./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V --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 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:05:45,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:05:45,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:05:45,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:05:45,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:05:45,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:05:45,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:05:45,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:05:45,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:05:45,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:05:45,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:05:45,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:05:45,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:05:45,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:05:45,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:05:45,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:05:45,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:05:45,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:05:45,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:05:45,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:05:45,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:05:45,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:05:45,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:05:45,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:05:45,239 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:05:45,239 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:05:45,240 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:05:45,241 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:05:45,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:05:45,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:05:45,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:05:45,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:05:45,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:05:45,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:05:45,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:05:45,259 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:05:45,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:05:45,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:05:45,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:05:45,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:05:45,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:05:45,265 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:05:45,311 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:05:45,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:05:45,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:05:45,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:05:45,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:05:45,313 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:05:45,313 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:05:45,313 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:05:45,313 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:05:45,313 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:05:45,314 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:05:45,314 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:05:45,314 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:05:45,314 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:05:45,315 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:05:45,315 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:05:45,315 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:05:45,315 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:05:45,316 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:05:45,316 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:05:45,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:05:45,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:05:45,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:05:45,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:05:45,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:05:45,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:05:45,318 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:05:45,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:05:45,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:05:45,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:05:45,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:05:45,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:05:45,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:05:45,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:05:45,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:05:45,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:05:45,321 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:05:45,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:05:45,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:05:45,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:05:45,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:05:45,322 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_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0541c5d3cb2bb522edbd5a6d03bcb344a1d82e4bcd281d695c3c7a0d3bc33956 [2021-11-23 02:05:45,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:05:45,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:05:45,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:05:45,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:05:45,664 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:05:45,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2021-11-23 02:05:45,755 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/data/b652b5012/fbcc72955d26447296eb0a07e95a9b8b/FLAGfbb4ea6ac [2021-11-23 02:05:46,350 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:05:46,351 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2021-11-23 02:05:46,366 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/data/b652b5012/fbcc72955d26447296eb0a07e95a9b8b/FLAGfbb4ea6ac [2021-11-23 02:05:46,715 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/data/b652b5012/fbcc72955d26447296eb0a07e95a9b8b [2021-11-23 02:05:46,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:05:46,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:05:46,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:05:46,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:05:46,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:05:46,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:46" (1/1) ... [2021-11-23 02:05:46,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a737f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:46, skipping insertion in model container [2021-11-23 02:05:46,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:05:46" (1/1) ... [2021-11-23 02:05:46,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:05:46,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:05:46,982 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_053bbca1-c06e-4003-bb3c-83fa150f07af/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2021-11-23 02:05:47,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:05:47,015 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:05:47,026 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_053bbca1-c06e-4003-bb3c-83fa150f07af/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i[816,829] [2021-11-23 02:05:47,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:05:47,052 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:05:47,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47 WrapperNode [2021-11-23 02:05:47,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:05:47,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:05:47,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:05:47,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:05:47,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,069 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,095 INFO L137 Inliner]: procedures = 16, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 131 [2021-11-23 02:05:47,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:05:47,097 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:05:47,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:05:47,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:05:47,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,125 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:05:47,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:05:47,130 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:05:47,130 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:05:47,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (1/1) ... [2021-11-23 02:05:47,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:05:47,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:47,167 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:05:47,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:05:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:05:47,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:05:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:05:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:05:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:05:47,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:05:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:05:47,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:05:47,285 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:05:47,287 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:05:47,499 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:05:47,555 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:05:47,555 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-23 02:05:47,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:47 BoogieIcfgContainer [2021-11-23 02:05:47,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:05:47,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:05:47,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:05:47,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:05:47,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:05:46" (1/3) ... [2021-11-23 02:05:47,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b65ae42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:47, skipping insertion in model container [2021-11-23 02:05:47,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:05:47" (2/3) ... [2021-11-23 02:05:47,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b65ae42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:05:47, skipping insertion in model container [2021-11-23 02:05:47,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:05:47" (3/3) ... [2021-11-23 02:05:47,586 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2021-11-23 02:05:47,593 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:05:47,593 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:05:47,713 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:05:47,723 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 [2021-11-23 02:05:47,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:05:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:05:47,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:47,764 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:47,765 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:47,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:47,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1056001588, now seen corresponding path program 1 times [2021-11-23 02:05:47,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:47,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652067582] [2021-11-23 02:05:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:47,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:05:48,061 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652067582] [2021-11-23 02:05:48,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652067582] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:48,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:05:48,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:05:48,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686188319] [2021-11-23 02:05:48,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:48,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:05:48,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:05:48,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:05:48,125 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2021-11-23 02:05:48,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:48,247 INFO L93 Difference]: Finished difference Result 25 states and 39 transitions. [2021-11-23 02:05:48,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:05:48,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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 [2021-11-23 02:05:48,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:48,262 INFO L225 Difference]: With dead ends: 25 [2021-11-23 02:05:48,262 INFO L226 Difference]: Without dead ends: 13 [2021-11-23 02:05:48,266 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 [2021-11-23 02:05:48,280 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:48,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:05:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-23 02:05:48,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-23 02:05:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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) [2021-11-23 02:05:48,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 19 transitions. [2021-11-23 