./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.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_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/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_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/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_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/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 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:23:43,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:23:43,323 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:23:43,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:23:43,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:23:43,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:23:43,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:23:43,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:23:43,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:23:43,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:23:43,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:23:43,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:23:43,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:23:43,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:23:43,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:23:43,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:23:43,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:23:43,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:23:43,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:23:43,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:23:43,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:23:43,440 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:23:43,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:23:43,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:23:43,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:23:43,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:23:43,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:23:43,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:23:43,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:23:43,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:23:43,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:23:43,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:23:43,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:23:43,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:23:43,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:23:43,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:23:43,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:23:43,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:23:43,466 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:23:43,467 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:23:43,468 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:23:43,469 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:23:43,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:23:43,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:23:43,517 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:23:43,517 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:23:43,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:23:43,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:23:43,525 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:23:43,525 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:23:43,525 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:23:43,526 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:23:43,527 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:23:43,527 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:23:43,528 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:23:43,528 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:23:43,528 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:23:43,529 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:23:43,529 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:23:43,529 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:23:43,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:23:43,530 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:23:43,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:23:43,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:23:43,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:23:43,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:23:43,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:23:43,532 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:23:43,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:23:43,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:23:43,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:23:43,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:23:43,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:23:43,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:23:43,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:23:43,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:23:43,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:23:43,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:23:43,537 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:23:43,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:23:43,537 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:23:43,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:23:43,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:23:43,538 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_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07a8b8b198dffd8285677bd0bfdd16b4d1f780e3a9696ef3e27a077e8ff12a49 [2021-11-25 19:23:43,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:23:43,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:23:43,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:23:43,855 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:23:43,856 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:23:43,857 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2021-11-25 19:23:43,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/data/d57f0e98b/ac4f199a9fe443578c288c31adfb7a5b/FLAGb541e7c97 [2021-11-25 19:23:44,443 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:23:44,444 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c [2021-11-25 19:23:44,459 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/data/d57f0e98b/ac4f199a9fe443578c288c31adfb7a5b/FLAGb541e7c97 [2021-11-25 19:23:44,816 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/data/d57f0e98b/ac4f199a9fe443578c288c31adfb7a5b [2021-11-25 19:23:44,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:23:44,820 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:23:44,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:23:44,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:23:44,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:23:44,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:23:44" (1/1) ... [2021-11-25 19:23:44,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250f3778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:44, skipping insertion in model container [2021-11-25 19:23:44,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:23:44" (1/1) ... [2021-11-25 19:23:44,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:23:44,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:23:45,035 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_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2021-11-25 19:23:45,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:23:45,099 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:23:45,116 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_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/sv-benchmarks/c/array-industry-pattern/check_removal_from_set_after_insertion.c[342,355] [2021-11-25 19:23:45,130 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:23:45,146 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:23:45,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45 WrapperNode [2021-11-25 19:23:45,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:23:45,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:23:45,149 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:23:45,149 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:23:45,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,197 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 131 [2021-11-25 19:23:45,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:23:45,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:23:45,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:23:45,199 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:23:45,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:23:45,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:23:45,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:23:45,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:23:45,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (1/1) ... [2021-11-25 19:23:45,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:23:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:23:45,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:23:45,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:23:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:23:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:23:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:23:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:23:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:23:45,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:23:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 19:23:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:23:45,434 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:23:45,436 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:23:45,613 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:23:45,711 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:23:45,711 INFO L301 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-25 19:23:45,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:23:45 BoogieIcfgContainer [2021-11-25 19:23:45,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:23:45,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:23:45,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:23:45,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:23:45,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:23:44" (1/3) ... [2021-11-25 19:23:45,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec75cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:23:45, skipping insertion in model container [2021-11-25 19:23:45,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:23:45" (2/3) ... [2021-11-25 19:23:45,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec75cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:23:45, skipping insertion in model container [2021-11-25 19:23:45,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:23:45" (3/3) ... [2021-11-25 19:23:45,722 INFO L111 eAbstractionObserver]: Analyzing ICFG check_removal_from_set_after_insertion.c [2021-11-25 19:23:45,728 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:23:45,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:23:45,808 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:23:45,817 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 19:23:45,817 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:23:45,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:23:45,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:45,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:23:45,838 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:45,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:45,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1379774409, now seen corresponding path program 1 times [2021-11-25 19:23:45,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:45,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141981000] [2021-11-25 19:23:45,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:45,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:23:46,088 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:46,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141981000] [2021-11-25 19:23:46,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141981000] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:23:46,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:23:46,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:23:46,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298616729] [2021-11-25 19:23:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:23:46,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:23:46,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:23:46,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:23:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:23:46,124 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 16 states have internal predecessors, (26), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:46,181 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2021-11-25 19:23:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:23:46,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 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 19:23:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:46,191 INFO L225 Difference]: With dead ends: 33 [2021-11-25 19:23:46,191 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 19:23:46,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:23:46,198 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:46,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:23:46,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 19:23:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 19:23:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 23 transitions. [2021-11-25 19:23:46,231 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 23 transitions. Word has length 9 [2021-11-25 19:23:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:46,232 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 23 transitions. [2021-11-25 19:23:46,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 23 transitions. [2021-11-25 19:23:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:23:46,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:46,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:23:46,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:23:46,234 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:46,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:46,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1484939476, now seen corresponding path program 1 times [2021-11-25 19:23:46,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:46,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265111776] [2021-11-25 19:23:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:46,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:46,302 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 19:23:46,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:46,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265111776] [2021-11-25 19:23:46,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265111776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:23:46,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:23:46,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:23:46,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861477856] [2021-11-25 19:23:46,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:23:46,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:23:46,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:23:46,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:23:46,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:23:46,307 