-25 19:00:26,013 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 19:00:26,013 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:26,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:26,013 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:26,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:26,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:26,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:26,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:26,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:26,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:26,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 227 treesize of output 217 [2021-11-25 19:00:26,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:26,654 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 16 treesize of output 12 [2021-11-25 19:00:26,731 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 16 treesize of output 12 [2021-11-25 19:00:26,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-11-25 19:00:26,825 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:27,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2504#(and (= |ULTIMATE.start_main_~i~1#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_29| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_29|) 0) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_29|) (or (and (<= (+ (* 4 |ULTIMATE.start_main_~i~1#1|) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_29|)) (<= 0 (* 4 |ULTIMATE.start_main_~i~1#1|)) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~i~1#1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |#NULL.base| 0)) (and (<= (+ (* 4 |ULTIMATE.start_main_~i~1#1|) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_29|)) (<= 0 (* 4 |ULTIMATE.start_main_~i~1#1|)) (= |ULTIMATE.start_foo_~i~0#1| 0) (= |#NULL.offset| 0) (not (= |ULTIMATE.start_main_~i~1#1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_29|) (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |#NULL.base| 0))))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1))' at error location [2021-11-25 19:00:27,500 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:27,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:27,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2021-11-25 19:00:27,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580286619] [2021-11-25 19:00:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:27,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:00:27,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:00:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:00:27,502 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 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) [2021-11-25 19:00:27,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:27,871 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-11-25 19:00:27,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 19:00:27,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 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 33 [2021-11-25 19:00:27,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:27,872 INFO L225 Difference]: With dead ends: 91 [2021-11-25 19:00:27,872 INFO L226 Difference]: Without dead ends: 91 [2021-11-25 19:00:27,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=368, Invalid=1612, Unknown=0, NotChecked=0, Total=1980 [2021-11-25 19:00:27,874 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 195 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:27,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 23 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:00:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-25 19:00:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-11-25 19:00:27,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 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) [2021-11-25 19:00:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-11-25 19:00:27,878 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 33 [2021-11-25 19:00:27,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:27,878 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-11-25 19:00:27,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 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) [2021-11-25 19:00:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-11-25 19:00:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 19:00:27,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:27,880 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:27,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:28,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 19:00:28,081 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:28,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:28,081 INFO L85 PathProgramCache]: Analyzing trace with hash 235722060, now seen corresponding path program 2 times [2021-11-25 19:00:28,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:28,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225611011] [2021-11-25 19:00:28,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:28,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-25 19:00:28,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:28,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225611011] [2021-11-25 19:00:28,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225611011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:28,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389314610] [2021-11-25 19:00:28,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:00:28,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:28,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:28,228 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:28,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:00:28,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 19:00:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:00:28,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:00:28,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2021-11-25 19:00:28,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:00:28,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389314610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:28,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:00:28,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2021-11-25 19:00:28,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741367193] [2021-11-25 19:00:28,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:28,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:00:28,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:28,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:00:28,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:00:28,554 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-11-25 19:00:28,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:28,558 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-11-25 19:00:28,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:00:28,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 48 [2021-11-25 19:00:28,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:28,559 INFO L225 Difference]: With dead ends: 63 [2021-11-25 19:00:28,559 INFO L226 Difference]: Without dead ends: 62 [2021-11-25 19:00:28,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:00:28,560 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:28,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2021-11-25 19:00:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-25 19:00:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-25 19:00:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 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) [2021-11-25 19:00:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2021-11-25 19:00:28,564 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 48 [2021-11-25 19:00:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:28,565 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2021-11-25 19:00:28,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2021-11-25 19:00:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2021-11-25 19:00:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:00:28,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:28,567 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:00:28,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:28,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:00:28,787 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash 122028562, now seen corresponding path program 1 times [2021-11-25 19:00:28,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:28,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013555061] [2021-11-25 19:00:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:28,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-25 19:00:28,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:28,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013555061] [2021-11-25 19:00:28,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013555061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073632496] [2021-11-25 19:00:28,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:28,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:28,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:28,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:00:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 19:00:29,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:00:29,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 82 proven. 