02:05:48,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 19 transitions. Word has length 10 [2021-11-23 02:05:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:48,332 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-11-23 02:05:48,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 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) [2021-11-23 02:05:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2021-11-23 02:05:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:05:48,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:48,334 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:48,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:05:48,335 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:48,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash -830149624, now seen corresponding path program 1 times [2021-11-23 02:05:48,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:48,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485495987] [2021-11-23 02:05:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:48,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:05:48,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:48,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485495987] [2021-11-23 02:05:48,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485495987] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:48,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542211868] [2021-11-23 02:05:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:48,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:48,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:48,479 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:48,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:05:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:05:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:05:48,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:05:48,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542211868] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:05:48,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:05:48,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 02:05:48,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901854355] [2021-11-23 02:05:48,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:05:48,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:05:48,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:48,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:05:48,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:48,670 INFO L87 Difference]: Start difference. First operand 13 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-23 02:05:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:48,744 INFO L93 Difference]: Finished difference Result 27 states and 42 transitions. [2021-11-23 02:05:48,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:05:48,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2021-11-23 02:05:48,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:48,747 INFO L225 Difference]: With dead ends: 27 [2021-11-23 02:05:48,747 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 02:05:48,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:05:48,755 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:48,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:05:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 02:05:48,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 02:05:48,771 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) [2021-11-23 02:05:48,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-11-23 02:05:48,772 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2021-11-23 02:05:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:48,773 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-11-23 02:05:48,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-23 02:05:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-11-23 02:05:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:05:48,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:48,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:48,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:48,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:48,987 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:48,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1681103082, now seen corresponding path program 1 times [2021-11-23 02:05:48,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:48,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400355086] [2021-11-23 02:05:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:48,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:05:49,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400355086] [2021-11-23 02:05:49,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400355086] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:49,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151745704] [2021-11-23 02:05:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:49,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:49,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:49,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:49,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:05:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:49,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:05:49,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:05:49,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:05:49,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151745704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:49,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773302812] [2021-11-23 02:05:49,395 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:05:49,398 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:05:49,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:05:49,413 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:05:49,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:05:49,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:49,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:49,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:49,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:49,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,048 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:05:50,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:05:50,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2021-11-23 02:05:50,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 02:05:50,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:50,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:50,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:50,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:50,807 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:05:50,808 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 608 treesize of output 598 [2021-11-23 02:05:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:51,753 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:05:51,754 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 59 treesize of output 45 [2021-11-23 02:05:51,815 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:05:51,816 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 15 treesize of output 15 [2021-11-23 02:05:51,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:51,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:51,984 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:05:51,986 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 94 treesize of output 123 [2021-11-23 02:05:52,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,125 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:52,125 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 25 treesize of output 25 [2021-11-23 02:05:52,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,179 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:52,180 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 25 treesize of output 25 [2021-11-23 02:05:52,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:52,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:52,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:52,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,272 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:52,273 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:52,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,340 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:52,341 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 25 treesize of output 25 [2021-11-23 02:05:52,381 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:05:52,384 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 15 treesize of output 15 [2021-11-23 02:05:52,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,495 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:05:52,496 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 94 treesize of output 113 [2021-11-23 02:05:52,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,588 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:52,588 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 25 treesize of output 25 [2021-11-23 02:05:52,625 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:05:52,625 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 15 treesize of output 15 [2021-11-23 02:05:52,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,752 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:05:52,753 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 94 treesize of output 113 [2021-11-23 02:05:52,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,844 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:52,844 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 25 treesize of output 25 [2021-11-23 02:05:52,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,885 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:52,887 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 25 treesize of output 25 [2021-11-23 02:05:52,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:52,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:52,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:52,958 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:52,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:53,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:53,018 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:53,018 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 25 treesize of output 25 [2021-11-23 02:05:53,052 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:05:53,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:05:53,318 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:05:53,318 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:05:53,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-23 02:05:53,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704874321] [2021-11-23 02:05:53,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:05:53,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:05:53,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:05:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:05:53,320 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:53,384 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-11-23 02:05:53,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:05:53,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 02:05:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:53,387 INFO L225 Difference]: With dead ends: 36 [2021-11-23 02:05:53,387 INFO L226 Difference]: Without dead ends: 21 [2021-11-23 02:05:53,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:05:53,391 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:53,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:05:53,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-23 02:05:53,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-23 02:05:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-11-23 02:05:53,402 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 16 [2021-11-23 02:05:53,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:53,402 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-11-23 02:05:53,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:53,403 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-11-23 02:05:53,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:05:53,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:53,404 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:53,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:53,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:53,631 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1618588462, now seen corresponding path program 2 times [2021-11-23 02:05:53,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:53,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595725845] [2021-11-23 02:05:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:53,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:05:53,700 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:53,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595725845] [2021-11-23 02:05:53,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595725845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:53,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521144690] [2021-11-23 02:05:53,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:05:53,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:53,711 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:53,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:05:53,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:05:53,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:05:53,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:05:53,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:05:53,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 