INFO L87 Difference]: Start difference. First operand 16 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:46,352 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2021-11-25 19:23:46,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:23:46,353 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 19:23:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:46,353 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:23:46,354 INFO L226 Difference]: Without dead ends: 20 [2021-11-25 19:23:46,354 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 19:23:46,356 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:46,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:23:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-25 19:23:46,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-11-25 19:23:46,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 24 transitions. [2021-11-25 19:23:46,362 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 24 transitions. Word has length 10 [2021-11-25 19:23:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:46,363 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 24 transitions. [2021-11-25 19:23:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 24 transitions. [2021-11-25 19:23:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-25 19:23:46,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:46,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:23:46,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:23:46,365 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:46,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:46,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1350556832, now seen corresponding path program 1 times [2021-11-25 19:23:46,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:46,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199294735] [2021-11-25 19:23:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:46,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 19:23:46,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:46,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199294735] [2021-11-25 19:23:46,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199294735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:23:46,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:23:46,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:23:46,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104897635] [2021-11-25 19:23:46,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:23:46,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:23:46,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:23:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:23:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:23:46,465 INFO L87 Difference]: Start difference. First operand 17 states and 24 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:46,496 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2021-11-25 19:23:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:23:46,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-25 19:23:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:46,497 INFO L225 Difference]: With dead ends: 27 [2021-11-25 19:23:46,498 INFO L226 Difference]: Without dead ends: 18 [2021-11-25 19:23:46,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:23:46,500 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:46,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 13 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:23:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-25 19:23:46,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-25 19:23:46,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-25 19:23:46,507 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 13 [2021-11-25 19:23:46,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:46,508 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-25 19:23:46,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:46,509 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-25 19:23:46,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:23:46,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:46,510 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:23:46,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:23:46,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:46,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:46,511 INFO L85 PathProgramCache]: Analyzing trace with hash 141282585, now seen corresponding path program 1 times [2021-11-25 19:23:46,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:46,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862995230] [2021-11-25 19:23:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:46,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:46,717 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 19:23:46,718 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862995230] [2021-11-25 19:23:46,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862995230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:23:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948271984] [2021-11-25 19:23:46,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:46,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:46,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:23:46,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:23:46,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:23:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:46,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:23:46,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:23:46,923 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 19:23:46,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:23:46,969 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 19:23:46,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948271984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:23:46,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1545547366] [2021-11-25 19:23:46,989 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 19:23:46,997 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:23:47,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:23:47,009 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:23:47,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:23:47,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,162 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 19:23:47,163 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 19:23:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,295 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:23:47,300 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 19:23:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:23:47,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:47,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:47,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:47,738 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:23:47,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2021-11-25 19:23:47,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:47,898 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:23:47,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:23:48,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:48,031 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 19:23:48,032 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 30 treesize of output 25 [2021-11-25 19:23:48,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:48,184 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:23:48,185 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 40 treesize of output 30 [2021-11-25 19:23:48,865 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:23:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1545547366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:23:50,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:23:50,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 3, 3] total 12 [2021-11-25 19:23:50,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379335205] [2021-11-25 19:23:50,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:23:50,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:23:50,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:23:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:23:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:23:50,571 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 19:23:51,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:51,261 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-11-25 19:23:51,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:23:51,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 15 [2021-11-25 19:23:51,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:51,263 INFO L225 Difference]: With dead ends: 38 [2021-11-25 19:23:51,263 INFO L226 Difference]: Without dead ends: 24 [2021-11-25 19:23:51,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-25 19:23:51,265 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:51,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:23:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-25 19:23:51,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-11-25 19:23:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2021-11-25 19:23:51,275 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2021-11-25 19:23:51,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:51,275 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-11-25 19:23:51,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 19:23:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2021-11-25 19:23:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:23:51,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:51,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:23:51,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:23:51,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:51,492 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1119880071, now seen corresponding path program 1 times [2021-11-25 19:23:51,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:51,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181030129] [2021-11-25 19:23:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:51,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:51,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:23:51,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:51,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181030129] [2021-11-25 19:23:51,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181030129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:23:51,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799461026] [2021-11-25 19:23:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:51,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:51,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:23:51,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:23:51,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:23:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 19:23:51,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:23:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:23:51,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:23:51,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-25 19:23:51,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799461026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:23:51,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [31082749] [2021-11-25 19:23:51,785 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:23:51,786 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:23:51,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:23:51,786 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:23:51,787 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:23:51,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:51,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:51,867 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 19:23:51,867 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 19:23:51,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:51,951 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:23:51,952 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 19:23:52,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:23:52,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:52,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:52,178 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:23:52,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2021-11-25 19:23:52,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:52,278 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:23:52,279 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:23:52,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:52,387 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 19:23:52,387 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 30 treesize of output 25 [2021-11-25 19:23:52,572 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:23:52,572 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 28 treesize of output 27 [2021-11-25 19:23:52,874 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:23:52,874 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 28 treesize of output 27 [2021-11-25 19:23:53,055 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:23:53,055 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 28 treesize of output 27 [2021-11-25 19:23:53,349 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:23:54,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '551#(and (<= ~SIZE~0 (+ |ULTIMATE.start_main_~pos~0#1| 1)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:23:54,283 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:23:54,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:23:54,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-11-25 19:23:54,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293621400] [2021-11-25 19:23:54,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:23:54,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 19:23:54,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:23:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 19:23:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2021-11-25 19:23:54,285 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:54,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:54,489 INFO L93 Difference]: Finished difference Result 84 states and 108 transitions. [2021-11-25 19:23:54,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 19:23:54,490 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 19:23:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:54,491 INFO L225 Difference]: With dead ends: 84 [2021-11-25 19:23:54,491 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 19:23:54,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-11-25 19:23:54,493 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 75 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:54,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 37 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:23:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 19:23:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 30. [2021-11-25 19:23:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-25 19:23:54,503 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 19 [2021-11-25 19:23:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:54,503 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-25 19:23:54,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:54,503 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-25 19:23:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:23:54,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:54,504 