./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/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_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54df2940ae4d13c219208dbc33c051105041923e87e99fc1d1620ede83e75392 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:54:07,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:54:07,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:54:07,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:54:07,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:54:07,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:54:07,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:54:07,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:54:07,537 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:54:07,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:54:07,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:54:07,541 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:54:07,541 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:54:07,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:54:07,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:54:07,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:54:07,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:54:07,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:54:07,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:54:07,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:54:07,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:54:07,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:54:07,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:54:07,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:54:07,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:54:07,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:54:07,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:54:07,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:54:07,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:54:07,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:54:07,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:54:07,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:54:07,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:54:07,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:54:07,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:54:07,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:54:07,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:54:07,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:54:07,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:54:07,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:54:07,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:54:07,573 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:54:07,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:54:07,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:54:07,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:54:07,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:54:07,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:54:07,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:54:07,599 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:54:07,599 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:54:07,599 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:54:07,599 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:54:07,600 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:54:07,600 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:54:07,600 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:54:07,600 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:54:07,600 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:54:07,601 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:54:07,601 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:54:07,601 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:54:07,602 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:54:07,602 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:54:07,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:54:07,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:54:07,603 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:54:07,603 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:54:07,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:54:07,603 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:54:07,604 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:54:07,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:54:07,604 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:54:07,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:54:07,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:54:07,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:54:07,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:54:07,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:54:07,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:54:07,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:54:07,606 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:54:07,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:54:07,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:54:07,607 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:54:07,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:54:07,607 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_add5e15b-0286-4360-bbf5-ca3e696c25bf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54df2940ae4d13c219208dbc33c051105041923e87e99fc1d1620ede83e75392 [2021-11-25 18:54:07,849 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:54:07,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:54:07,886 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:54:07,887 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:54:07,888 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:54:07,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c [2021-11-25 18:54:07,959 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/data/6d4f5b1fd/1ea9cbf8b23840409bb6966179f43791/FLAG995c6c964 [2021-11-25 18:54:08,443 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:54:08,444 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c [2021-11-25 18:54:08,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/data/6d4f5b1fd/1ea9cbf8b23840409bb6966179f43791/FLAG995c6c964 [2021-11-25 18:54:08,814 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/data/6d4f5b1fd/1ea9cbf8b23840409bb6966179f43791 [2021-11-25 18:54:08,817 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:54:08,818 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:54:08,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:54:08,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:54:08,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:54:08,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:54:08" (1/1) ... [2021-11-25 18:54:08,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42da67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:08, skipping insertion in model container [2021-11-25 18:54:08,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:54:08" (1/1) ... [2021-11-25 18:54:08,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:54:08,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:54:09,064 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2021-11-25 18:54:09,089 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:54:09,097 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:54:09,108 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/sv-benchmarks/c/array-cav19/array_init_both_ends_multiple_sum.c[424,437] [2021-11-25 18:54:09,115 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:54:09,128 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:54:09,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09 WrapperNode [2021-11-25 18:54:09,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:54:09,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:54:09,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:54:09,130 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:54:09,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,163 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2021-11-25 18:54:09,163 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:54:09,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:54:09,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:54:09,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:54:09,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:54:09,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:54:09,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:54:09,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:54:09,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (1/1) ... [2021-11-25 18:54:09,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:54:09,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:09,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:54:09,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:54:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:54:09,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:54:09,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:54:09,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:54:09,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:54:09,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:54:09,284 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:54:09,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:54:09,363 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:54:09,366 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:54:09,561 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:54:09,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:54:09,593 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 18:54:09,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:54:09 BoogieIcfgContainer [2021-11-25 18:54:09,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:54:09,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:54:09,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:54:09,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:54:09,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:54:08" (1/3) ... [2021-11-25 18:54:09,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277d78df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:54:09, skipping insertion in model container [2021-11-25 18:54:09,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:54:09" (2/3) ... [2021-11-25 18:54:09,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@277d78df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:54:09, skipping insertion in model container [2021-11-25 18:54:09,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:54:09" (3/3) ... [2021-11-25 18:54:09,605 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_both_ends_multiple_sum.c [2021-11-25 18:54:09,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:54:09,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:54:09,655 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:54:09,662 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:54:09,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:54:09,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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 18:54:09,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 18:54:09,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:09,680 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 18:54:09,681 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1566730996, now seen corresponding path program 1 times [2021-11-25 18:54:09,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:09,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156297989] [2021-11-25 