02:05:53,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521144690] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:53,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060386843] [2021-11-23 02:05:53,854 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:05:53,854 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:05:53,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:05:53,855 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:05:53,855 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:05:53,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:53,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:53,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:53,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,160 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:05:54,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:05:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2021-11-23 02:05:54,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 02:05:54,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:54,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:54,645 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:05:54,645 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 628 treesize of output 596 [2021-11-23 02:05:54,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:54,849 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:05:54,850 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 59 treesize of output 45 [2021-11-23 02:05:54,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:54,900 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:54,900 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 25 treesize of output 25 [2021-11-23 02:05:54,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:54,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:54,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:54,973 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:54,974 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:55,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,040 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:55,041 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 25 treesize of output 25 [2021-11-23 02:05:55,076 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:05:55,077 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 15 treesize of output 15 [2021-11-23 02:05:55,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,178 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:05:55,179 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 94 treesize of output 113 [2021-11-23 02:05:55,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,261 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:55,261 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 25 treesize of output 25 [2021-11-23 02:05:55,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,304 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:55,305 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 25 treesize of output 25 [2021-11-23 02:05:55,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:55,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:55,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,373 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:55,373 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:55,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,421 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:55,421 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 25 treesize of output 25 [2021-11-23 02:05:55,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,452 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:55,453 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 25 treesize of output 25 [2021-11-23 02:05:55,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:55,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:55,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,513 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:55,513 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:55,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,568 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:55,570 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 25 treesize of output 25 [2021-11-23 02:05:55,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,604 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:55,605 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 25 treesize of output 25 [2021-11-23 02:05:55,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:55,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:55,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,663 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:55,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:55,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:55,713 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:55,713 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 25 treesize of output 25 [2021-11-23 02:05:55,743 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:05:56,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '507#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:05:56,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:05:56,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:05:56,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 02:05:56,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670914747] [2021-11-23 02:05:56,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:05:56,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:05:56,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:05:56,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:05:56,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:05:56,008 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:56,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:05:56,100 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2021-11-23 02:05:56,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:05:56,100 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 02:05:56,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:05:56,101 INFO L225 Difference]: With dead ends: 49 [2021-11-23 02:05:56,101 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 02:05:56,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:05:56,103 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:05:56,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:05:56,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 02:05:56,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-23 02:05:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 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) [2021-11-23 02:05:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-11-23 02:05:56,110 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 19 [2021-11-23 02:05:56,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:05:56,111 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-11-23 02:05:56,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:05:56,111 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-11-23 02:05:56,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 02:05:56,112 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:05:56,113 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:05:56,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:05:56,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:56,339 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:05:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:05:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash -970063028, now seen corresponding path program 3 times [2021-11-23 02:05:56,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:05:56,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87208136] [2021-11-23 02:05:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:05:56,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:05:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:05:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:05:56,451 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:05:56,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87208136] [2021-11-23 02:05:56,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87208136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:05:56,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214612730] [2021-11-23 02:05:56,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:05:56,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:05:56,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:05:56,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:05:56,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:05:56,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:05:56,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:05:56,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:05:56,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:05:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:05:56,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:05:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:05:56,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214612730] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:05:56,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534608084] [2021-11-23 02:05:56,722 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:05:56,722 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:05:56,723 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:05:56,723 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:05:56,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:05:56,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:56,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:56,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:56,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:56,980 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-11-23 02:05:56,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2021-11-23 02:05:57,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,308 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:05:57,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:05:57,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 02:05:57,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:57,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:57,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:57,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:57,719 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:05:57,720 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 608 treesize of output 598 [2021-11-23 02:05:58,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:58,957 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:05:58,957 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 59 treesize of output 45 [2021-11-23 02:05:58,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,002 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:59,003 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 25 treesize of output 25 [2021-11-23 02:05:59,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:59,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,076 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:59,077 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:59,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,134 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:59,135 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 25 treesize of output 25 [2021-11-23 02:05:59,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,171 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:59,172 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 25 treesize of output 25 [2021-11-23 02:05:59,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:59,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:59,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,250 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:59,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:59,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,310 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:59,311 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 25 treesize of output 25 [2021-11-23 02:05:59,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,360 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:59,361 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 25 treesize of output 25 [2021-11-23 02:05:59,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:59,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:59,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:05:59,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,444 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:05:59,445 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:05:59,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,507 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:59,508 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 25 treesize of output 25 [2021-11-23 02:05:59,546 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:05:59,550 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 15 treesize of output 15 [2021-11-23 02:05:59,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,657 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:05:59,658 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 94 treesize of output 113 [2021-11-23 02:05:59,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,745 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:59,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:05:59,780 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:05:59,780 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 15 treesize of output 15 [2021-11-23 02:05:59,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,888 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:05:59,889 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 94 treesize of output 113 [2021-11-23 02:05:59,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:05:59,984 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:05:59,985 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 25 treesize of output 25 [2021-11-23 02:06:00,014 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:00,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '879#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:00,291 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:00,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:00,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-23 02:06:00,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607655112] [2021-11-23 02:06:00,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:00,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:06:00,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:00,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:06:00,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:06:00,293 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:06:00,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:00,387 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-11-23 02:06:00,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 02:06:00,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-23 02:06:00,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:00,388 INFO L225 Difference]: With dead ends: 72 [2021-11-23 02:06:00,389 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 02:06:00,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:06:00,390 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:00,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:00,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 02:06:00,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-23 02:06:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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) [2021-11-23 02:06:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-11-23 02:06:00,398 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 34 [2021-11-23 02:06:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:00,398 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-11-23 02:06:00,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:06:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-11-23 02:06:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:06:00,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:00,400 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:00,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 02:06:00,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:00,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:00,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1145354700, now seen corresponding path program 4 times [2021-11-23 02:06:00,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:00,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344719859] [2021-11-23 02:06:00,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:00,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:06:00,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:00,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344719859] [2021-11-23 02:06:00,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344719859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:00,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012417204] [2021-11-23 02:06:00,827 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:06:00,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:00,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:00,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:00,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:06:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:00,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:00,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:06:01,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:06:01,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012417204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:01,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [998948500] [2021-11-23 02:06:01,278 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:01,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:01,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:01,279 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:01,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:01,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,551 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-11-23 02:06:01,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2021-11-23 02:06:01,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,858 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:06:01,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:06:01,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:01,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 02:06:02,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:02,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:02,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:02,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:02,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:02,256 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:06:02,257 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 608 treesize of output 598 [2021-11-23 02:06:02,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:02,842 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:06:02,842 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 59 treesize of output 45 [2021-11-23 02:06:02,879 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:02,880 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 15 treesize of output 15 [2021-11-23 02:06:02,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:02,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:02,962 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:06:02,962 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 94 treesize of output 123 [2021-11-23 02:06:03,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,027 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:03,028 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 25 treesize of output 25 [2021-11-23 02:06:03,059 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:03,060 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 15 treesize of output 15 [2021-11-23 02:06:03,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,147 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:06:03,147 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 94 treesize of output 113 [2021-11-23 02:06:03,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,218 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:03,219 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 25 treesize of output 25 [2021-11-23 02:06:03,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,253 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:03,253 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 25 treesize of output 25 [2021-11-23 02:06:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:03,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:03,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:03,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,304 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:03,305 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:03,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,363 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:03,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:06:03,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,396 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:03,396 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 25 treesize of output 25 [2021-11-23 02:06:03,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:03,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:03,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,445 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:03,446 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,493 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:03,493 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 25 treesize of output 25 [2021-11-23 02:06:03,526 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:03,527 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 15 treesize of output 15 [2021-11-23 02:06:03,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,607 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:06:03,608 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 94 treesize of output 113 [2021-11-23 02:06:03,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:03,684 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:03,684 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 25 treesize of output 25 [2021-11-23 02:06:03,709 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:03,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1357#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:03,977 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:03,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:03,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-23 02:06:03,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104225784] [2021-11-23 02:06:03,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:03,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:06:03,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:03,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:06:03,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:06:03,980 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:06:04,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:04,087 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-11-23 02:06:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:06:04,088 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-23 02:06:04,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:04,089 INFO L225 Difference]: With dead ends: 84 [2021-11-23 02:06:04,089 INFO L226 Difference]: Without dead ends: 54 [2021-11-23 02:06:04,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2021-11-23 02:06:04,092 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:04,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:04,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-23 02:06:04,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-11-23 02:06:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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) [2021-11-23 02:06:04,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-11-23 02:06:04,113 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 40 [2021-11-23 02:06:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:04,114 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-11-23 02:06:04,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 24 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:06:04,114 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-11-23 02:06:04,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 02:06:04,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:04,119 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:04,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:04,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:04,335 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash -263092532, now seen corresponding path program 5 times [2021-11-23 02:06:04,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:04,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746402599] [2021-11-23 02:06:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:04,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-23 02:06:04,740 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:04,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746402599] [2021-11-23 02:06:04,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746402599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:04,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236265483] [2021-11-23 02:06:04,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:06:04,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:04,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:04,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:04,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:06:04,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:06:04,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:04,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:06:04,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-23 02:06:05,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-11-23 02:06:05,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236265483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1137661944] [2021-11-23 02:06:05,247 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:05,247 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:05,248 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:05,248 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:05,248 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:05,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,449 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-11-23 02:06:05,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2021-11-23 02:06:05,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,785 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:06:05,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:06:05,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:05,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 02:06:06,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:06,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:06,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:06,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:06,230 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:06:06,231 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 608 treesize of output 598 [2021-11-23 02:06:07,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,295 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:06:07,295 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 59 treesize of output 45 [2021-11-23 02:06:07,336 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:07,337 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 15 treesize of output 15 [2021-11-23 02:06:07,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,432 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:06:07,433 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 94 treesize of output 113 [2021-11-23 02:06:07,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,518 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:07,518 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 25 treesize of output 25 [2021-11-23 02:06:07,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,549 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:07,549 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 25 treesize of output 25 [2021-11-23 02:06:07,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:07,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:07,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,605 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:07,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:07,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,656 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:07,657 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 25 treesize of output 25 [2021-11-23 02:06:07,690 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:07,690 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 15 treesize of output 15 [2021-11-23 02:06:07,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,790 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:06:07,791 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 94 treesize of output 113 [2021-11-23 02:06:07,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,859 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:07,859 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 25 treesize of output 25 [2021-11-23 02:06:07,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,894 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:07,894 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 25 treesize of output 25 [2021-11-23 02:06:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:07,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:07,955 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:07,956 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:07,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:08,001 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:08,001 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 25 treesize of output 25 [2021-11-23 02:06:08,035 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:08,035 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 15 treesize of output 15 [2021-11-23 02:06:08,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:08,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:08,114 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:06:08,115 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 94 treesize of output 113 [2021-11-23 02:06:08,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:08,176 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:08,177 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 25 treesize of output 25 [2021-11-23 02:06:08,203 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:08,507 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1965#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:08,507 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:08,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:08,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2021-11-23 02:06:08,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554363278] [2021-11-23 02:06:08,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:08,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 02:06:08,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:08,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 02:06:08,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:06:08,511 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 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) [2021-11-23 02:06:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:08,780 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2021-11-23 02:06:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 02:06:08,781 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 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 52 [2021-11-23 02:06:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:08,782 INFO L225 Difference]: With dead ends: 115 [2021-11-23 02:06:08,783 INFO L226 Difference]: Without dead ends: 85 [2021-11-23 02:06:08,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:06:08,785 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:08,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:06:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-23 02:06:08,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-23 02:06:08,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 84 states have internal predecessors, (91), 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) [2021-11-23 02:06:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-11-23 02:06:08,796 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 52 [2021-11-23 02:06:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:08,797 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-11-23 02:06:08,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 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) [2021-11-23 02:06:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-11-23 02:06:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 02:06:08,799 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:08,799 INFO L514 BasicCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:08,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:09,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:09,016 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:09,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:09,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2056933576, now seen corresponding path program 6 times [2021-11-23 02:06:09,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:09,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883854186] [2021-11-23 02:06:09,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:09,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 02:06:09,461 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:09,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883854186] [2021-11-23 02:06:09,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883854186] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:09,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065987587] [2021-11-23 02:06:09,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:06:09,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:09,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:09,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:09,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:06:09,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:06:09,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:06:09,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 02:06:09,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 02:06:10,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065987587] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:10,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876312244] [2021-11-23 02:06:10,686 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:10,686 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:10,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:10,687 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:10,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:10,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:10,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:10,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:10,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:10,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,060 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:06:11,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:06:11,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2021-11-23 02:06:11,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 02:06:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,465 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:06:11,465 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 628 treesize of output 596 [2021-11-23 02:06:11,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,617 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:06:11,618 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 59 treesize of output 45 [2021-11-23 02:06:11,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,667 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:11,668 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 25 treesize of output 25 [2021-11-23 02:06:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:11,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,715 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:11,716 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,792 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:11,793 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 25 treesize of output 25 [2021-11-23 02:06:11,831 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:11,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 02:06:11,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,914 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:06:11,914 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 94 treesize of output 123 [2021-11-23 02:06:11,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:11,988 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:11,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:06:12,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,018 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:12,018 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 25 treesize of output 25 [2021-11-23 02:06:12,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:12,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:12,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:12,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,089 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:12,089 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:12,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,136 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:12,136 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 25 treesize of output 25 [2021-11-23 02:06:12,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,168 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:12,169 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 25 treesize of output 25 [2021-11-23 02:06:12,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:12,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:12,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:12,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,224 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:12,224 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:12,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,271 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:12,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:06:12,304 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:12,305 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 15 treesize of output 15 [2021-11-23 02:06:12,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,407 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:06:12,407 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 94 treesize of output 123 [2021-11-23 02:06:12,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:12,481 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:12,481 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 25 treesize of output 25 [2021-11-23 02:06:12,513 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:12,953 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2899#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:12,953 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:12,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:12,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2021-11-23 02:06:12,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117433054] [2021-11-23 02:06:12,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:12,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-23 02:06:12,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-23 02:06:12,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:06:12,958 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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) [2021-11-23 02:06:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:13,104 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2021-11-23 02:06:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-23 02:06:13,105 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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 83 [2021-11-23 02:06:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:13,107 INFO L225 Difference]: With dead ends: 170 [2021-11-23 02:06:13,107 INFO L226 Difference]: Without dead ends: 110 [2021-11-23 02:06:13,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:06:13,111 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:13,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:13,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-23 02:06:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-23 02:06:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0642201834862386) internal successors, (116), 109 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) [2021-11-23 02:06:13,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2021-11-23 02:06:13,124 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 83 [2021-11-23 02:06:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:13,125 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2021-11-23 02:06:13,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 50 states have internal predecessors, (65), 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) [2021-11-23 02:06:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2021-11-23 02:06:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 02:06:13,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:13,128 INFO L514 BasicCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:13,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:13,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:13,355 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash -706817012, now seen corresponding path program 7 times [2021-11-23 02:06:13,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:13,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898661046] [2021-11-23 02:06:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:13,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 02:06:14,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:14,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898661046] [2021-11-23 02:06:14,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898661046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:14,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80058911] [2021-11-23 02:06:14,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:06:14,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:14,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:14,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:14,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:06:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:14,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-23 02:06:14,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 02:06:15,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1451 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 02:06:18,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80058911] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:18,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [850304230] [2021-11-23 02:06:18,515 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:18,515 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:18,516 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:18,516 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:18,516 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:18,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,786 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-11-23 02:06:18,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2021-11-23 02:06:18,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:19,130 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:06:19,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:06:19,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:19,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:19,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 02:06:19,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:19,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:19,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:19,481 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:06:19,482 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 608 treesize of output 598 [2021-11-23 02:06:20,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,440 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:06:20,440 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 59 treesize of output 45 [2021-11-23 02:06:20,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,480 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:20,480 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 25 treesize of output 25 [2021-11-23 02:06:20,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:20,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:20,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:20,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,555 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:20,555 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:20,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,631 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:20,631 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 25 treesize of output 25 [2021-11-23 02:06:20,664 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:20,664 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 15 treesize of output 15 [2021-11-23 02:06:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,759 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:06:20,759 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 94 treesize of output 113 [2021-11-23 02:06:20,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,822 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:20,822 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 25 treesize of output 25 [2021-11-23 02:06:20,858 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:20,858 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 15 treesize of output 15 [2021-11-23 02:06:20,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:20,985 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:06:20,986 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 94 treesize of output 113 [2021-11-23 02:06:21,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,073 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:21,073 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 25 treesize of output 25 [2021-11-23 02:06:21,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,118 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:21,118 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 25 treesize of output 25 [2021-11-23 02:06:21,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:21,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:21,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:21,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,189 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:21,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:21,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,256 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:21,257 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 25 treesize of output 25 [2021-11-23 02:06:21,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,290 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:21,291 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 25 treesize of output 25 [2021-11-23 02:06:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:21,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:21,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:21,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,344 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:21,345 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:21,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:21,398 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:21,398 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 25 treesize of output 25 [2021-11-23 02:06:21,423 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:21,812 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4193#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:21,812 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:21,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:21,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2021-11-23 02:06:21,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259215892] [2021-11-23 02:06:21,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:21,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-23 02:06:21,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:21,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-23 02:06:21,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:06:21,821 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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) [2021-11-23 02:06:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:22,056 INFO L93 Difference]: Finished difference Result 220 states and 281 transitions. [2021-11-23 02:06:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-23 02:06:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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 108 [2021-11-23 02:06:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:22,059 INFO L225 Difference]: With dead ends: 220 [2021-11-23 02:06:22,059 INFO L226 Difference]: Without dead ends: 160 [2021-11-23 02:06:22,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 02:06:22,070 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:22,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:06:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-23 02:06:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-11-23 02:06:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0440251572327044) internal successors, (166), 159 states have internal predecessors, (166), 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) [2021-11-23 02:06:22,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2021-11-23 02:06:22,107 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 108 [2021-11-23 02:06:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:22,108 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2021-11-23 02:06:22,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 100 states have internal predecessors, (115), 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) [2021-11-23 02:06:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2021-11-23 02:06:22,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-23 02:06:22,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:22,116 INFO L514 BasicCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:22,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:22,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 02:06:22,335 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:22,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1171222412, now seen corresponding path program 8 times [2021-11-23 02:06:22,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:22,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047320741] [2021-11-23 02:06:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:22,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:26,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-23 02:06:26,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047320741] [2021-11-23 02:06:26,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047320741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:26,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141165339] [2021-11-23 02:06:26,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:06:26,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:26,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:26,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:26,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:06:40,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 02:06:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:40,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:06:40,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2021-11-23 02:06:41,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5126 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 5071 trivial. 0 not checked. [2021-11-23 02:06:41,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141165339] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:41,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330998951] [2021-11-23 02:06:41,953 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:06:41,954 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:41,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:41,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:41,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:06:41,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:41,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:41,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:41,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:41,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:41,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,155 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-11-23 02:06:42,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2021-11-23 02:06:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,420 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:06:42,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:06:42,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 02:06:42,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:42,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:42,692 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:06:42,693 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 628 treesize of output 596 [2021-11-23 02:06:42,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:42,805 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:06:42,805 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 59 treesize of output 45 [2021-11-23 02:06:42,838 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:42,838 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 15 treesize of output 15 [2021-11-23 02:06:42,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:42,937 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:06:42,938 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 94 treesize of output 123 [2021-11-23 02:06:43,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,021 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:43,022 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 25 treesize of output 25 [2021-11-23 02:06:43,051 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:06:43,052 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 15 treesize of output 15 [2021-11-23 02:06:43,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,133 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:06:43,133 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 94 treesize of output 113 [2021-11-23 02:06:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,196 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:43,196 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 25 treesize of output 25 [2021-11-23 02:06:43,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,223 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:43,224 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 25 treesize of output 25 [2021-11-23 02:06:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,268 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:43,268 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:43,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,312 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:43,313 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 25 treesize of output 25 [2021-11-23 02:06:43,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,344 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:43,344 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 25 treesize of output 25 [2021-11-23 02:06:43,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,417 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:43,417 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:43,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,472 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:43,473 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 25 treesize of output 25 [2021-11-23 02:06:43,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,507 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:43,508 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 25 treesize of output 25 [2021-11-23 02:06:43,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:06:43,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,561 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:06:43,561 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:06:43,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:06:43,639 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:06:43,639 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 25 treesize of output 25 [2021-11-23 02:06:43,664 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:06:44,336 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6009#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:06:44,337 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:06:44,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:06:44,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2021-11-23 02:06:44,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147415895] [2021-11-23 02:06:44,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:06:44,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-23 02:06:44,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-23 02:06:44,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 02:06:44,345 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 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) [2021-11-23 02:06:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:44,888 INFO L93 Difference]: Finished difference Result 281 states and 353 transitions. [2021-11-23 02:06:44,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-23 02:06:44,889 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 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) Word has length 158 [2021-11-23 02:06:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:44,894 INFO L225 Difference]: With dead ends: 281 [2021-11-23 02:06:44,895 INFO L226 Difference]: Without dead ends: 221 [2021-11-23 02:06:44,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2021-11-23 02:06:44,901 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:44,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:06:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-23 02:06:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-11-23 02:06:44,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0318181818181817) internal successors, (227), 220 states have internal predecessors, (227), 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) [2021-11-23 02:06:44,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 227 transitions. [2021-11-23 02:06:44,930 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 227 transitions. Word has length 158 [2021-11-23 02:06:44,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:44,932 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 227 transitions. [2021-11-23 02:06:44,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.146341463414634) internal successors, (141), 123 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) [2021-11-23 02:06:44,932 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 227 transitions. [2021-11-23 02:06:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-23 02:06:44,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:44,938 INFO L514 BasicCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:44,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 02:06:45,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:06:45,139 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:45,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:45,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1965795000, now seen corresponding path program 9 times [2021-11-23 02:06:45,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:45,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128948074] [2021-11-23 02:06:45,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:45,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 02:06:49,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128948074] [2021-11-23 02:06:49,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128948074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893321484] [2021-11-23 02:06:49,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:06:49,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:49,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:49,653 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:49,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:06:49,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:06:49,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:06:49,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-23 02:06:49,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 02:06:50,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6215 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 02:07:01,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893321484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:01,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1762404132] [2021-11-23 02:07:01,521 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:07:01,521 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:01,521 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:01,521 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:01,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:01,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,827 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:07:01,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:07:01,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 34 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 47 [2021-11-23 02:07:01,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:01,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2021-11-23 02:07:02,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,171 INFO L354 Elim1Store]: treesize reduction 142, result has 12.3 percent of original size [2021-11-23 02:07:02,172 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 628 treesize of output 596 [2021-11-23 02:07:02,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,309 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:07:02,309 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 59 treesize of output 45 [2021-11-23 02:07:02,343 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:02,344 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 15 treesize of output 15 [2021-11-23 02:07:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,419 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:07:02,420 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 94 treesize of output 123 [2021-11-23 02:07:02,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,483 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:02,484 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 25 treesize of output 25 [2021-11-23 02:07:02,513 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:02,513 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 15 treesize of output 15 [2021-11-23 02:07:02,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,607 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:02,607 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 94 treesize of output 113 [2021-11-23 02:07:02,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,683 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:02,683 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 25 treesize of output 25 [2021-11-23 02:07:02,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,713 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:02,714 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 25 treesize of output 25 [2021-11-23 02:07:02,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:02,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,791 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:07:02,792 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:07:02,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,835 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:02,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-23 02:07:02,860 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:02,861 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 15 treesize of output 15 [2021-11-23 02:07:02,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:02,941 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:02,941 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 94 treesize of output 113 [2021-11-23 02:07:03,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:03,014 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:03,015 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 25 treesize of output 25 [2021-11-23 02:07:03,039 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:07:03,040 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 15 treesize of output 15 [2021-11-23 02:07:03,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:03,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:03,119 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:07:03,119 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 94 treesize of output 113 [2021-11-23 02:07:03,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:07:03,161 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:07:03,161 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 25 treesize of output 25 [2021-11-23 02:07:03,181 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:03,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8515#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:07:03,664 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:03,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:03,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2021-11-23 02:07:03,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079556557] [2021-11-23 02:07:03,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:03,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-11-23 02:07:03,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-11-23 02:07:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 02:07:03,675 INFO L87 Difference]: Start difference. First operand 221 states and 227 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 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) [2021-11-23 02:07:04,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:04,404 INFO L93 Difference]: Finished difference Result 442 states and 554 transitions. [2021-11-23 02:07:04,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-11-23 02:07:04,405 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 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 219 [2021-11-23 02:07:04,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:04,408 INFO L225 Difference]: With dead ends: 442 [2021-11-23 02:07:04,408 INFO L226 Difference]: Without dead ends: 322 [2021-11-23 02:07:04,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2021-11-23 02:07:04,413 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:04,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 60 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:07:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-11-23 02:07:04,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-11-23 02:07:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.0218068535825544) internal successors, (328), 321 states have internal predecessors, (328), 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) [2021-11-23 02:07:04,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 328 transitions. [2021-11-23 02:07:04,433 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 328 transitions. Word has length 219 [2021-11-23 02:07:04,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:04,433 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 328 transitions. [2021-11-23 02:07:04,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 202 states have internal predecessors, (217), 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) [2021-11-23 02:07:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 328 transitions. [2021-11-23 02:07:04,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-11-23 02:07:04,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:04,441 INFO L514 BasicCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:04,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:04,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 02:07:04,663 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:07:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:04,663 INFO L85 PathProgramCache]: Analyzing trace with hash 649549196, now seen corresponding path program 10 times [2021-11-23 02:07:04,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:04,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365517607] [2021-11-23 02:07:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:04,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 02:07:21,359 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:21,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365517607] [2021-11-23 02:07:21,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365517607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:21,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830749185] [2021-11-23 02:07:21,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 02:07:21,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:21,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:21,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:21,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:07:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:21,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 202 conjunts are in the unsatisfiable core [2021-11-23 02:07:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 02:07:22,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 21365 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 02:08:07,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830749185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:07,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1883126137] [2021-11-23 02:08:07,971 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 02:08:07,971 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:07,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:07,972 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:07,972 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:08,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,288 INFO L354 Elim1Store]: treesize reduction 365, result has 12.0 percent of original size [2021-11-23 02:08:08,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 66 [2021-11-23 02:08:08,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,650 INFO L354 Elim1Store]: treesize reduction 528, result has 9.4 percent of original size [2021-11-23 02:08:08,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 32 case distinctions, treesize of input 127 treesize of output 157 [2021-11-23 02:08:08,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 16 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-23 02:08:08,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:08,972 INFO L354 Elim1Store]: treesize reduction 250, result has 15.5 percent of original size [2021-11-23 02:08:08,972 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 608 treesize of output 598 [2021-11-23 02:08:09,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,600 INFO L354 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2021-11-23 02:08:09,600 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 59 treesize of output 45 [2021-11-23 02:08:09,638 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:08:09,638 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 15 treesize of output 15 [2021-11-23 02:08:09,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,707 INFO L354 Elim1Store]: treesize reduction 95, result has 34.9 percent of original size [2021-11-23 02:08:09,708 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 94 treesize of output 123 [2021-11-23 02:08:09,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,783 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:08:09,784 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 25 treesize of output 25 [2021-11-23 02:08:09,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,816 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:08:09,816 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 25 treesize of output 25 [2021-11-23 02:08:09,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:09,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:09,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,863 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:08:09,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:08:09,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,906 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:08:09,907 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 25 treesize of output 25 [2021-11-23 02:08:09,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,934 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:08:09,935 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 25 treesize of output 25 [2021-11-23 02:08:09,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:09,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:09,979 INFO L354 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2021-11-23 02:08:09,979 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 3 case distinctions, treesize of input 104 treesize of output 109 [2021-11-23 02:08:10,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:10,018 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:08:10,019 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 25 treesize of output 25 [2021-11-23 02:08:10,044 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:08:10,044 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 15 treesize of output 15 [2021-11-23 02:08:10,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:10,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:10,113 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:08:10,114 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 94 treesize of output 113 [2021-11-23 02:08:10,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:10,205 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:08:10,206 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 25 treesize of output 25 [2021-11-23 02:08:10,239 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 02:08:10,239 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 15 treesize of output 15 [2021-11-23 02:08:10,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:10,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:10,317 INFO L354 Elim1Store]: treesize reduction 105, result has 28.1 percent of original size [2021-11-23 02:08:10,317 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 94 treesize of output 113 [2021-11-23 02:08:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:08:10,383 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-23 02:08:10,384 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 25 treesize of output 25 [2021-11-23 02:08:10,407 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:11,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12353#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_#t~mem15#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem16#1| |ULTIMATE.start_main_#t~mem15#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (= |ULTIMATE.start_main_#t~mem16#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a6~0#1.base|) (+ |ULTIMATE.start_main_~#a6~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:08:11,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:11,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:08:11,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2021-11-23 02:08:11,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896995246] [2021-11-23 02:08:11,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:11,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2021-11-23 02:08:11,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:11,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2021-11-23 02:08:11,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 02:08:11,388 INFO L87 Difference]: Start difference. First operand 322 states and 328 transitions. Second operand has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 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) [2021-11-23 02:08:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:14,040 INFO L93 Difference]: Finished difference Result 644 states and 857 transitions. [2021-11-23 02:08:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2021-11-23 02:08:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 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 320 [2021-11-23 02:08:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:14,045 INFO L225 Difference]: With dead ends: 644 [2021-11-23 02:08:14,045 INFO L226 Difference]: Without dead ends: 524 [2021-11-23 02:08:14,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1160 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 61.2s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2021-11-23 02:08:14,054 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:14,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:08:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-23 02:08:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2021-11-23 02:08:14,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.0133843212237095) internal successors, (530), 523 states have internal predecessors, (530), 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) [2021-11-23 02:08:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 530 transitions. [2021-11-23 02:08:14,082 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 530 transitions. Word has length 320 [2021-11-23 02:08:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:14,083 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 530 transitions. [2021-11-23 02:08:14,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0345679012345679) internal successors, (419), 404 states have internal predecessors, (419), 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) [2021-11-23 02:08:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 530 transitions. [2021-11-23 02:08:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-11-23 02:08:14,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:14,099 INFO L514 BasicCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:14,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:14,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:08:14,315 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:14,315 INFO L85 PathProgramCache]: Analyzing trace with hash 489073420, now seen corresponding path program 11 times [2021-11-23 02:08:14,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:14,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336831680] [2021-11-23 02:08:14,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:14,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 82268 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2021-11-23 02:09:19,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:19,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336831680] [2021-11-23 02:09:19,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336831680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016147814] [2021-11-23 02:09:19,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:09:19,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:19,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:19,476 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:19,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_053bbca1-c06e-4003-bb3c-83fa150f07af/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process