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:23:54,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:23:54,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:54,705 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:54,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:54,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1902894455, now seen corresponding path program 2 times [2021-11-25 19:23:54,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:54,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582190645] [2021-11-25 19:23:54,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:54,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 19:23:54,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:54,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582190645] [2021-11-25 19:23:54,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582190645] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:23:54,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93972283] [2021-11-25 19:23:54,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:23:54,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:54,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:23:54,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:23:54,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:23:54,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 19:23:54,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:23:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 19:23:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:23:55,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-25 19:23:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:23:55,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:23:55,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-11-25 19:23:55,299 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-25 19:23:55,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93972283] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:23:55,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525604036] [2021-11-25 19:23:55,302 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:23:55,302 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:23:55,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:23:55,303 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:23:55,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:23:55,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,369 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 19:23:55,369 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 19:23:55,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,446 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:23:55,446 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 19:23:55,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:23:55,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:55,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:55,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:55,648 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:23:55,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2021-11-25 19:23:55,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:55,736 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:23:55,737 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:23:55,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:55,827 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 19:23:55,828 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 30 treesize of output 25 [2021-11-25 19:23:55,991 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:23:55,991 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 28 treesize of output 27 [2021-11-25 19:23:56,278 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:23:56,279 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 28 treesize of output 27 [2021-11-25 19:23:56,455 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:23:56,456 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 28 treesize of output 27 [2021-11-25 19:23:56,716 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:23:57,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '903#(and (<= ~SIZE~0 (+ |ULTIMATE.start_main_~pos~0#1| 1)) (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:23:57,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:23:57,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:23:57,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2021-11-25 19:23:57,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775100616] [2021-11-25 19:23:57,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:23:57,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:23:57,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:23:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:23:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2021-11-25 19:23:57,570 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:23:58,558 INFO L93 Difference]: Finished difference Result 201 states and 246 transitions. [2021-11-25 19:23:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 19:23:58,559 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 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 23 [2021-11-25 19:23:58,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:23:58,562 INFO L225 Difference]: With dead ends: 201 [2021-11-25 19:23:58,566 INFO L226 Difference]: Without dead ends: 177 [2021-11-25 19:23:58,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=924, Invalid=2858, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 19:23:58,572 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 288 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:23:58,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 85 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:23:58,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-25 19:23:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 43. [2021-11-25 19:23:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:58,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-11-25 19:23:58,602 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 23 [2021-11-25 19:23:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:23:58,603 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-11-25 19:23:58,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:23:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-11-25 19:23:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 19:23:58,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:23:58,605 INFO L514 BasicCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:23:58,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:23:58,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:58,812 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:23:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:23:58,813 INFO L85 PathProgramCache]: Analyzing trace with hash -318738090, now seen corresponding path program 1 times [2021-11-25 19:23:58,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:23:58,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336272874] [2021-11-25 19:23:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:58,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:23:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:23:58,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:23:58,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336272874] [2021-11-25 19:23:58,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336272874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:23:58,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354693952] [2021-11-25 19:23:58,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:23:58,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:23:58,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:23:58,948 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:23:58,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:23:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:23:59,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:23:59,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:23:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:23:59,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:23:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:23:59,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354693952] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:23:59,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908903310] [2021-11-25 19:23:59,329 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:23:59,329 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:23:59,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:23:59,330 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:23:59,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:23:59,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:59,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:59,395 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 19:23:59,396 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 19:23:59,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:59,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:59,484 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:23:59,484 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 19:23:59,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:59,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:59,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:23:59,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:59,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:23:59,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:59,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:59,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:23:59,685 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:23:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 340 [2021-11-25 19:24:00,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:00,121 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:24:00,121 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:24:00,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:00,203 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 19:24:00,204 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 30 treesize of output 25 [2021-11-25 19:24:00,351 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:00,354 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 28 treesize of output 27 [2021-11-25 19:24:00,646 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:00,646 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 28 treesize of output 27 [2021-11-25 19:24:00,809 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:00,809 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 28 treesize of output 27 [2021-11-25 19:24:00,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:00,988 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 24 treesize of output 24 [2021-11-25 19:24:01,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:01,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:01,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 94 [2021-11-25 19:24:01,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:01,067 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 24 treesize of output 24 [2021-11-25 19:24:01,149 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:24:01,987 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1541#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= |ULTIMATE.start_elem_exists_~i~0#1| 0) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:24:01,987 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:24:01,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:24:01,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-11-25 19:24:01,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262963898] [2021-11-25 19:24:01,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:24:01,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-25 19:24:01,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-25 19:24:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=986, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:24:01,989 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:02,076 INFO L93 Difference]: Finished difference Result 90 states and 127 transitions. [2021-11-25 19:24:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 19:24:02,077 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-25 19:24:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:02,077 INFO L225 Difference]: With dead ends: 90 [2021-11-25 19:24:02,077 INFO L226 Difference]: Without dead ends: 56 [2021-11-25 19:24:02,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=420, Invalid=986, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 19:24:02,079 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:02,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:24:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-25 19:24:02,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-11-25 19:24:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 51 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2021-11-25 19:24:02,091 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 28 [2021-11-25 19:24:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:02,092 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2021-11-25 19:24:02,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:02,092 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2021-11-25 19:24:02,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-25 19:24:02,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:02,093 INFO L514 BasicCegarLoop]: trace histogram [16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:02,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:02,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:02,300 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash -850733375, now seen corresponding path program 2 times [2021-11-25 19:24:02,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:02,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079359023] [2021-11-25 19:24:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:02,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:24:02,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079359023] [2021-11-25 19:24:02,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079359023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:24:02,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167116134] [2021-11-25 19:24:02,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:24:02,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:02,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:02,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:24:02,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:24:02,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:24:02,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:24:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:24:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-25 19:24:02,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:24:02,973 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2021-11-25 19:24:02,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167116134] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:24:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1945245046] [2021-11-25 19:24:02,976 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:24:02,976 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:24:02,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:24:02,976 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:24:02,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:24:02,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:03,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:03,057 