18:54:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:09,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:09,941 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 18:54:09,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:09,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156297989] [2021-11-25 18:54:09,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156297989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:09,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:09,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:54:09,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541853090] [2021-11-25 18:54:09,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:09,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:54:09,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:09,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:54:09,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:54:09,996 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 18:54:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:10,043 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2021-11-25 18:54:10,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:54:10,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 6 [2021-11-25 18:54:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:10,054 INFO L225 Difference]: With dead ends: 17 [2021-11-25 18:54:10,054 INFO L226 Difference]: Without dead ends: 8 [2021-11-25 18:54:10,057 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 18:54:10,062 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:10,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:54:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-25 18:54:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-25 18:54:10,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 18:54:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-11-25 18:54:10,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 6 [2021-11-25 18:54:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:10,098 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-11-25 18:54:10,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 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 18:54:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2021-11-25 18:54:10,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 18:54:10,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:10,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:10,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:54:10,102 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:10,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1606658421, now seen corresponding path program 1 times [2021-11-25 18:54:10,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:10,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630934965] [2021-11-25 18:54:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:10,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:54:10,221 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630934965] [2021-11-25 18:54:10,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630934965] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:54:10,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:54:10,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:54:10,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913952026] [2021-11-25 18:54:10,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:54:10,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:54:10,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:10,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:54:10,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:54:10,226 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:10,258 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2021-11-25 18:54:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:54:10,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 18:54:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:10,259 INFO L225 Difference]: With dead ends: 14 [2021-11-25 18:54:10,260 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 18:54:10,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:54:10,266 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:10,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:54:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 18:54:10,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 18:54:10,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-25 18:54:10,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-25 18:54:10,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:10,282 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-25 18:54:10,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-25 18:54:10,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 18:54:10,289 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:10,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:10,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:54:10,290 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2073466838, now seen corresponding path program 1 times [2021-11-25 18:54:10,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138485494] [2021-11-25 18:54:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:10,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:54:10,374 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138485494] [2021-11-25 18:54:10,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138485494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:10,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499175790] [2021-11-25 18:54:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:10,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:10,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:10,377 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:10,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:54:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:10,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:54:10,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:54:10,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:10,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:54:10,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499175790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:54:10,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523739561] [2021-11-25 18:54:10,622 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:54:10,622 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:10,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:10,632 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:10,633 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,865 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 18:54:10,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 53 [2021-11-25 18:54:10,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:10,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:11,001 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:54:11,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:54:11,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:11,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:54:11,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:11,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:11,383 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-25 18:54:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 295 treesize of output 298 [2021-11-25 18:54:11,602 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 18 treesize of output 14 [2021-11-25 18:54:11,637 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 18:54:11,721 INFO L354 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2021-11-25 18:54:11,721 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 78 treesize of output 83 [2021-11-25 18:54:11,793 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 20 treesize of output 16 [2021-11-25 18:54:11,929 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:12,231 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '149#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 18:54:12,234 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:54:12,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:54:12,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-11-25 18:54:12,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465300025] [2021-11-25 18:54:12,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:54:12,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 18:54:12,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:12,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 18:54:12,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:54:12,239 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:12,287 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-25 18:54:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:54:12,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 18:54:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:12,290 INFO L225 Difference]: With dead ends: 20 [2021-11-25 18:54:12,290 INFO L226 Difference]: Without dead ends: 13 [2021-11-25 18:54:12,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-25 18:54:12,297 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:12,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:54:12,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-25 18:54:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-25 18:54:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-25 18:54:12,307 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2021-11-25 18:54:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:12,307 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-25 18:54:12,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-25 18:54:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-25 18:54:12,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:12,309 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:12,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 18:54:12,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:12,528 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:12,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash 866857431, now seen corresponding path program 2 times [2021-11-25 18:54:12,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:12,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253809975] [2021-11-25 18:54:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:12,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:54:12,590 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253809975] [2021-11-25 18:54:12,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253809975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:12,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534937325] [2021-11-25 18:54:12,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:54:12,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:12,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:12,592 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:12,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:54:12,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:54:12,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:54:12,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 18:54:12,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:54:12,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-25 18:54:12,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534937325] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:54:12,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499643496] [2021-11-25 18:54:12,763 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:54:12,764 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:12,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:12,768 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:12,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:12,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:12,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:12,861 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:54:12,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:54:12,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:12,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:12,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:54:12,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:12,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:54:13,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:13,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:13,038 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-25 18:54:13,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 295 treesize of output 298 [2021-11-25 18:54:13,169 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 18 treesize of output 14 [2021-11-25 18:54:13,189 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 18:54:13,234 INFO L354 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2021-11-25 18:54:13,235 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 78 treesize of output 83 [2021-11-25 18:54:13,283 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 20 treesize of output 16 [2021-11-25 18:54:13,367 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:13,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '284#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 18:54:13,600 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:54:13,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:54:13,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-11-25 18:54:13,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038513852] [2021-11-25 18:54:13,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:54:13,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 18:54:13,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 18:54:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-25 18:54:13,602 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 18:54:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:13,685 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2021-11-25 18:54:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 18:54:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-25 18:54:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:13,687 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:54:13,687 INFO L226 Difference]: Without dead ends: 19 [2021-11-25 18:54:13,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-11-25 18:54:13,688 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:13,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:54:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-25 18:54:13,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-25 18:54:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 18:54:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-25 18:54:13,695 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-11-25 18:54:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:13,696 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-25 18:54:13,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 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 18:54:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-25 18:54:13,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:54:13,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:13,697 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:13,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:54:13,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:13,924 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:13,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1509939700, now seen corresponding path program 3 times [2021-11-25 18:54:13,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78171884] [2021-11-25 18:54:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:13,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:54:14,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:14,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78171884] [2021-11-25 18:54:14,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78171884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:14,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28208215] [2021-11-25 18:54:14,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:54:14,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:14,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:14,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:14,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:54:14,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:54:14,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:54:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 18:54:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:54:14,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-25 18:54:14,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28208215] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:54:14,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478613295] [2021-11-25 18:54:14,317 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:54:14,317 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:14,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:14,317 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:14,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:14,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:14,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:14,398 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 18:54:14,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 53 [2021-11-25 18:54:14,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:14,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:14,493 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:54:14,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:54:14,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:14,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:54:14,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:14,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:14,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:14,628 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-11-25 18:54:14,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 300 treesize of output 297 [2021-11-25 18:54:14,688 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 18 treesize of output 14 [2021-11-25 18:54:14,705 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 18:54:14,745 INFO L354 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2021-11-25 18:54:14,746 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 78 treesize of output 83 [2021-11-25 18:54:14,779 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 20 treesize of output 16 [2021-11-25 18:54:14,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:15,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '487#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 18:54:15,085 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:54:15,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:54:15,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2021-11-25 18:54:15,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213498604] [2021-11-25 18:54:15,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:54:15,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:54:15,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:15,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:54:15,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:54:15,087 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 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 18:54:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:15,261 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-11-25 18:54:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:54:15,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 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) Word has length 18 [2021-11-25 18:54:15,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:15,266 INFO L225 Difference]: With dead ends: 50 [2021-11-25 18:54:15,266 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 18:54:15,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-11-25 18:54:15,268 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:15,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 8 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:54:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 18:54:15,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-25 18:54:15,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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 18:54:15,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-25 18:54:15,275 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2021-11-25 18:54:15,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:15,275 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-25 18:54:15,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 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 18:54:15,276 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-25 18:54:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-25 18:54:15,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:15,277 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:15,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 18:54:15,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:15,496 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:15,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:15,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1736480884, now seen corresponding path program 4 times [2021-11-25 18:54:15,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:15,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695478846] [2021-11-25 18:54:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:15,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-25 18:54:15,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:15,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695478846] [2021-11-25 18:54:15,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695478846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:15,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332941625] [2021-11-25 18:54:15,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:54:15,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:15,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:15,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:15,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:54:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 18:54:15,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-25 18:54:16,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-25 18:54:16,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332941625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:54:16,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [594643623] [2021-11-25 18:54:16,298 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:54:16,298 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:16,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:16,298 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:16,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,359 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 18:54:16,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 53 [2021-11-25 18:54:16,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,440 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:54:16,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:54:16,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2021-11-25 18:54:16,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,591 INFO L354 Elim1Store]: treesize reduction 54, result has 11.5 percent of original size [2021-11-25 18:54:16,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 300 treesize of output 297 [2021-11-25 18:54:16,651 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 18 treesize of output 14 [2021-11-25 18:54:16,672 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 20 treesize of output 16 [2021-11-25 18:54:16,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:16,704 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 83 treesize of output 82 [2021-11-25 18:54:16,731 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 20 treesize of output 16 [2021-11-25 18:54:16,778 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:16,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '910#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 18:54:16,932 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:54:16,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:54:16,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2021-11-25 18:54:16,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3860642] [2021-11-25 18:54:16,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:54:16,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-25 18:54:16,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-25 18:54:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=980, Unknown=0, NotChecked=0, Total=1560 [2021-11-25 18:54:16,935 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 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 18:54:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:17,459 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2021-11-25 18:54:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-25 18:54:17,460 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 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 36 [2021-11-25 18:54:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:17,461 INFO L225 Difference]: With dead ends: 98 [2021-11-25 18:54:17,461 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 18:54:17,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=866, Invalid=1684, Unknown=0, NotChecked=0, Total=2550 [2021-11-25 18:54:17,464 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:17,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 4 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 18:54:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 18:54:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-25 18:54:17,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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 18:54:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-11-25 18:54:17,477 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 36 [2021-11-25 18:54:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:17,477 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-11-25 18:54:17,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 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 18:54:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-11-25 18:54:17,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 18:54:17,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:17,481 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:17,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 18:54:17,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:54:17,704 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:17,705 INFO L85 PathProgramCache]: Analyzing trace with hash -815334772, now seen corresponding path program 5 times [2021-11-25 18:54:17,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:17,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720073323] [2021-11-25 18:54:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:17,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-25 18:54:18,228 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:18,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720073323] [2021-11-25 18:54:18,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720073323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:18,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374907760] [2021-11-25 18:54:18,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:54:18,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:18,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:18,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:18,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:54:27,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-25 18:54:27,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:54:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 18:54:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:54:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-25 18:54:27,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:54:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-25 18:54:28,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374907760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:54:28,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699928629] [2021-11-25 18:54:28,700 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-25 18:54:28,701 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:54:28,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:54:28,701 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:54:28,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:54:28,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:28,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:28,777 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:54:28,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:54:28,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:28,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:28,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 39 [2021-11-25 18:54:28,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:28,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 18:54:28,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:54:28,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:54:28,918 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-25 18:54:28,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 295 treesize of output 298 [2021-11-25 18:54:28,985 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 18 treesize of output 14 [2021-11-25 18:54:28,999 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 18:54:29,036 INFO L354 Elim1Store]: treesize reduction 42, result has 30.0 percent of original size [2021-11-25 18:54:29,036 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 78 treesize of output 83 [2021-11-25 18:54:29,114 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 20 treesize of output 16 [2021-11-25 18:54:29,160 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:54:29,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1766#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= ~N~0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2021-11-25 18:54:29,345 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:54:29,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 18:54:29,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2021-11-25 18:54:29,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139828635] [2021-11-25 18:54:29,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 18:54:29,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-25 18:54:29,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:54:29,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-25 18:54:29,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2327, Invalid=3525, Unknown=0, NotChecked=0, Total=5852 [2021-11-25 18:54:29,355 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 73 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 72 states have internal predecessors, (82), 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 18:54:30,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:54:30,561 INFO L93 Difference]: Finished difference Result 194 states and 269 transitions. [2021-11-25 18:54:30,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-25 18:54:30,563 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 72 states have internal predecessors, (82), 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 72 [2021-11-25 18:54:30,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:54:30,565 INFO L225 Difference]: With dead ends: 194 [2021-11-25 18:54:30,565 INFO L226 Difference]: Without dead ends: 145 [2021-11-25 18:54:30,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3701 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3500, Invalid=6400, Unknown=0, NotChecked=0, Total=9900 [2021-11-25 18:54:30,571 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:54:30,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 18:54:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-25 18:54:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-11-25 18:54:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 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 18:54:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2021-11-25 18:54:30,589 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 72 [2021-11-25 18:54:30,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:54:30,589 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2021-11-25 18:54:30,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 72 states have internal predecessors, (82), 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 18:54:30,590 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2021-11-25 18:54:30,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-25 18:54:30,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:54:30,592 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1] [2021-11-25 18:54:30,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-25 18:54:30,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 18:54:30,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:54:30,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:54:30,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1708810380, now seen corresponding path program 6 times [2021-11-25 18:54:30,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:54:30,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365270777] [2021-11-25 18:54:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:54:30,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:54:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:54:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-25 18:54:32,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:54:32,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365270777] [2021-11-25 18:54:32,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365270777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:54:32,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091752080] [2021-11-25 18:54:32,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:54:32,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:54:32,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:54:32,046 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:54:32,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_add5e15b-0286-4360-bbf5-ca3e696c25bf/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process