88 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-25 19:00:29,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073632496] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:29,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [807491363] [2021-11-25 19:00:29,332 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 19:00:29,332 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:29,332 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:29,332 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:29,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:29,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:29,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:29,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 19:00:29,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:29,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:00:29,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 212 [2021-11-25 19:00:29,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:29,929 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 16 treesize of output 12 [2021-11-25 19:00:30,071 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 16 treesize of output 12 [2021-11-25 19:00:30,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 9 [2021-11-25 19:00:30,177 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:30,769 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3301#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_32| Int)) (and (not (= |ULTIMATE.start_main_~i~1#1| (select (select |#memory_int| |v_ULTIMATE.start_main_~#b~0#1.base_32|) (* |ULTIMATE.start_main_~i~1#1| 4)))) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_32|) 0) (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_32|) (<= (+ (* 4 |ULTIMATE.start_main_~i~1#1|) 4) (select |#length| |v_ULTIMATE.start_main_~#b~0#1.base_32|)))) (<= 0 (* 4 |ULTIMATE.start_main_~i~1#1|)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 1) (= |#NULL.base| 0))' at error location [2021-11-25 19:00:30,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:30,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:30,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2021-11-25 19:00:30,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122159209] [2021-11-25 19:00:30,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:30,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 19:00:30,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:30,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 19:00:30,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:00:30,772 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 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) [2021-11-25 19:00:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:31,382 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2021-11-25 19:00:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-25 19:00:31,382 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 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 51 [2021-11-25 19:00:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:31,383 INFO L225 Difference]: With dead ends: 115 [2021-11-25 19:00:31,383 INFO L226 Difference]: Without dead ends: 115 [2021-11-25 19:00:31,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=519, Invalid=2561, Unknown=0, NotChecked=0, Total=3080 [2021-11-25 19:00:31,385 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 247 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:31,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 33 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:00:31,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-25 19:00:31,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 83. [2021-11-25 19:00:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 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) [2021-11-25 19:00:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-11-25 19:00:31,389 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 51 [2021-11-25 19:00:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:31,389 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-11-25 19:00:31,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 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) [2021-11-25 19:00:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-11-25 19:00:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-25 19:00:31,396 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:31,396 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:00:31,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-25 19:00:31,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 19:00:31,616 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 352614233, now seen corresponding path program 2 times [2021-11-25 19:00:31,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:31,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874193354] [2021-11-25 19:00:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:31,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 346 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-25 19:00:31,725 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:31,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874193354] [2021-11-25 19:00:31,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874193354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:31,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316082590] [2021-11-25 19:00:31,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:00:31,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:31,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:31,727 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:31,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:00:31,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 19:00:31,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:00:31,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:00:31,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-11-25 19:00:32,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:00:32,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316082590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:32,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:00:32,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2021-11-25 19:00:32,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778157629] [2021-11-25 19:00:32,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:32,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:00:32,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:00:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:00:32,146 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-11-25 19:00:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:32,149 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2021-11-25 19:00:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:00:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) Word has length 69 [2021-11-25 19:00:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:32,150 INFO L225 Difference]: With dead ends: 84 [2021-11-25 19:00:32,150 INFO L226 Difference]: Without dead ends: 83 [2021-11-25 19:00:32,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:00:32,151 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:32,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2021-11-25 19:00:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-25 19:00:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-11-25 19:00:32,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 82 states have internal predecessors, (87), 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) [2021-11-25 19:00:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-11-25 