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:24:03,057 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 19:24:03,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:03,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:03,078 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 19:24:03,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:03,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:03,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:24:03,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:03,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:03,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:03,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:03,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:03,282 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:24:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 340 [2021-11-25 19:24:03,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:03,672 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:24:03,673 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:24:03,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:03,747 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:24:03,748 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 40 treesize of output 30 [2021-11-25 19:24:03,906 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:03,906 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 28 treesize of output 27 [2021-11-25 19:24:04,221 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:04,222 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 28 treesize of output 27 [2021-11-25 19:24:04,374 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:04,374 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 28 treesize of output 27 [2021-11-25 19:24:04,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:04,507 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 24 treesize of output 24 [2021-11-25 19:24:04,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:04,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-25 19:24:04,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:04,591 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 24 treesize of output 24 [2021-11-25 19:24:04,673 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:24:05,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2050#(and (<= 0 |ULTIMATE.start_elem_exists_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= |ULTIMATE.start_elem_exists_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:24:05,554 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:24:05,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:24:05,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 5, 5] total 26 [2021-11-25 19:24:05,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689493253] [2021-11-25 19:24:05,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:24:05,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-25 19:24:05,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:05,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-25 19:24:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:24:05,557 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:06,177 INFO L93 Difference]: Finished difference Result 225 states and 278 transitions. [2021-11-25 19:24:06,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-25 19:24:06,178 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-25 19:24:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:06,183 INFO L225 Difference]: With dead ends: 225 [2021-11-25 19:24:06,183 INFO L226 Difference]: Without dead ends: 191 [2021-11-25 19:24:06,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=746, Invalid=2560, Unknown=0, NotChecked=0, Total=3306 [2021-11-25 19:24:06,186 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 338 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:06,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 92 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:24:06,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-25 19:24:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 81. [2021-11-25 19:24:06,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.3375) internal successors, (107), 80 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2021-11-25 19:24:06,228 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 37 [2021-11-25 19:24:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:06,229 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2021-11-25 19:24:06,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2021-11-25 19:24:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:24:06,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:06,239 INFO L514 BasicCegarLoop]: trace histogram [17, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:06,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:06,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:06,464 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:06,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2029273142, now seen corresponding path program 3 times [2021-11-25 19:24:06,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:06,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151449785] [2021-11-25 19:24:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:06,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-25 19:24:06,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:06,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151449785] [2021-11-25 19:24:06,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151449785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:24:06,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817358911] [2021-11-25 19:24:06,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:24:06,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:06,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:06,876 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:24:06,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:24:06,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:24:06,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:24:06,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-25 19:24:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:08,190 INFO L354 Elim1Store]: treesize reduction 128, result has 22.9 percent of original size [2021-11-25 19:24:08,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 60 [2021-11-25 19:24:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-11-25 19:24:09,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:24:12,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 50 [2021-11-25 19:24:12,803 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-25 19:24:12,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 53 [2021-11-25 19:24:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-11-25 19:24:12,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817358911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:24:12,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136234653] [2021-11-25 19:24:12,893 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:24:12,894 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:24:12,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:24:12,894 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:24:12,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:24:12,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:12,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:12,981 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:24:12,982 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 19:24:12,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:12,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:12,998 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 19:24:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:13,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:13,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:24:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:13,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:13,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:13,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:13,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:13,222 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:24:13,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 340 [2021-11-25 19:24:13,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:13,678 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:24:13,678 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:24:13,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:13,935 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:24:13,936 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 40 treesize of output 30 [2021-11-25 19:24:14,318 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:14,318 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 28 treesize of output 27 [2021-11-25 19:24:14,536 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:14,536 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 28 treesize of output 27 [2021-11-25 19:24:14,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:14,701 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 24 treesize of output 24 [2021-11-25 19:24:14,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:14,731 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 24 treesize of output 24 [2021-11-25 19:24:14,886 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:24:16,252 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2921#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:24:16,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:24:16,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:24:16,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 34 [2021-11-25 19:24:16,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693074327] [2021-11-25 19:24:16,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:24:16,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-25 19:24:16,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:16,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-25 19:24:16,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1705, Unknown=2, NotChecked=0, Total=2070 [2021-11-25 19:24:16,255 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:23,962 INFO L93 Difference]: Finished difference Result 155 states and 210 transitions. [2021-11-25 19:24:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-25 19:24:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-25 19:24:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:23,964 INFO L225 Difference]: With dead ends: 155 [2021-11-25 19:24:23,964 INFO L226 Difference]: Without dead ends: 93 [2021-11-25 19:24:23,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=390, Invalid=1959, Unknown=3, NotChecked=0, Total=2352 [2021-11-25 19:24:23,967 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:23,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 43 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2021-11-25 19:24:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-25 19:24:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2021-11-25 19:24:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3333333333333333) internal successors, (116), 87 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 116 transitions. [2021-11-25 19:24:23,993 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 116 transitions. Word has length 50 [2021-11-25 19:24:23,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:23,994 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 116 transitions. [2021-11-25 19:24:23,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 116 transitions. [2021-11-25 19:24:23,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-25 19:24:23,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:23,996 INFO L514 BasicCegarLoop]: trace histogram [18, 6, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:24,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:24,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 19:24:24,211 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:24,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:24,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2128836676, now seen corresponding path program 4 times [2021-11-25 19:24:24,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:24,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150103447] [2021-11-25 19:24:24,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:24,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:24:24,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150103447] [2021-11-25 19:24:24,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150103447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:24:24,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991790951] [2021-11-25 19:24:24,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:24:24,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:24,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:24,614 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:24:24,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:24:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:24,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:24:24,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:24:25,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:24:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:24:25,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991790951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:24:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1035584702] [2021-11-25 19:24:25,784 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:24:25,784 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:24:25,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:24:25,784 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:24:25,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:24:25,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:25,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:25,846 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 19:24:25,846 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 19:24:25,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:25,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:25,934 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:24:25,935 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 19:24:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:25,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:25,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:24:26,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:26,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:26,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:26,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:26,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:26,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:26,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:26,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:26,094 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:24:26,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2021-11-25 19:24:26,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:26,174 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:24:26,175 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:24:26,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:26,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:26,436 INFO L354 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2021-11-25 19:24:26,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 218 [2021-11-25 19:24:27,156 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:27,157 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 28 treesize of output 27 [2021-11-25 19:24:27,465 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:27,465 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 28 treesize of output 27 [2021-11-25 19:24:27,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:27,662 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 24 treesize of output 24 [2021-11-25 19:24:27,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:27,748 INFO L354 Elim1Store]: treesize reduction 117, result has 23.5 percent of original size [2021-11-25 19:24:27,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2021-11-25 19:24:27,817 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2021-11-25 19:24:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:27,836 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 24 treesize of output 24 [2021-11-25 19:24:28,011 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:24:28,924 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3743#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:24:28,924 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:24:28,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:24:28,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2021-11-25 19:24:28,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908216781] [2021-11-25 19:24:28,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:24:28,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-25 19:24:28,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:28,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-25 19:24:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=3197, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 19:24:28,929 INFO L87 Difference]: Start difference. First operand 88 states and 116 transitions. Second operand has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 58 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 19:24:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:29,085 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2021-11-25 19:24:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-25 19:24:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 58 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) Word has length 52 [2021-11-25 19:24:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:29,087 INFO L225 Difference]: With dead ends: 178 [2021-11-25 19:24:29,087 INFO L226 Difference]: Without dead ends: 110 [2021-11-25 19:24:29,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2589 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1773, Invalid=3197, Unknown=0, NotChecked=0, Total=4970 [2021-11-25 19:24:29,090 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:29,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:24:29,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-25 19:24:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-11-25 19:24:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 107 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2021-11-25 19:24:29,142 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 52 [2021-11-25 19:24:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:29,143 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2021-11-25 19:24:29,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.271186440677966) internal successors, (75), 58 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 19:24:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2021-11-25 19:24:29,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-25 19:24:29,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:29,146 INFO L514 BasicCegarLoop]: trace histogram [38, 6, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:29,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:29,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:29,370 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:29,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:29,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1801587332, now seen corresponding path program 5 times [2021-11-25 19:24:29,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:29,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399142680] [2021-11-25 19:24:29,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:29,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-25 19:24:30,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399142680] [2021-11-25 19:24:30,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399142680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:24:30,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617045622] [2021-11-25 19:24:30,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:24:30,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:30,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:30,320 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:24:30,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 19:24:30,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:24:30,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:24:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-25 19:24:30,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:30,926 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-11-25 19:24:30,926 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 24 treesize of output 29 [2021-11-25 19:24:30,995 INFO L354 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2021-11-25 19:24:30,996 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 28 treesize of output 33 [2021-11-25 19:24:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2021-11-25 19:24:31,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:24:31,945 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1473 Int) (v_ArrVal_1474 Int) (|ULTIMATE.start_main_~i~1#1| Int) (|v_ULTIMATE.start_main_~i~1#1_241| Int)) (or (< (+ 2 |v_ULTIMATE.start_main_~i~1#1_241|) c_~SIZE~0) (not (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |c_ULTIMATE.start_main_~#set~0#1.offset|) v_ArrVal_1473) (+ (* |v_ULTIMATE.start_main_~i~1#1_241| 4) |c_ULTIMATE.start_main_~#set~0#1.offset|) v_ArrVal_1474) |c_ULTIMATE.start_main_~#set~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (< (+ |ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_241|))) is different from false [2021-11-25 19:24:32,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-25 19:24:32,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:24:32,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 78 [2021-11-25 19:24:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 793 trivial. 6 not checked. [2021-11-25 19:24:33,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617045622] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:24:33,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [768089607] [2021-11-25 19:24:33,066 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:24:33,066 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:24:33,066 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:24:33,067 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:24:33,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:24:33,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,141 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:24:33,141 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 19:24:33,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,151 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 19:24:33,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:24:33,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:33,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:33,316 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:24:33,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2021-11-25 19:24:33,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:33,388 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:24:33,388 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:24:33,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:33,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:33,612 INFO L354 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2021-11-25 19:24:33,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 218 [2021-11-25 19:24:34,188 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:34,189 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 28 treesize of output 27 [2021-11-25 19:24:34,491 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:34,491 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 28 treesize of output 27 [2021-11-25 19:24:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:34,635 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 24 treesize of output 24 [2021-11-25 19:24:34,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:34,694 INFO L354 Elim1Store]: treesize reduction 117, result has 23.5 percent of original size [2021-11-25 19:24:34,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 99 treesize of output 116 [2021-11-25 19:24:34,748 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 15 iterations. Over-approximation may be very coarse. [2021-11-25 19:24:34,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:34,757 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 24 treesize of output 24 [2021-11-25 19:24:34,913 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:24:35,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4763#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:24:35,928 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:24:35,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:24:35,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 10, 10] total 57 [2021-11-25 19:24:35,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775706843] [2021-11-25 19:24:35,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:24:35,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-25 19:24:35,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:35,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-25 19:24:35,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=3468, Unknown=1, NotChecked=134, Total=4830 [2021-11-25 19:24:35,932 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 57 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:37,871 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ 99998 |c_ULTIMATE.start_main_~i~1#1|) c_~SIZE~0) (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#set~0#1.base|) |c_ULTIMATE.start_main_~#set~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (forall ((v_ArrVal_1473 Int) (v_ArrVal_1474 Int) (|ULTIMATE.start_main_~i~1#1| Int) (|v_ULTIMATE.start_main_~i~1#1_241| Int)) (or (< (+ 2 |v_ULTIMATE.start_main_~i~1#1_241|) c_~SIZE~0) (not (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |c_ULTIMATE.start_main_~#set~0#1.offset|) v_ArrVal_1473) (+ (* |v_ULTIMATE.start_main_~i~1#1_241| 4) |c_ULTIMATE.start_main_~#set~0#1.offset|) v_ArrVal_1474) |c_ULTIMATE.start_main_~#set~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (< (+ |ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_241|))) (<= 100000 c_~SIZE~0) (= |c_ULTIMATE.start_main_~#set~0#1.offset| 0)) is different from false [2021-11-25 19:24:38,472 WARN L838 $PredicateComparison]: unable to prove that (and (not (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#set~0#1.base|) |c_ULTIMATE.start_main_~#set~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (forall ((v_ArrVal_1473 Int) (v_ArrVal_1474 Int) (|ULTIMATE.start_main_~i~1#1| Int) (|v_ULTIMATE.start_main_~i~1#1_241| Int)) (or (< (+ 2 |v_ULTIMATE.start_main_~i~1#1_241|) c_~SIZE~0) (not (= (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |c_ULTIMATE.start_main_~#set~0#1.offset|) v_ArrVal_1473) (+ (* |v_ULTIMATE.start_main_~i~1#1_241| 4) |c_ULTIMATE.start_main_~#set~0#1.offset|) v_ArrVal_1474) |c_ULTIMATE.start_main_~#set~0#1.offset|) |c_ULTIMATE.start_main_~element~0#1|)) (< (+ |ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_241|))) (<= 100000 c_~SIZE~0) (= |c_ULTIMATE.start_main_~#set~0#1.offset| 0)) is different from false [2021-11-25 19:24:42,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:42,119 INFO L93 Difference]: Finished difference Result 588 states and 648 transitions. [2021-11-25 19:24:42,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-11-25 19:24:42,120 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 57 states have internal predecessors, (94), 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 19:24:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:42,124 INFO L225 Difference]: With dead ends: 588 [2021-11-25 19:24:42,124 INFO L226 Difference]: Without dead ends: 520 [2021-11-25 19:24:42,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10081 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=9946, Invalid=25595, Unknown=3, NotChecked=1128, Total=36672 [2021-11-25 19:24:42,135 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 2165 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2165 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:42,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2165 Valid, 195 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 314 Invalid, 0 Unknown, 151 Unchecked, 0.5s Time] [2021-11-25 19:24:42,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-11-25 19:24:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 111. [2021-11-25 19:24:42,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2818181818181817) internal successors, (141), 110 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:42,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2021-11-25 19:24:42,168 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 72 [2021-11-25 19:24:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:42,169 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2021-11-25 19:24:42,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 57 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2021-11-25 19:24:42,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 19:24:42,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:42,171 INFO L514 BasicCegarLoop]: trace histogram [39, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:42,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:42,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 19:24:42,396 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:42,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash 760564487, now seen corresponding path program 6 times [2021-11-25 19:24:42,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:42,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351493900] [2021-11-25 19:24:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:42,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 19:24:43,354 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351493900] [2021-11-25 19:24:43,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351493900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:24:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158347092] [2021-11-25 19:24:43,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:24:43,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:43,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:43,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:24:43,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 19:24:43,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:24:43,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:24:43,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-25 19:24:43,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 19:24:44,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:24:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 19:24:46,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158347092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:24:46,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [60010198] [2021-11-25 19:24:46,762 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:24:46,762 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:24:46,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:24:46,763 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:24:46,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:24:46,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:46,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:46,827 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 19:24:46,828 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 19:24:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:46,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:46,894 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:24:46,895 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 19:24:46,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:46,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:46,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2021-11-25 19:24:46,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:46,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:47,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:47,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:47,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:47,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:47,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:47,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:47,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:47,052 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-25 19:24:47,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 368 treesize of output 336 [2021-11-25 19:24:47,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:47,141 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:24:47,141 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:24:47,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:47,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:24:47,421 INFO L354 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2021-11-25 19:24:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 218 [2021-11-25 19:24:47,777 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:47,777 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 28 treesize of output 27 [2021-11-25 19:24:48,033 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:24:48,034 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 28 treesize of output 27 [2021-11-25 19:24:48,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:48,212 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 24 treesize of output 24 [2021-11-25 19:24:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:24:48,242 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 24 treesize of output 24 [2021-11-25 19:24:48,388 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:24:49,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6692#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:24:49,864 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:24:49,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:24:49,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 121 [2021-11-25 19:24:49,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251677433] [2021-11-25 19:24:49,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:24:49,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-25 19:24:49,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:24:49,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-25 19:24:49,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7044, Invalid=10778, Unknown=0, NotChecked=0, Total=17822 [2021-11-25 19:24:49,869 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 122 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 121 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:50,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:24:50,080 INFO L93 Difference]: Finished difference Result 224 states and 324 transitions. [2021-11-25 19:24:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-25 19:24:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 121 states have internal predecessors, (138), 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 75 [2021-11-25 19:24:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:24:50,082 INFO L225 Difference]: With dead ends: 224 [2021-11-25 19:24:50,082 INFO L226 Difference]: Without dead ends: 154 [2021-11-25 19:24:50,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8805 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7044, Invalid=10778, Unknown=0, NotChecked=0, Total=17822 [2021-11-25 19:24:50,085 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:24:50,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:24:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-25 19:24:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-11-25 19:24:50,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.205298013245033) internal successors, (182), 151 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 182 transitions. [2021-11-25 19:24:50,119 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 182 transitions. Word has length 75 [2021-11-25 19:24:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:24:50,120 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 182 transitions. [2021-11-25 19:24:50,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 121 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:24:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 182 transitions. [2021-11-25 19:24:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-25 19:24:50,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:24:50,122 INFO L514 BasicCegarLoop]: trace histogram [80, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:24:50,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 19:24:50,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 19:24:50,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:24:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:24:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash 655918140, now seen corresponding path program 7 times [2021-11-25 19:24:50,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:24:50,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677650804] [2021-11-25 19:24:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:24:50,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:24:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 19:24:53,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:24:53,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677650804] [2021-11-25 19:24:53,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677650804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:24:53,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077754056] [2021-11-25 19:24:53,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:24:53,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:24:53,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:24:53,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:24:53,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 19:24:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:24:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-25 19:24:53,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:24:56,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 19:24:56,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:25:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 19:25:04,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077754056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:25:04,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [586106783] [2021-11-25 19:25:04,085 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:25:04,085 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:25:04,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:25:04,086 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:25:04,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:25:04,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:04,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:04,163 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:25:04,164 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 19:25:04,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:04,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:04,173 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 19:25:04,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:04,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:25:04,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:04,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:04,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:04,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:04,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:04,321 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:25:04,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 340 [2021-11-25 19:25:04,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:04,560 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:25:04,561 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:25:04,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:04,765 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:25:04,766 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 40 treesize of output 30 [2021-11-25 19:25:05,009 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:25:05,010 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 28 treesize of output 27 [2021-11-25 19:25:05,168 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:25:05,169 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 28 treesize of output 27 [2021-11-25 19:25:05,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:05,295 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 24 treesize of output 24 [2021-11-25 19:25:05,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:05,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:05,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:05,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-25 19:25:05,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:05,343 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 24 treesize of output 24 [2021-11-25 19:25:05,460 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:25:06,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8343#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:25:06,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:25:06,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:25:06,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 244 [2021-11-25 19:25:06,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105317463] [2021-11-25 19:25:06,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:25:06,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 245 states [2021-11-25 19:25:06,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 245 interpolants. [2021-11-25 19:25:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27503, Invalid=38289, Unknown=0, NotChecked=0, Total=65792 [2021-11-25 19:25:06,738 INFO L87 Difference]: Start difference. First operand 152 states and 182 transitions. Second operand has 245 states, 245 states have (on average 1.0653061224489795) internal successors, (261), 244 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:25:07,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:25:07,411 INFO L93 Difference]: Finished difference Result 306 states and 447 transitions. [2021-11-25 19:25:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-11-25 19:25:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 245 states, 245 states have (on average 1.0653061224489795) internal successors, (261), 244 states have internal predecessors, (261), 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 116 [2021-11-25 19:25:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:25:07,414 INFO L225 Difference]: With dead ends: 306 [2021-11-25 19:25:07,414 INFO L226 Difference]: Without dead ends: 236 [2021-11-25 19:25:07,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31109 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=27503, Invalid=38289, Unknown=0, NotChecked=0, Total=65792 [2021-11-25 19:25:07,419 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:25:07,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:25:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-25 19:25:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-11-25 19:25:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.1330472103004292) internal successors, (264), 233 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:25:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 264 transitions. [2021-11-25 19:25:07,468 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 264 transitions. Word has length 116 [2021-11-25 19:25:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:25:07,468 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 264 transitions. [2021-11-25 19:25:07,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 245 states, 245 states have (on average 1.0653061224489795) internal successors, (261), 244 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:25:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 264 transitions. [2021-11-25 19:25:07,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-25 19:25:07,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:25:07,472 INFO L514 BasicCegarLoop]: trace histogram [162, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:25:07,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 19:25:07,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:25:07,684 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:25:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:25:07,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1398769508, now seen corresponding path program 8 times [2021-11-25 19:25:07,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:25:07,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684538125] [2021-11-25 19:25:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:25:07,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:25:08,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:25:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13276 backedges. 0 proven. 13203 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-25 19:25:18,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:25:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684538125] [2021-11-25 19:25:18,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684538125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:25:18,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832598255] [2021-11-25 19:25:18,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:25:18,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:25:18,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:25:18,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:25:18,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 19:25:19,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:25:19,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:25:19,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-25 19:25:19,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:25:19,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-25 19:25:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13276 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 13254 trivial. 0 not checked. [2021-11-25 19:25:20,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:25:21,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-11-25 19:25:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13276 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 13254 trivial. 0 not checked. [2021-11-25 19:25:22,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832598255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:25:22,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [605561074] [2021-11-25 19:25:22,748 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:25:22,749 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:25:22,749 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:25:22,749 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:25:22,749 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:25:22,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:22,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:22,819 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 19:25:22,819 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 19:25:22,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:22,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:22,886 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:25:22,886 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 19:25:22,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:22,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:22,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:25:22,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:22,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:22,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:22,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:22,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:23,038 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:25:23,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 340 [2021-11-25 19:25:23,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:23,306 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:25:23,306 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:25:23,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:23,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:25:23,481 INFO L354 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2021-11-25 19:25:23,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 218 [2021-11-25 19:25:23,978 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:25:23,978 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 28 treesize of output 27 [2021-11-25 19:25:24,199 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:25:24,200 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 28 treesize of output 27 [2021-11-25 19:25:24,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:24,314 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 24 treesize of output 24 [2021-11-25 19:25:24,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:24,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:24,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-25 19:25:24,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:25:24,364 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 24 treesize of output 24 [2021-11-25 19:25:24,479 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:25:26,148 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10755#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:25:26,148 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:25:26,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:25:26,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [164, 12, 12] total 185 [2021-11-25 19:25:26,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018699550] [2021-11-25 19:25:26,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:25:26,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2021-11-25 19:25:26,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:25:26,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2021-11-25 19:25:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15701, Invalid=23305, Unknown=0, NotChecked=0, Total=39006 [2021-11-25 19:25:26,153 INFO L87 Difference]: Start difference. First operand 234 states and 264 transitions. Second operand has 186 states, 186 states have (on average 1.1720430107526882) internal successors, (218), 185 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:26:42,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:26:42,898 INFO L93 Difference]: Finished difference Result 1662 states and 2051 transitions. [2021-11-25 19:26:42,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 516 states. [2021-11-25 19:26:42,899 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.1720430107526882) internal successors, (218), 185 states have internal predecessors, (218), 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 198 [2021-11-25 19:26:42,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:26:42,909 INFO L225 Difference]: With dead ends: 1662 [2021-11-25 19:26:42,909 INFO L226 Difference]: Without dead ends: 1589 [2021-11-25 19:26:42,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1265 GetRequests, 559 SyntacticMatches, 1 SemanticMatches, 705 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156374 ImplicationChecksByTransitivity, 67.5s TimeCoverageRelationStatistics Valid=152172, Invalid=346970, Unknown=0, NotChecked=0, Total=499142 [2021-11-25 19:26:42,936 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4316 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 4128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4316 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 5365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4128 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-25 19:26:42,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4316 Valid, 602 Invalid, 5365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4128 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-25 19:26:42,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2021-11-25 19:26:43,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 554. [2021-11-25 19:26:43,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.3381555153707052) internal successors, (740), 553 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:26:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 740 transitions. [2021-11-25 19:26:43,086 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 740 transitions. Word has length 198 [2021-11-25 19:26:43,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:26:43,086 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 740 transitions. [2021-11-25 19:26:43,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.1720430107526882) internal successors, (218), 185 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:26:43,087 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 740 transitions. [2021-11-25 19:26:43,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-25 19:26:43,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:26:43,090 INFO L514 BasicCegarLoop]: trace histogram [164, 7, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:26:43,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 19:26:43,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 19:26:43,309 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:26:43,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:26:43,310 INFO L85 PathProgramCache]: Analyzing trace with hash 312263366, now seen corresponding path program 9 times [2021-11-25 19:26:43,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:26:43,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706789824] [2021-11-25 19:26:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:26:43,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:26:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:26:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 0 proven. 13530 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-25 19:26:54,938 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:26:54,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706789824] [2021-11-25 19:26:54,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706789824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:26:54,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147051025] [2021-11-25 19:26:54,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 19:26:54,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:26:54,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:26:54,939 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:26:54,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 19:26:55,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 19:26:55,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:26:55,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-25 19:26:55,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:26:56,094 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-25 19:26:56,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 64 [2021-11-25 19:26:56,321 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-25 19:26:56,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 71 [2021-11-25 19:26:56,653 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-25 19:26:56,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 74 [2021-11-25 19:26:56,979 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-25 19:26:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 82 [2021-11-25 19:26:57,349 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-25 19:26:57,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 74 [2021-11-25 19:26:57,687 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-25 19:26:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 79 [2021-11-25 19:26:58,043 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-25 19:26:58,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 74 [2021-11-25 19:26:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 13581 trivial. 0 not checked. [2021-11-25 19:26:58,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:28:02,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 80 [2021-11-25 19:28:02,510 INFO L354 Elim1Store]: treesize reduction 25, result has 41.9 percent of original size [2021-11-25 19:28:02,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29713 treesize of output 22533 [2021-11-25 19:28:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13612 backedges. 12 proven. 16 refuted. 3 times theorem prover too weak. 13581 trivial. 0 not checked. [2021-11-25 19:28:04,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147051025] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:28:04,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [551433233] [2021-11-25 19:28:04,476 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:28:04,476 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:28:04,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:28:04,477 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:28:04,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:28:04,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:04,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:04,551 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-25 19:28:04,552 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 19:28:04,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:04,626 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:28:04,627 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 19:28:04,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:04,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:28:04,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:04,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:04,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:28:04,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:28:04,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:28:04,815 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:28:04,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 340 [2021-11-25 19:28:05,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:28:05,021 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:28:05,021 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:28:05,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:28:05,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:28:05,240 INFO L354 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2021-11-25 19:28:05,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 218 [2021-11-25 19:28:05,722 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:28:05,723 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 28 treesize of output 27 [2021-11-25 19:28:06,033 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:28:06,034 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 28 treesize of output 27 [2021-11-25 19:28:06,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:06,238 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 24 treesize of output 24 [2021-11-25 19:28:06,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:28:06,269 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 24 treesize of output 24 [2021-11-25 19:28:06,448 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:28:09,711 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16716#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:28:09,711 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:28:09,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:28:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [166, 15, 15] total 190 [2021-11-25 19:28:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509378694] [2021-11-25 19:28:09,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:28:09,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2021-11-25 19:28:09,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:28:09,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2021-11-25 19:28:09,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14609, Invalid=25957, Unknown=36, NotChecked=0, Total=40602 [2021-11-25 19:28:09,717 INFO L87 Difference]: Start difference. First operand 554 states and 740 transitions. Second operand has 190 states, 190 states have (on average 1.1473684210526316) internal successors, (218), 190 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:28:11,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:28:11,388 INFO L93 Difference]: Finished difference Result 962 states and 1336 transitions. [2021-11-25 19:28:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2021-11-25 19:28:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 190 states have (on average 1.1473684210526316) internal successors, (218), 190 states have internal predecessors, (218), 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 202 [2021-11-25 19:28:11,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:28:11,392 INFO L225 Difference]: With dead ends: 962 [2021-11-25 19:28:11,392 INFO L226 Difference]: Without dead ends: 574 [2021-11-25 19:28:11,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 772 GetRequests, 568 SyntacticMatches, 2 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7036 ImplicationChecksByTransitivity, 78.5s TimeCoverageRelationStatistics Valid=14629, Invalid=26747, Unknown=36, NotChecked=0, Total=41412 [2021-11-25 19:28:11,398 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 19:28:11,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 61 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 402 Invalid, 0 Unknown, 147 Unchecked, 0.4s Time] [2021-11-25 19:28:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-25 19:28:11,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 564. [2021-11-25 19:28:11,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 1.3339253996447602) internal successors, (751), 563 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:28:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 751 transitions. [2021-11-25 19:28:11,513 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 751 transitions. Word has length 202 [2021-11-25 19:28:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:28:11,514 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 751 transitions. [2021-11-25 19:28:11,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 190 states have (on average 1.1473684210526316) internal successors, (218), 190 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:28:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 751 transitions. [2021-11-25 19:28:11,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-25 19:28:11,517 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:28:11,517 INFO L514 BasicCegarLoop]: trace histogram [165, 7, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:28:11,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 19:28:11,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:28:11,732 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:28:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:28:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash 942742614, now seen corresponding path program 10 times [2021-11-25 19:28:11,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:28:11,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844490967] [2021-11-25 19:28:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:28:11,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:28:12,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13780 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-25 19:28:25,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:28:25,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844490967] [2021-11-25 19:28:25,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844490967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:28:25,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703325175] [2021-11-25 19:28:25,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 19:28:25,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:28:25,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:28:25,704 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:28:25,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 19:28:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:28:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 3152 conjuncts, 168 conjunts are in the unsatisfiable core [2021-11-25 19:28:26,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:28:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 13780 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-25 19:28:40,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:29:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13780 backedges. 0 proven. 13695 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-25 19:29:15,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703325175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:29:15,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577485722] [2021-11-25 19:29:15,924 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:29:15,924 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:29:15,924 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:29:15,924 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:29:15,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:29:15,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:15,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:15,993 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:29:15,994 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 19:29:16,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:16,007 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 19:29:16,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:16,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:29:16,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:16,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:29:16,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:29:16,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:29:16,187 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:29:16,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 340 [2021-11-25 19:29:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:29:16,521 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:29:16,521 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:29:16,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:29:16,690 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:29:16,690 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 40 treesize of output 30 [2021-11-25 19:29:16,939 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:29:16,939 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 28 treesize of output 27 [2021-11-25 19:29:17,098 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:29:17,098 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 28 treesize of output 27 [2021-11-25 19:29:17,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:17,223 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 24 treesize of output 24 [2021-11-25 19:29:17,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:29:17,251 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 24 treesize of output 24 [2021-11-25 19:29:17,357 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:29:19,691 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21446#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:29:19,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:29:19,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:29:19,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [167, 167, 167] total 499 [2021-11-25 19:29:19,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123655254] [2021-11-25 19:29:19,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:29:19,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 500 states [2021-11-25 19:29:19,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:29:19,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 500 interpolants. [2021-11-25 19:29:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112758, Invalid=148874, Unknown=0, NotChecked=0, Total=261632 [2021-11-25 19:29:19,718 INFO L87 Difference]: Start difference. First operand 564 states and 751 transitions. Second operand has 500 states, 500 states have (on average 1.032) internal successors, (516), 499 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:29:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:29:22,595 INFO L93 Difference]: Finished difference Result 1131 states and 1671 transitions. [2021-11-25 19:29:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 334 states. [2021-11-25 19:29:22,596 INFO L78 Accepts]: Start accepts. Automaton has has 500 states, 500 states have (on average 1.032) internal successors, (516), 499 states have internal predecessors, (516), 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 204 [2021-11-25 19:29:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:29:22,600 INFO L225 Difference]: With dead ends: 1131 [2021-11-25 19:29:22,600 INFO L226 Difference]: Without dead ends: 734 [2021-11-25 19:29:22,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 777 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 510 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120189 ImplicationChecksByTransitivity, 62.9s TimeCoverageRelationStatistics Valid=112758, Invalid=148874, Unknown=0, NotChecked=0, Total=261632 [2021-11-25 19:29:22,614 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 19:29:22,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 49 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 19:29:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-11-25 19:29:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 731. [2021-11-25 19:29:22,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 730 states have (on average 1.2575342465753425) internal successors, (918), 730 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:29:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 918 transitions. [2021-11-25 19:29:22,766 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 918 transitions. Word has length 204 [2021-11-25 19:29:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:29:22,767 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 918 transitions. [2021-11-25 19:29:22,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 500 states, 500 states have (on average 1.032) internal successors, (516), 499 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:29:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 918 transitions. [2021-11-25 19:29:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2021-11-25 19:29:22,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:29:22,775 INFO L514 BasicCegarLoop]: trace histogram [332, 7, 6, 6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:29:22,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 19:29:23,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:29:23,000 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:29:23,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:29:23,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1491899615, now seen corresponding path program 11 times [2021-11-25 19:29:23,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:29:23,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094715845] [2021-11-25 19:29:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:29:23,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:29:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:30:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 0 proven. 55278 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-25 19:30:06,765 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:30:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094715845] [2021-11-25 19:30:06,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094715845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:30:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152581814] [2021-11-25 19:30:06,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:30:06,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:30:06,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:30:06,766 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:30:06,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c0cdf431-3207-44aa-89a7-9dcceefbfcfe/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 19:30:08,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:30:08,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:30:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-25 19:30:08,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:30:09,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 22 [2021-11-25 19:30:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 55329 trivial. 0 not checked. [2021-11-25 19:30:09,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:30:12,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 26 [2021-11-25 19:30:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 55329 trivial. 0 not checked. [2021-11-25 19:30:13,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152581814] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:30:13,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [550050484] [2021-11-25 19:30:13,692 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2021-11-25 19:30:13,692 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:30:13,693 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:30:13,693 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:30:13,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:30:13,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:13,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:13,783 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 19:30:13,784 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 19:30:13,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:13,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:13,802 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 19:30:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:13,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:13,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 19:30:13,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:13,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:13,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:13,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:13,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:13,968 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-25 19:30:13,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 350 treesize of output 340 [2021-11-25 19:30:14,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:14,119 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-25 19:30:14,119 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 1 case distinctions, treesize of input 42 treesize of output 29 [2021-11-25 19:30:14,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:30:14,304 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 19:30:14,304 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 40 treesize of output 30 [2021-11-25 19:30:14,555 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:30:14,555 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 28 treesize of output 27 [2021-11-25 19:30:14,741 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-11-25 19:30:14,741 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 28 treesize of output 27 [2021-11-25 19:30:14,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:14,881 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 24 treesize of output 24 [2021-11-25 19:30:14,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:14,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:14,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:14,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 88 [2021-11-25 19:30:14,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:30:14,927 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 24 treesize of output 24 [2021-11-25 19:30:15,145 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:30:18,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27712#(and (= (select (select |#memory_int| |ULTIMATE.start_main_~#set~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) |ULTIMATE.start_main_~#set~0#1.offset|)) |ULTIMATE.start_main_#t~mem20#1|) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~found~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#set~0#1.base|) (= ~SIZE~0 100000) (<= |ULTIMATE.start_main_~element~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~element~0#1|)) (<= 0 |ULTIMATE.start_main_~#values~0#1.base|) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (not (= |ULTIMATE.start_main_#t~mem20#1| |ULTIMATE.start_main_~element~0#1|)) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~n~0#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:30:18,461 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:30:18,461 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:30:18,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [334, 14, 14] total 360 [2021-11-25 19:30:18,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011699464] [2021-11-25 19:30:18,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:30:18,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 361 states [2021-11-25 19:30:18,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:30:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 361 interpolants. [2021-11-25 19:30:18,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64316, Invalid=74440, Unknown=0, NotChecked=0, Total=138756 [2021-11-25 19:30:18,476 INFO L87 Difference]: Start difference. First operand 731 states and 918 transitions. Second operand has 361 states, 361 states have (on average 1.0886426592797784) internal successors, (393), 360 states have internal predecessors, (393), 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)