19:00:32,155 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 69 [2021-11-25 19:00:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:32,155 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-11-25 19:00:32,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-11-25 19:00:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-11-25 19:00:32,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-25 19:00:32,157 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:32,157 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1] [2021-11-25 19:00:32,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:32,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:32,384 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:32,384 INFO L85 PathProgramCache]: Analyzing trace with hash 260105500, now seen corresponding path program 1 times [2021-11-25 19:00:32,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:32,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914999295] [2021-11-25 19:00:32,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:32,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2021-11-25 19:00:32,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:32,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914999295] [2021-11-25 19:00:32,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914999295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:32,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213964553] [2021-11-25 19:00:32,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:32,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:32,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:32,484 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:32,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 19:00:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:32,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:00:32,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 191 proven. 177 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-25 19:00:32,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:00:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 191 proven. 177 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-25 19:00:33,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213964553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:00:33,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625113431] [2021-11-25 19:00:33,119 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 19:00:33,119 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:00:33,119 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:00:33,119 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:00:33,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:00:33,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:00:33,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-25 19:00:33,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-25 19:00:33,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:33,399 INFO L354 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2021-11-25 19:00:33,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 200 [2021-11-25 19:00:33,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 16 [2021-11-25 19:00:33,730 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 16 treesize of output 12 [2021-11-25 19:00:33,798 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 16 treesize of output 12 [2021-11-25 19:00:33,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-25 19:00:33,895 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:00:34,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4453#(and (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_35| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_35|) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_35|) 0))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (<= 100 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:00:34,549 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:00:34,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:00:34,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 25 [2021-11-25 19:00:34,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32659411] [2021-11-25 19:00:34,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:00:34,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-25 19:00:34,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-25 19:00:34,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 19:00:34,551 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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) [2021-11-25 19:00:35,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:35,325 INFO L93 Difference]: Finished difference Result 132 states and 138 transitions. [2021-11-25 19:00:35,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-25 19:00:35,326 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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 82 [2021-11-25 19:00:35,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:35,327 INFO L225 Difference]: With dead ends: 132 [2021-11-25 19:00:35,327 INFO L226 Difference]: Without dead ends: 132 [2021-11-25 19:00:35,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=746, Invalid=3676, Unknown=0, NotChecked=0, Total=4422 [2021-11-25 19:00:35,329 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 288 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:35,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 8 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:00:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-25 19:00:35,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-11-25 19:00:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0566037735849056) internal successors, (112), 106 states have internal predecessors, (112), 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) [2021-11-25 19:00:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-11-25 19:00:35,333 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 82 [2021-11-25 19:00:35,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:35,333 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-11-25 19:00:35,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 25 states have internal predecessors, (90), 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) [2021-11-25 19:00:35,334 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-11-25 19:00:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-25 19:00:35,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:00:35,335 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1] [2021-11-25 19:00:35,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:35,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:35,556 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION (and 5 more)] === [2021-11-25 19:00:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:00:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -34921937, now seen corresponding path program 2 times [2021-11-25 19:00:35,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:00:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539684686] [2021-11-25 19:00:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:00:35,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:00:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:00:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-25 19:00:35,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:00:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539684686] [2021-11-25 19:00:35,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539684686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:00:35,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12543500] [2021-11-25 19:00:35,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:00:35,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:00:35,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:00:35,729 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:00:35,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 19:00:35,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 19:00:35,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:00:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:00:35,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:00:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2021-11-25 19:00:36,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:00:36,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12543500] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:00:36,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:00:36,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 12 [2021-11-25 19:00:36,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005382265] [2021-11-25 19:00:36,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:00:36,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:00:36,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:00:36,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:00:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:00:36,348 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-11-25 19:00:36,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:00:36,351 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2021-11-25 19:00:36,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:00:36,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) Word has length 106 [2021-11-25 19:00:36,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:00:36,352 INFO L225 Difference]: With dead ends: 106 [2021-11-25 19:00:36,352 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:00:36,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-25 19:00:36,356 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:00:36,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 9 Unchecked, 0.0s Time] [2021-11-25 19:00:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:00:36,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:00:36,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2021-11-25 19:00:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:00:36,358 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 106 [2021-11-25 19:00:36,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:00:36,358 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:00:36,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-11-25 19:00:36,358 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:00:36,358 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:00:36,361 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (7 of 8 remaining) [2021-11-25 19:00:36,361 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (6 of 8 remaining) [2021-11-25 19:00:36,362 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (5 of 8 remaining) [2021-11-25 19:00:36,362 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (4 of 8 remaining) [2021-11-25 19:00:36,362 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (3 of 8 remaining) [2021-11-25 19:00:36,362 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (2 of 8 remaining) [2021-11-25 19:00:36,362 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (1 of 8 remaining) [2021-11-25 19:00:36,362 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2021-11-25 19:00:36,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 19:00:36,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-25 19:00:36,591 INFO L732 BasicCegarLoop]: Path program histogram: [5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:00:36,592 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:00:36,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:00:36 BoogieIcfgContainer [2021-11-25 19:00:36,596 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:00:36,596 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:00:36,596 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:00:36,596 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:00:36,597 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:00:04" (3/4) ... [2021-11-25 19:00:36,599 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:00:36,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-11-25 19:00:36,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-25 19:00:36,618 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-25 19:00:36,618 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:00:36,655 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:00:36,655 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:00:36,660 INFO L158 Benchmark]: Toolchain (without parser) took 33268.01ms. Allocated memory was 100.7MB in the beginning and 262.1MB in the end (delta: 161.5MB). Free memory was 67.9MB in the beginning and 130.5MB in the end (delta: -62.6MB). Peak memory consumption was 99.1MB. Max. memory is 16.1GB. [2021-11-25 19:00:36,661 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 100.7MB. Free memory was 56.4MB in the beginning and 56.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:00:36,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.91ms. Allocated memory is still 100.7MB. Free memory was 67.7MB in the beginning and 77.9MB in the end (delta: -10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:00:36,662 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.19ms. Allocated memory is still 100.7MB. Free memory was 77.6MB in the beginning and 76.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:00:36,662 INFO L158 Benchmark]: Boogie Preprocessor took 21.55ms. Allocated memory is still 100.7MB. Free memory was 76.2MB in the beginning and 75.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:00:36,662 INFO L158 Benchmark]: RCFGBuilder took 426.88ms. Allocated memory is still 100.7MB. Free memory was 75.1MB in the beginning and 63.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-25 19:00:36,663 INFO L158 Benchmark]: TraceAbstraction took 32466.32ms. Allocated memory was 100.7MB in the beginning and 262.1MB in the end (delta: 161.5MB). Free memory was 62.9MB in the beginning and 132.6MB in the end (delta: -69.7MB). Peak memory consumption was 93.6MB. Max. memory is 16.1GB. [2021-11-25 19:00:36,663 INFO L158 Benchmark]: Witness Printer took 58.90ms. Allocated memory is still 262.1MB. Free memory was 132.6MB in the beginning and 130.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:00:36,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 100.7MB. Free memory was 56.4MB in the beginning and 56.3MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 258.91ms. Allocated memory is still 100.7MB. Free memory was 67.7MB in the beginning and 77.9MB in the end (delta: -10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.19ms. Allocated memory is still 100.7MB. Free memory was 77.6MB in the beginning and 76.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 21.55ms. Allocated memory is still 100.7MB. Free memory was 76.2MB in the beginning and 75.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 426.88ms. Allocated memory is still 100.7MB. Free memory was 75.1MB in the beginning and 63.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 32466.32ms. Allocated memory was 100.7MB in the beginning and 262.1MB in the end (delta: 161.5MB). Free memory was 62.9MB in the beginning and 132.6MB in the end (delta: -69.7MB). Peak memory consumption was 93.6MB. Max. memory is 16.1GB. * Witness Printer took 58.90ms. Allocated memory is still 262.1MB. Free memory was 132.6MB in the beginning and 130.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 15]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 32.4s, OverallIterations: 21, TraceHistogramMax: 20, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1338 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1338 mSDsluCounter, 294 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 34 IncrementalHoareTripleChecker+Unchecked, 318 mSDsCounter, 519 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2178 IncrementalHoareTripleChecker+Invalid, 2731 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 519 mSolverCounterUnsat, 103 mSDtfsCounter, 2178 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1340 GetRequests, 958 SyntacticMatches, 7 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=20, InterpolantAutomatonStates: 213, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 251 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 1079 NumberOfCodeBlocks, 842 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 1331 ConstructedInterpolants, 220 QuantifiedInterpolants, 7273 SizeOfPredicates, 49 NumberOfNonLiveVariables, 2195 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 50 InterpolantComputations, 8 PerfectInterpolantSequences, 3877/5528 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.7s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 23, TOOLS_POST_TIME: 1.5s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 23, TOOLS_QUANTIFIERELIM_TIME: 1.5s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 45, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME: 1.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 101, DAG_COMPRESSION_RETAINED_NODES: 44, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-25 19:00:36,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05240172-c71a-4b56-8c4a-67afbe61e8d0/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE