./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array6_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array6_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:35:40,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:35:40,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:35:40,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:35:40,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:35:40,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:35:40,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:35:40,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:35:40,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:35:40,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:35:40,942 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:35:40,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:35:40,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:35:40,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:35:40,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:35:40,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:35:40,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:35:40,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:35:40,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:35:40,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:35:40,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:35:40,959 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:35:40,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:35:40,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:35:40,965 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:35:40,966 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:35:40,966 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:35:40,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:35:40,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:35:40,969 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:35:40,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:35:40,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:35:40,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:35:40,972 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:35:40,973 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:35:40,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:35:40,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:35:40,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:35:40,975 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:35:40,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:35:40,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:35:40,978 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 18:35:41,005 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:35:41,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:35:41,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:35:41,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:35:41,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:35:41,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:35:41,007 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:35:41,007 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:35:41,007 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:35:41,008 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:35:41,008 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:35:41,008 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:35:41,008 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:35:41,008 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:35:41,009 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:35:41,009 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:35:41,009 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:35:41,009 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:35:41,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:35:41,010 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 18:35:41,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:35:41,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 18:35:41,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:35:41,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:35:41,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:35:41,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:35:41,012 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 18:35:41,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:35:41,012 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:35:41,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:35:41,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:35:41,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:35:41,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:35:41,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:35:41,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:35:41,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:35:41,016 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:35:41,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:35:41,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:35:41,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:35:41,017 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:35:41,017 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_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81db346fb66b40514998cf838e858b3f0793fe5c74d5812efa60193ab54d6833 [2021-11-25 18:35:41,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:35:41,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:35:41,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:35:41,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:35:41,328 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:35:41,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-25 18:35:41,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/data/f4f46404c/f816d8054b574d58be58e0b600bfcfe4/FLAG25a91e514 [2021-11-25 18:35:41,835 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:35:41,836 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/sv-benchmarks/c/array-patterns/array6_pattern.c [2021-11-25 18:35:41,842 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/data/f4f46404c/f816d8054b574d58be58e0b600bfcfe4/FLAG25a91e514 [2021-11-25 18:35:42,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/data/f4f46404c/f816d8054b574d58be58e0b600bfcfe4 [2021-11-25 18:35:42,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:35:42,231 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:35:42,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:35:42,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:35:42,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:35:42,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a846ad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42, skipping insertion in model container [2021-11-25 18:35:42,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:35:42,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:35:42,443 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_f9039192-5c97-4f88-9f27-6e768ab72478/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-25 18:35:42,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:35:42,470 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:35:42,490 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_f9039192-5c97-4f88-9f27-6e768ab72478/sv-benchmarks/c/array-patterns/array6_pattern.c[1356,1369] [2021-11-25 18:35:42,520 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:35:42,535 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:35:42,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42 WrapperNode [2021-11-25 18:35:42,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:35:42,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:35:42,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:35:42,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:35:42,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,560 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,591 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2021-11-25 18:35:42,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:35:42,593 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:35:42,593 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:35:42,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:35:42,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:35:42,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:35:42,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:35:42,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:35:42,646 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (1/1) ... [2021-11-25 18:35:42,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:35:42,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:42,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:35:42,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:35:42,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:35:42,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:35:42,730 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:35:42,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:35:42,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:35:42,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:35:42,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:35:42,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:35:42,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:35:42,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:35:42,799 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:35:42,801 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:35:42,955 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:35:42,987 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:35:42,988 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 18:35:42,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:35:42 BoogieIcfgContainer [2021-11-25 18:35:42,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:35:42,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:35:42,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:35:42,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:35:42,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:35:42" (1/3) ... [2021-11-25 18:35:42,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775f1ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:35:42, skipping insertion in model container [2021-11-25 18:35:42,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:35:42" (2/3) ... [2021-11-25 18:35:42,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775f1ac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:35:42, skipping insertion in model container [2021-11-25 18:35:42,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:35:42" (3/3) ... [2021-11-25 18:35:42,998 INFO L111 eAbstractionObserver]: Analyzing ICFG array6_pattern.c [2021-11-25 18:35:43,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:35:43,004 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:35:43,052 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:35:43,059 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 18:35:43,059 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:35:43,075 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 18:35:43,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:43,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:43,089 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:43,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:43,094 INFO L85 PathProgramCache]: Analyzing trace with hash 857550697, now seen corresponding path program 1 times [2021-11-25 18:35:43,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:43,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041335040] [2021-11-25 18:35:43,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:43,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:35:43,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:43,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041335040] [2021-11-25 18:35:43,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041335040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:43,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:43,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 18:35:43,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940075095] [2021-11-25 18:35:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:43,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 18:35:43,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:43,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 18:35:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:35:43,343 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:35:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:43,374 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-25 18:35:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 18:35:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-25 18:35:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:43,383 INFO L225 Difference]: With dead ends: 24 [2021-11-25 18:35:43,384 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 18:35:43,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 18:35:43,390 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:43,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:35:43,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 18:35:43,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 18:35:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:43,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-25 18:35:43,455 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 11 [2021-11-25 18:35:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:43,457 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-25 18:35:43,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-25 18:35:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-25 18:35:43,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-25 18:35:43,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:43,459 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:43,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:35:43,459 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:43,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1659101310, now seen corresponding path program 1 times [2021-11-25 18:35:43,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:43,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636642190] [2021-11-25 18:35:43,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:43,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:35:43,654 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:43,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636642190] [2021-11-25 18:35:43,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636642190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:43,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:43,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:35:43,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349917869] [2021-11-25 18:35:43,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:43,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:35:43,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:35:43,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:35:43,659 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:43,716 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-11-25 18:35:43,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 18:35:43,717 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-11-25 18:35:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:43,718 INFO L225 Difference]: With dead ends: 19 [2021-11-25 18:35:43,718 INFO L226 Difference]: Without dead ends: 16 [2021-11-25 18:35:43,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:43,721 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:43,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 28 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:35:43,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-25 18:35:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-25 18:35:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:43,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-25 18:35:43,727 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 16 [2021-11-25 18:35:43,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:43,728 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-25 18:35:43,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:43,728 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-25 18:35:43,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 18:35:43,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:43,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:43,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:35:43,737 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:43,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:43,738 INFO L85 PathProgramCache]: Analyzing trace with hash 107201699, now seen corresponding path program 1 times [2021-11-25 18:35:43,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:43,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965355049] [2021-11-25 18:35:43,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:43,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:43,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:35:43,849 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:43,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965355049] [2021-11-25 18:35:43,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965355049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:35:43,850 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:35:43,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:35:43,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721605127] [2021-11-25 18:35:43,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:35:43,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:35:43,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:35:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:43,852 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:43,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:43,897 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-25 18:35:43,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:35:43,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-25 18:35:43,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:43,900 INFO L225 Difference]: With dead ends: 29 [2021-11-25 18:35:43,900 INFO L226 Difference]: Without dead ends: 17 [2021-11-25 18:35:43,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:35:43,909 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 7 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:43,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:35:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-25 18:35:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-25 18:35:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-25 18:35:43,922 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 17 [2021-11-25 18:35:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:43,922 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-25 18:35:43,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-25 18:35:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 18:35:43,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:43,924 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:43,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:35:43,924 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1924715561, now seen corresponding path program 1 times [2021-11-25 18:35:43,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:43,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852015586] [2021-11-25 18:35:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:43,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:43,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:35:43,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [500890385] [2021-11-25 18:35:43,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:43,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:43,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:43,950 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:35:43,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:35:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:44,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:35:44,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:35:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 18:35:44,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:35:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:35:44,350 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852015586] [2021-11-25 18:35:44,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:35:44,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500890385] [2021-11-25 18:35:44,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500890385] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:35:44,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1360179331] [2021-11-25 18:35:44,384 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:35:44,384 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:35:44,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:35:44,394 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:35:44,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:35:44,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,640 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:35:44,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:35:44,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 18:35:44,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:44,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-25 18:35:44,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:44,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:44,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:45,050 INFO L354 Elim1Store]: treesize reduction 155, result has 14.8 percent of original size [2021-11-25 18:35:45,051 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 437 treesize of output 418 [2021-11-25 18:35:45,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:45,214 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:35:45,214 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 58 treesize of output 40 [2021-11-25 18:35:45,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:45,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:45,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:45,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:45,369 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:35:45,370 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:35:45,557 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:35:45,616 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:35:47,062 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '307#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:35:47,062 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:35:47,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:35:47,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-25 18:35:47,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818207649] [2021-11-25 18:35:47,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:35:47,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:35:47,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:47,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:35:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:35:47,066 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:35:47,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:47,263 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-11-25 18:35:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-25 18:35:47,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2021-11-25 18:35:47,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:47,266 INFO L225 Difference]: With dead ends: 49 [2021-11-25 18:35:47,266 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 18:35:47,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-11-25 18:35:47,268 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:47,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 43 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:35:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 18:35:47,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2021-11-25 18:35:47,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:47,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-25 18:35:47,277 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 18 [2021-11-25 18:35:47,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:47,277 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-25 18:35:47,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:35:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-25 18:35:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 18:35:47,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:47,278 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:47,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 18:35:47,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:47,498 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1012202345, now seen corresponding path program 2 times [2021-11-25 18:35:47,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:47,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442844532] [2021-11-25 18:35:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:47,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:47,516 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:35:47,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069514707] [2021-11-25 18:35:47,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:35:47,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:47,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:47,518 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:35:47,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 18:35:47,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 18:35:47,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:35:47,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 18:35:47,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:35:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:35:47,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:35:47,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 18:35:47,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:47,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442844532] [2021-11-25 18:35:47,747 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:35:47,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069514707] [2021-11-25 18:35:47,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069514707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:35:47,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898142414] [2021-11-25 18:35:47,751 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:35:47,751 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:35:47,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:35:47,752 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:35:47,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:35:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:47,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:47,883 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:35:47,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:35:47,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:47,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:47,983 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:35:47,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:35:48,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:48,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-25 18:35:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:48,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:48,216 INFO L354 Elim1Store]: treesize reduction 155, result has 14.8 percent of original size [2021-11-25 18:35:48,217 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 437 treesize of output 418 [2021-11-25 18:35:48,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:48,318 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:35:48,319 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 58 treesize of output 40 [2021-11-25 18:35:48,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:48,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:48,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:48,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:48,432 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:35:48,432 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:35:48,581 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:35:48,611 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:35:49,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '556#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:35:49,785 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:35:49,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:35:49,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-25 18:35:49,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570298694] [2021-11-25 18:35:49,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:35:49,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 18:35:49,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:49,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 18:35:49,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-11-25 18:35:49,787 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:35:49,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:49,860 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-11-25 18:35:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 18:35:49,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-25 18:35:49,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:49,862 INFO L225 Difference]: With dead ends: 28 [2021-11-25 18:35:49,862 INFO L226 Difference]: Without dead ends: 25 [2021-11-25 18:35:49,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-11-25 18:35:49,863 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:49,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 48 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 18:35:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-25 18:35:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-25 18:35:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:35:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-11-25 18:35:49,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2021-11-25 18:35:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:49,870 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-11-25 18:35:49,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-25 18:35:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-11-25 18:35:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 18:35:49,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:49,872 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:49,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 18:35:50,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:50,086 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:50,086 INFO L85 PathProgramCache]: Analyzing trace with hash 2055356873, now seen corresponding path program 3 times [2021-11-25 18:35:50,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:50,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621542909] [2021-11-25 18:35:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:50,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:50,100 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:35:50,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139918711] [2021-11-25 18:35:50,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:35:50,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:50,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:50,118 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:35:50,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 18:35:50,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:35:50,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:35:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-25 18:35:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:35:50,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:35:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 26 [2021-11-25 18:35:50,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 10 [2021-11-25 18:35:50,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-11-25 18:35:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 50 [2021-11-25 18:35:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2021-11-25 18:35:50,814 INFO L354 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2021-11-25 18:35:50,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 330 treesize of output 213 [2021-11-25 18:35:50,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2021-11-25 18:35:50,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 135 [2021-11-25 18:35:50,896 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-25 18:35:50,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 184 [2021-11-25 18:35:50,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 102 [2021-11-25 18:35:50,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:50,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:50,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:50,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 47 [2021-11-25 18:35:50,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 18:35:51,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-25 18:35:51,043 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:35:51,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 118 [2021-11-25 18:35:51,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:51,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 71 [2021-11-25 18:35:51,068 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:35:51,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 109 [2021-11-25 18:35:51,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 29 [2021-11-25 18:35:51,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:51,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:51,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:51,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:51,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:51,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:51,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:51,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:51,574 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-25 18:35:51,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 128 treesize of output 54 [2021-11-25 18:35:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:35:51,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:35:51,864 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_219 (Array Int Int)) (v_ArrVal_214 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_219) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_214) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 (- 4)))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 (- 4))))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1|)))) 0)) is different from false [2021-11-25 18:35:52,194 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:52,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621542909] [2021-11-25 18:35:52,194 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:35:52,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139918711] [2021-11-25 18:35:52,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139918711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:35:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639740606] [2021-11-25 18:35:52,207 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:35:52,207 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:35:52,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:35:52,208 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:35:52,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:35:52,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:52,369 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:35:52,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:35:52,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:52,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:52,499 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:35:52,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:35:52,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:52,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:35:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:52,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:52,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:52,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:52,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:52,808 INFO L354 Elim1Store]: treesize reduction 283, result has 15.8 percent of original size [2021-11-25 18:35:52,809 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 415 treesize of output 408 [2021-11-25 18:35:53,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:53,057 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:35:53,058 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 58 treesize of output 40 [2021-11-25 18:35:53,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:53,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:53,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:53,158 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:35:53,158 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:35:53,275 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:35:53,304 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:35:54,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '767#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:35:54,919 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:35:54,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:35:54,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-25 18:35:54,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466625278] [2021-11-25 18:35:54,920 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:35:54,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-25 18:35:54,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:54,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-25 18:35:54,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=4, NotChecked=64, Total=1190 [2021-11-25 18:35:54,922 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:55,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:55,086 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-11-25 18:35:55,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:35:55,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-11-25 18:35:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:55,088 INFO L225 Difference]: With dead ends: 48 [2021-11-25 18:35:55,088 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 18:35:55,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=4, NotChecked=68, Total=1332 [2021-11-25 18:35:55,090 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:55,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2021-11-25 18:35:55,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 18:35:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2021-11-25 18:35:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:35:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-25 18:35:55,100 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 22 [2021-11-25 18:35:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:55,101 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-25 18:35:55,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:35:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-25 18:35:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:35:55,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:55,102 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:55,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 18:35:55,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 18:35:55,306 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:55,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:55,306 INFO L85 PathProgramCache]: Analyzing trace with hash -708711620, now seen corresponding path program 4 times [2021-11-25 18:35:55,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:55,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248429451] [2021-11-25 18:35:55,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:55,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:55,331 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:35:55,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85034708] [2021-11-25 18:35:55,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:35:55,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:55,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:55,343 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:35:55,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 18:35:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:35:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:35:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:35:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:35:55,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:35:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:35:55,643 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:55,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248429451] [2021-11-25 18:35:55,644 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:35:55,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85034708] [2021-11-25 18:35:55,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85034708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:35:55,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323699579] [2021-11-25 18:35:55,647 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:35:55,648 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:35:55,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:35:55,649 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:35:55,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:35:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:55,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:55,773 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:35:55,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:35:55,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:55,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:55,853 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:35:55,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:35:55,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:55,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:55,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:55,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-25 18:35:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:56,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:56,102 INFO L354 Elim1Store]: treesize reduction 155, result has 14.8 percent of original size [2021-11-25 18:35:56,102 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 437 treesize of output 418 [2021-11-25 18:35:56,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:56,189 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:35:56,190 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 58 treesize of output 40 [2021-11-25 18:35:56,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:56,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:56,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:56,279 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:35:56,279 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:35:56,395 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:35:56,421 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:35:57,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1054#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:35:57,602 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:35:57,602 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:35:57,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 18:35:57,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566467998] [2021-11-25 18:35:57,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:35:57,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:35:57,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:35:57,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:35:57,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:35:57,605 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:35:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:35:57,783 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-11-25 18:35:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 18:35:57,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-25 18:35:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:35:57,788 INFO L225 Difference]: With dead ends: 59 [2021-11-25 18:35:57,788 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 18:35:57,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:35:57,790 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:35:57,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:35:57,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 18:35:57,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-11-25 18:35:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 34 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:35:57,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-11-25 18:35:57,803 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 23 [2021-11-25 18:35:57,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:35:57,803 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-11-25 18:35:57,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:35:57,804 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-11-25 18:35:57,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 18:35:57,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:35:57,805 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:35:57,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-25 18:35:58,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:58,025 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:35:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:35:58,026 INFO L85 PathProgramCache]: Analyzing trace with hash -123210237, now seen corresponding path program 5 times [2021-11-25 18:35:58,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:35:58,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424128886] [2021-11-25 18:35:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:35:58,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:35:58,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:35:58,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [137508256] [2021-11-25 18:35:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:35:58,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:35:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:35:58,041 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:35:58,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 18:35:58,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 18:35:58,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:35:58,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 18:35:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:35:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:35:58,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:35:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:35:58,371 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:35:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424128886] [2021-11-25 18:35:58,371 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:35:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137508256] [2021-11-25 18:35:58,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137508256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:35:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1183380151] [2021-11-25 18:35:58,373 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:35:58,373 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:35:58,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:35:58,374 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:35:58,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:35:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:58,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:58,493 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:35:58,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:35:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:58,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:58,600 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:35:58,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:35:58,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:58,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:35:58,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:58,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:58,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:58,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:58,852 INFO L354 Elim1Store]: treesize reduction 283, result has 15.8 percent of original size [2021-11-25 18:35:58,852 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 415 treesize of output 408 [2021-11-25 18:35:59,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:59,103 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:35:59,103 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 58 treesize of output 40 [2021-11-25 18:35:59,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:59,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:35:59,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:59,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:35:59,205 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:35:59,205 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:35:59,342 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:35:59,367 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:00,508 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1376#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:00,508 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:00,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:36:00,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-25 18:36:00,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241006871] [2021-11-25 18:36:00,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:00,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-25 18:36:00,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:00,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-25 18:36:00,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-11-25 18:36:00,511 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:00,695 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-11-25 18:36:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-25 18:36:00,696 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-11-25 18:36:00,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:00,697 INFO L225 Difference]: With dead ends: 52 [2021-11-25 18:36:00,697 INFO L226 Difference]: Without dead ends: 49 [2021-11-25 18:36:00,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-11-25 18:36:00,698 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:00,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:36:00,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-25 18:36:00,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2021-11-25 18:36:00,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-25 18:36:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-25 18:36:00,708 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2021-11-25 18:36:00,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:00,708 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-25 18:36:00,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-25 18:36:00,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 18:36:00,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:00,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:00,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:00,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:00,925 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:00,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:00,926 INFO L85 PathProgramCache]: Analyzing trace with hash 475184706, now seen corresponding path program 6 times [2021-11-25 18:36:00,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:00,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669258787] [2021-11-25 18:36:00,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:00,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:00,939 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:00,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646502049] [2021-11-25 18:36:00,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:36:00,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:00,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:00,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:00,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 18:36:01,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:36:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:36:01,206 WARN L261 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-25 18:36:01,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:01,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:36:01,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 18:36:01,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-25 18:36:01,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-11-25 18:36:01,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 79 [2021-11-25 18:36:01,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:01,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:01,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:01,460 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-25 18:36:01,460 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 135 treesize of output 126 [2021-11-25 18:36:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:01,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:01,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:01,577 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-25 18:36:01,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 162 treesize of output 103 [2021-11-25 18:36:02,361 INFO L354 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2021-11-25 18:36:02,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 419 treesize of output 280 [2021-11-25 18:36:02,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2021-11-25 18:36:02,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 135 [2021-11-25 18:36:02,462 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-25 18:36:02,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 275 treesize of output 265 [2021-11-25 18:36:02,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,589 INFO L354 Elim1Store]: treesize reduction 209, result has 11.1 percent of original size [2021-11-25 18:36:02,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 171 treesize of output 200 [2021-11-25 18:36:02,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,675 INFO L354 Elim1Store]: treesize reduction 115, result has 18.4 percent of original size [2021-11-25 18:36:02,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 91 [2021-11-25 18:36:02,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 18:36:02,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-25 18:36:02,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 139 [2021-11-25 18:36:02,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:02,827 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-11-25 18:36:02,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 134 treesize of output 99 [2021-11-25 18:36:03,211 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:36:03,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 102 [2021-11-25 18:36:03,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-25 18:36:05,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:05,992 INFO L354 Elim1Store]: treesize reduction 286, result has 24.1 percent of original size [2021-11-25 18:36:05,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 15 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 213 treesize of output 171 [2021-11-25 18:36:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:06,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:06,828 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_457 (Array Int Int)) (v_ArrVal_455 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse0 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_455) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_457) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 (- 4))) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 (- 4))))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse0) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse1 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 |c_ULTIMATE.start_main_~#array2~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1|)))) 0)) is different from false [2021-11-25 18:36:07,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:07,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669258787] [2021-11-25 18:36:07,111 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:07,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646502049] [2021-11-25 18:36:07,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646502049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:36:07,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1029936961] [2021-11-25 18:36:07,114 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:36:07,114 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:07,114 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:07,114 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:07,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:07,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:07,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:07,211 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:36:07,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:36:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:07,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:07,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 18:36:07,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:07,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:07,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:36:07,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:07,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:07,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:07,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:07,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:07,807 INFO L354 Elim1Store]: treesize reduction 283, result has 15.8 percent of original size [2021-11-25 18:36:07,807 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 415 treesize of output 408 [2021-11-25 18:36:08,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:08,026 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:36:08,027 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 58 treesize of output 40 [2021-11-25 18:36:08,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:08,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:08,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:08,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:08,126 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:08,127 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:08,232 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:36:08,252 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:10,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1666#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:10,189 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:10,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:36:10,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-25 18:36:10,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9907104] [2021-11-25 18:36:10,189 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:10,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:36:10,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:10,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:36:10,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1195, Unknown=4, NotChecked=70, Total=1406 [2021-11-25 18:36:10,191 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:36:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:10,866 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-11-25 18:36:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-25 18:36:10,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-25 18:36:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:10,867 INFO L225 Difference]: With dead ends: 61 [2021-11-25 18:36:10,867 INFO L226 Difference]: Without dead ends: 58 [2021-11-25 18:36:10,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=4, NotChecked=74, Total=1560 [2021-11-25 18:36:10,869 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:10,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 143 Invalid, 0 Unknown, 90 Unchecked, 0.5s Time] [2021-11-25 18:36:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-25 18:36:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-11-25 18:36:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.175) internal successors, (47), 40 states have internal predecessors, (47), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-25 18:36:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-25 18:36:10,881 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 24 [2021-11-25 18:36:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:10,882 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-25 18:36:10,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:36:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-25 18:36:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:36:10,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:10,884 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:10,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:11,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:11,109 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:11,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1845558755, now seen corresponding path program 7 times [2021-11-25 18:36:11,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:11,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123338600] [2021-11-25 18:36:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:11,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:11,118 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:11,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991033406] [2021-11-25 18:36:11,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:36:11,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:11,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:11,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:11,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 18:36:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:11,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:36:11,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:11,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:36:11,440 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:11,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123338600] [2021-11-25 18:36:11,440 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:11,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991033406] [2021-11-25 18:36:11,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991033406] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:36:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713692315] [2021-11-25 18:36:11,442 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:36:11,443 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:11,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:11,443 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:11,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:11,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:11,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:11,530 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:36:11,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:36:11,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:11,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 65 [2021-11-25 18:36:11,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:11,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:11,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:36:11,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:11,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:11,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:11,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:11,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:12,105 INFO L354 Elim1Store]: treesize reduction 283, result has 15.8 percent of original size [2021-11-25 18:36:12,106 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 415 treesize of output 408 [2021-11-25 18:36:12,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:12,269 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:36:12,269 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 58 treesize of output 40 [2021-11-25 18:36:12,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:12,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:12,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:12,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:12,500 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:12,500 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:12,678 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:36:12,680 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:13,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2015#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:13,896 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:13,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:36:13,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-25 18:36:13,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350677526] [2021-11-25 18:36:13,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:13,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:36:13,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:13,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:36:13,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:36:13,898 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:14,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:14,168 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2021-11-25 18:36:14,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:36:14,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-25 18:36:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:14,170 INFO L225 Difference]: With dead ends: 81 [2021-11-25 18:36:14,170 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 18:36:14,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=313, Invalid=1409, Unknown=0, NotChecked=0, Total=1722 [2021-11-25 18:36:14,172 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:14,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 86 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:36:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 18:36:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2021-11-25 18:36:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:36:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-11-25 18:36:14,189 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 25 [2021-11-25 18:36:14,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:14,189 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-11-25 18:36:14,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:14,190 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-11-25 18:36:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 18:36:14,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:14,194 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:14,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:14,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 18:36:14,421 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1478734852, now seen corresponding path program 8 times [2021-11-25 18:36:14,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:14,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32463754] [2021-11-25 18:36:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:14,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:14,436 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:14,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721988269] [2021-11-25 18:36:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:36:14,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:14,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:14,445 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:14,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 18:36:14,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:36:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:36:14,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 18:36:14,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:14,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:36:14,830 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:14,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32463754] [2021-11-25 18:36:14,831 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:14,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721988269] [2021-11-25 18:36:14,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721988269] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:36:14,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [953244116] [2021-11-25 18:36:14,833 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:36:14,833 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:14,833 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:14,834 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:14,834 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:14,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:14,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:14,956 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:36:14,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:36:14,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,040 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:36:15,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:36:15,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:15,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-25 18:36:15,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:15,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:15,265 INFO L354 Elim1Store]: treesize reduction 155, result has 14.8 percent of original size [2021-11-25 18:36:15,266 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 437 treesize of output 418 [2021-11-25 18:36:15,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:15,360 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:36:15,361 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 58 treesize of output 40 [2021-11-25 18:36:15,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:15,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:15,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:15,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:15,438 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:15,438 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:15,530 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:36:15,549 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:16,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2417#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:16,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:16,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:36:16,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-25 18:36:16,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31462036] [2021-11-25 18:36:16,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:16,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 18:36:16,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 18:36:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-11-25 18:36:16,587 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:16,756 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-11-25 18:36:16,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 18:36:16,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-11-25 18:36:16,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:16,757 INFO L225 Difference]: With dead ends: 71 [2021-11-25 18:36:16,757 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 18:36:16,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2021-11-25 18:36:16,759 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:16,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 106 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:36:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 18:36:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-11-25 18:36:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-25 18:36:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-11-25 18:36:16,772 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2021-11-25 18:36:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:16,773 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-11-25 18:36:16,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-11-25 18:36:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 18:36:16,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:16,774 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:16,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:16,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:16,981 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:16,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:16,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1403594601, now seen corresponding path program 9 times [2021-11-25 18:36:16,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:16,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933782259] [2021-11-25 18:36:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:16,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:17,000 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261454250] [2021-11-25 18:36:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:36:17,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:17,008 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:17,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 18:36:17,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:36:17,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:36:17,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-25 18:36:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:17,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:36:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 18:36:17,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-25 18:36:17,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-11-25 18:36:17,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2021-11-25 18:36:17,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,702 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-25 18:36:17,702 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 91 treesize of output 82 [2021-11-25 18:36:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,816 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-25 18:36:17,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 100 treesize of output 101 [2021-11-25 18:36:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:17,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:17,940 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-25 18:36:17,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 204 treesize of output 133 [2021-11-25 18:36:18,968 INFO L354 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2021-11-25 18:36:18,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 461 treesize of output 312 [2021-11-25 18:36:18,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:18,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2021-11-25 18:36:19,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 135 [2021-11-25 18:36:19,091 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-25 18:36:19,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 297 [2021-11-25 18:36:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,294 INFO L354 Elim1Store]: treesize reduction 277, result has 21.5 percent of original size [2021-11-25 18:36:19,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 203 treesize of output 266 [2021-11-25 18:36:19,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,420 INFO L354 Elim1Store]: treesize reduction 161, result has 24.1 percent of original size [2021-11-25 18:36:19,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 19 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 119 [2021-11-25 18:36:19,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 18:36:19,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-25 18:36:19,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 151 [2021-11-25 18:36:19,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:19,576 INFO L354 Elim1Store]: treesize reduction 68, result has 23.6 percent of original size [2021-11-25 18:36:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 146 treesize of output 118 [2021-11-25 18:36:20,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:20,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 307 [2021-11-25 18:36:20,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-11-25 18:36:20,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2021-11-25 18:36:20,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-25 18:36:21,680 INFO L354 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2021-11-25 18:36:21,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 285 treesize of output 113 [2021-11-25 18:36:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:21,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:22,309 WARN L838 $PredicateComparison]: unable to prove that (or (<= c_~ARR_SIZE~0 4) (forall ((v_ArrVal_742 (Array Int Int)) (v_ArrVal_741 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_741) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_742) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 (- 4)))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 (- 4))))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 16)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)))))) 0))) is different from false [2021-11-25 18:36:22,508 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933782259] [2021-11-25 18:36:22,509 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261454250] [2021-11-25 18:36:22,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261454250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:36:22,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235798495] [2021-11-25 18:36:22,511 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:36:22,511 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:22,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:22,512 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:22,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:22,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:22,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:22,612 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:36:22,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:36:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:22,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:22,707 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:36:22,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:36:22,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:22,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:22,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:36:22,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:22,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:22,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:22,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:22,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:23,162 INFO L354 Elim1Store]: treesize reduction 283, result has 15.8 percent of original size [2021-11-25 18:36:23,163 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 415 treesize of output 408 [2021-11-25 18:36:23,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:23,274 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:36:23,274 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 58 treesize of output 40 [2021-11-25 18:36:23,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:23,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:23,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:23,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:23,483 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:23,483 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:23,633 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:36:23,635 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:25,479 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2772#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:25,479 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:25,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:36:25,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-25 18:36:25,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368720898] [2021-11-25 18:36:25,480 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:25,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:36:25,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:25,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:36:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1346, Unknown=1, NotChecked=76, Total=1640 [2021-11-25 18:36:25,482 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:36:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:26,809 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-11-25 18:36:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:36:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-11-25 18:36:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:26,812 INFO L225 Difference]: With dead ends: 79 [2021-11-25 18:36:26,812 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 18:36:26,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=232, Invalid=1493, Unknown=1, NotChecked=80, Total=1806 [2021-11-25 18:36:26,813 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:26,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 177 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 355 Invalid, 0 Unknown, 67 Unchecked, 1.1s Time] [2021-11-25 18:36:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 18:36:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2021-11-25 18:36:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 52 states have internal predecessors, (61), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-25 18:36:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2021-11-25 18:36:26,830 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2021-11-25 18:36:26,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:26,830 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2021-11-25 18:36:26,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:36:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2021-11-25 18:36:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:36:26,832 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:26,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:26,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:27,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:27,037 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:27,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1777613253, now seen corresponding path program 1 times [2021-11-25 18:36:27,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:27,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834304343] [2021-11-25 18:36:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:27,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:27,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:27,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1111083329] [2021-11-25 18:36:27,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:27,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:27,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:27,074 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:27,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 18:36:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-25 18:36:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:27,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:36:27,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:27,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 18:36:27,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-25 18:36:27,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2021-11-25 18:36:27,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:27,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:27,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2021-11-25 18:36:27,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:27,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:27,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:27,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:27,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2021-11-25 18:36:28,016 INFO L354 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2021-11-25 18:36:28,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 103 [2021-11-25 18:36:28,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-11-25 18:36:28,067 INFO L354 Elim1Store]: treesize reduction 49, result has 18.3 percent of original size [2021-11-25 18:36:28,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 90 [2021-11-25 18:36:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 44 [2021-11-25 18:36:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:28,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:28,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 54 [2021-11-25 18:36:28,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 18:36:28,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-25 18:36:28,720 INFO L354 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2021-11-25 18:36:28,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 348 treesize of output 229 [2021-11-25 18:36:28,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2021-11-25 18:36:28,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 135 [2021-11-25 18:36:28,796 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-25 18:36:28,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 174 treesize of output 184 [2021-11-25 18:36:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:28,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:28,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 68 [2021-11-25 18:36:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:28,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 102 [2021-11-25 18:36:28,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2021-11-25 18:36:28,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2021-11-25 18:36:28,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:28,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 54 [2021-11-25 18:36:28,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 31 [2021-11-25 18:36:28,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-11-25 18:36:29,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:29,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:29,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:29,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:29,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:29,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:29,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:29,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:29,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:29,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:29,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:29,876 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-25 18:36:29,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 3 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 56 [2021-11-25 18:36:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:29,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:30,197 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_854 (Array Int Int)) (v_ArrVal_853 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_853) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_854) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 (- 4))) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 (- 4))))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)))))) 0)) is different from false [2021-11-25 18:36:30,436 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834304343] [2021-11-25 18:36:30,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111083329] [2021-11-25 18:36:30,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111083329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:36:30,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [758362517] [2021-11-25 18:36:30,438 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:36:30,438 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:30,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:30,439 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:30,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:30,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,558 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:36:30,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:36:30,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,638 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:36:30,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:36:30,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:30,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-25 18:36:30,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:30,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:30,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:30,925 INFO L354 Elim1Store]: treesize reduction 155, result has 14.8 percent of original size [2021-11-25 18:36:30,925 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 437 treesize of output 418 [2021-11-25 18:36:30,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:30,998 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:36:30,998 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 58 treesize of output 40 [2021-11-25 18:36:31,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:31,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:31,066 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:31,066 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:31,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:31,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:31,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:31,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:31,163 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:31,163 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:31,232 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:36:31,252 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:32,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3146#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~temp~0#1| 0) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:32,862 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:32,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:36:32,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-25 18:36:32,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893191262] [2021-11-25 18:36:32,863 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:32,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 18:36:32,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:32,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 18:36:32,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1269, Unknown=5, NotChecked=72, Total=1482 [2021-11-25 18:36:32,865 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:36:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:33,064 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-11-25 18:36:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 18:36:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-11-25 18:36:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:33,065 INFO L225 Difference]: With dead ends: 84 [2021-11-25 18:36:33,066 INFO L226 Difference]: Without dead ends: 76 [2021-11-25 18:36:33,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=147, Invalid=1412, Unknown=5, NotChecked=76, Total=1640 [2021-11-25 18:36:33,067 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:33,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 159 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 73 Unchecked, 0.1s Time] [2021-11-25 18:36:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-25 18:36:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-11-25 18:36:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-25 18:36:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2021-11-25 18:36:33,082 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 28 [2021-11-25 18:36:33,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:33,083 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2021-11-25 18:36:33,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-25 18:36:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2021-11-25 18:36:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:36:33,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:33,084 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:33,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:33,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 18:36:33,289 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:33,290 INFO L85 PathProgramCache]: Analyzing trace with hash 561494428, now seen corresponding path program 10 times [2021-11-25 18:36:33,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:33,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293830707] [2021-11-25 18:36:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:33,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:33,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:33,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879583739] [2021-11-25 18:36:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-25 18:36:33,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:33,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:33,306 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:33,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 18:36:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:36:33,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:36:33,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:33,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:36:33,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:33,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293830707] [2021-11-25 18:36:33,671 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:33,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879583739] [2021-11-25 18:36:33,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879583739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:36:33,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [341778218] [2021-11-25 18:36:33,673 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:36:33,673 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:33,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:33,674 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:33,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:33,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:33,784 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:36:33,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:36:33,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:33,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:33,873 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:36:33,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:36:33,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:33,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:33,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:36:33,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:33,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:33,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:33,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:33,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:34,191 INFO L354 Elim1Store]: treesize reduction 283, result has 15.8 percent of original size [2021-11-25 18:36:34,191 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 415 treesize of output 408 [2021-11-25 18:36:34,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:34,366 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:36:34,367 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 58 treesize of output 40 [2021-11-25 18:36:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:34,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:34,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:34,585 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:34,586 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:34,739 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:36:34,741 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:36,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3574#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:36,245 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:36,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:36:36,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-25 18:36:36,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382298474] [2021-11-25 18:36:36,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:36,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:36:36,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:36,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:36:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:36:36,247 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:36,698 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2021-11-25 18:36:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-25 18:36:36,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-25 18:36:36,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:36,700 INFO L225 Difference]: With dead ends: 112 [2021-11-25 18:36:36,700 INFO L226 Difference]: Without dead ends: 101 [2021-11-25 18:36:36,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=475, Invalid=2177, Unknown=0, NotChecked=0, Total=2652 [2021-11-25 18:36:36,701 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:36,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 141 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 18:36:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-25 18:36:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-11-25 18:36:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.15) internal successors, (69), 60 states have internal predecessors, (69), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:36:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2021-11-25 18:36:36,715 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 27 [2021-11-25 18:36:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:36,715 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2021-11-25 18:36:36,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2021-11-25 18:36:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 18:36:36,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:36,717 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:36,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-25 18:36:36,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 18:36:36,918 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:36,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:36,919 INFO L85 PathProgramCache]: Analyzing trace with hash 587607715, now seen corresponding path program 11 times [2021-11-25 18:36:36,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:36,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221421165] [2021-11-25 18:36:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:36,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:36,930 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:36,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981160614] [2021-11-25 18:36:36,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:36:36,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:36,947 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:36,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 18:36:37,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:36:37,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:36:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 18:36:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:37,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:37,464 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 18:36:37,464 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:37,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221421165] [2021-11-25 18:36:37,464 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981160614] [2021-11-25 18:36:37,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981160614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:36:37,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1850529725] [2021-11-25 18:36:37,467 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:36:37,467 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:37,467 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:37,468 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:37,468 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:37,561 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:36:37,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:36:37,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:37,644 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:36:37,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:36:37,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:37,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:37,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-25 18:36:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:37,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:37,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:38,012 INFO L354 Elim1Store]: treesize reduction 283, result has 15.8 percent of original size [2021-11-25 18:36:38,013 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 415 treesize of output 408 [2021-11-25 18:36:38,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:38,144 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:36:38,144 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 58 treesize of output 40 [2021-11-25 18:36:38,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:38,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:38,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:38,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:38,320 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:38,320 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:38,453 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 14 for LOIs [2021-11-25 18:36:38,455 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:39,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4082#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (<= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= 0 |#NULL.offset|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:39,723 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:39,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 18:36:39,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-25 18:36:39,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063860869] [2021-11-25 18:36:39,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:39,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-25 18:36:39,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:39,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-25 18:36:39,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-11-25 18:36:39,726 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:39,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:39,936 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-11-25 18:36:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 18:36:39,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-25 18:36:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:39,938 INFO L225 Difference]: With dead ends: 101 [2021-11-25 18:36:39,938 INFO L226 Difference]: Without dead ends: 98 [2021-11-25 18:36:39,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 18:36:39,939 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:39,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 121 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 18:36:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-25 18:36:39,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-11-25 18:36:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 9 states have call successors, (9), 9 states have call predecessors, (9), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-25 18:36:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2021-11-25 18:36:39,957 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 27 [2021-11-25 18:36:39,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:39,957 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2021-11-25 18:36:39,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-25 18:36:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2021-11-25 18:36:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 18:36:39,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:39,959 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:39,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:40,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:40,169 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:40,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1035704738, now seen corresponding path program 12 times [2021-11-25 18:36:40,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:40,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577878203] [2021-11-25 18:36:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:40,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:40,188 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:40,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270130087] [2021-11-25 18:36:40,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-25 18:36:40,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:40,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:40,191 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:40,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 18:36:40,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-25 18:36:40,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:36:40,756 WARN L261 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-25 18:36:40,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:40,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:36:40,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 18:36:40,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-25 18:36:40,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-25 18:36:40,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-11-25 18:36:40,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 42 [2021-11-25 18:36:40,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:40,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:40,954 INFO L354 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2021-11-25 18:36:40,955 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 91 treesize of output 82 [2021-11-25 18:36:41,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,081 INFO L354 Elim1Store]: treesize reduction 44, result has 22.8 percent of original size [2021-11-25 18:36:41,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 100 treesize of output 101 [2021-11-25 18:36:41,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,207 INFO L354 Elim1Store]: treesize reduction 52, result has 20.0 percent of original size [2021-11-25 18:36:41,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 11 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 29 case distinctions, treesize of input 124 treesize of output 131 [2021-11-25 18:36:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:41,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:41,344 INFO L354 Elim1Store]: treesize reduction 60, result has 17.8 percent of original size [2021-11-25 18:36:41,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 46 case distinctions, treesize of input 246 treesize of output 163 [2021-11-25 18:36:42,396 INFO L354 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2021-11-25 18:36:42,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 503 treesize of output 344 [2021-11-25 18:36:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 130 [2021-11-25 18:36:42,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 135 [2021-11-25 18:36:42,566 INFO L354 Elim1Store]: treesize reduction 100, result has 17.4 percent of original size [2021-11-25 18:36:42,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 329 [2021-11-25 18:36:42,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,791 INFO L354 Elim1Store]: treesize reduction 350, result has 25.7 percent of original size [2021-11-25 18:36:42,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 235 treesize of output 327 [2021-11-25 18:36:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:42,908 INFO L354 Elim1Store]: treesize reduction 222, result has 21.6 percent of original size [2021-11-25 18:36:42,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 24 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 132 [2021-11-25 18:36:42,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-25 18:36:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-25 18:36:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 617 treesize of output 589 [2021-11-25 18:36:44,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 584 treesize of output 534 [2021-11-25 18:36:44,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 18:36:44,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 496 treesize of output 430 [2021-11-25 18:36:44,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:44,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 456 treesize of output 424 [2021-11-25 18:36:47,904 INFO L354 Elim1Store]: treesize reduction 45, result has 8.2 percent of original size [2021-11-25 18:36:47,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 15 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 408 treesize of output 168 [2021-11-25 18:36:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 18:36:47,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:36:48,886 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((v_ArrVal_1180 (Array Int Int)) (v_ArrVal_1186 (Array Int Int))) (= (let ((.cse3 (* |c_ULTIMATE.start_main_~index~0#1| 4))) (let ((.cse1 (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1180) |c_ULTIMATE.start_main_~#array2~0#1.base|) (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| v_ArrVal_1186) |c_ULTIMATE.start_main_~#array2~0#1.base|))) (+ (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 4)) (select .cse4 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| .cse3 (- 4)))))))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base| (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#array1~0#1.base|))) (store .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3) (+ (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 4)) (select .cse2 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| .cse3 (- 4))))))) |c_ULTIMATE.start_main_~#array2~0#1.base| .cse1) |c_ULTIMATE.start_main_~#array1~0#1.base|))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array1~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 16)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 8)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 12)) (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 20)) (select .cse1 |c_ULTIMATE.start_main_~#array2~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 20)) |c_ULTIMATE.start_main_~sum~0#1| (select .cse1 (+ |c_ULTIMATE.start_main_~#array2~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 8)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 12)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array1~0#1.offset| 16)))))) 0)) (<= c_~ARR_SIZE~0 5)) is different from false [2021-11-25 18:36:51,318 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:36:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577878203] [2021-11-25 18:36:51,318 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 18:36:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270130087] [2021-11-25 18:36:51,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270130087] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:36:51,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [566926686] [2021-11-25 18:36:51,320 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 18:36:51,320 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:36:51,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:36:51,320 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:36:51,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:36:51,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,457 INFO L354 Elim1Store]: treesize reduction 135, result has 25.0 percent of original size [2021-11-25 18:36:51,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2021-11-25 18:36:51,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,549 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 18:36:51,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 44 treesize of output 69 [2021-11-25 18:36:51,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:51,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 55 [2021-11-25 18:36:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:51,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:51,797 INFO L354 Elim1Store]: treesize reduction 155, result has 14.8 percent of original size [2021-11-25 18:36:51,800 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 437 treesize of output 418 [2021-11-25 18:36:51,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:51,879 INFO L354 Elim1Store]: treesize reduction 21, result has 52.3 percent of original size [2021-11-25 18:36:51,880 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 58 treesize of output 40 [2021-11-25 18:36:51,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:51,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:51,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:51,957 INFO L354 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2021-11-25 18:36:51,958 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 5 case distinctions, treesize of input 99 treesize of output 75 [2021-11-25 18:36:52,064 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 71 for LOIs [2021-11-25 18:36:52,091 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 18:36:54,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4526#(and (<= 0 |ULTIMATE.start_main_~count~0#1|) (<= 0 (+ 32768 |ULTIMATE.start_main_~index~0#1|)) (<= |ULTIMATE.start_main_~index~0#1| 32767) (= |ULTIMATE.start_main_~#array2~0#1.offset| 0) (<= ~ARR_SIZE~0 |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 (+ ~ARR_SIZE~0 32768)) (<= 0 |ULTIMATE.start_main_~#array1~0#1.base|) (<= (+ |ULTIMATE.start_main_~num~0#1| 1) 0) (<= 0 (+ |ULTIMATE.start_main_~num~0#1| 1)) (= |ULTIMATE.start_main_~#array1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_~sum~0#1| 0) 1 0)) (<= 0 |ULTIMATE.start_main_~#array2~0#1.base|) (<= ~ARR_SIZE~0 32767) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~temp~0#1|) (<= |ULTIMATE.start_main_~temp~0#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 18:36:54,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 18:36:54,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-25 18:36:54,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-25 18:36:54,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249964857] [2021-11-25 18:36:54,639 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-25 18:36:54,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-25 18:36:54,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:36:54,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-25 18:36:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1573, Unknown=2, NotChecked=82, Total=1892 [2021-11-25 18:36:54,641 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:36:56,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:36:56,597 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-11-25 18:36:56,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-25 18:36:56,598 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-25 18:36:56,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:36:56,599 INFO L225 Difference]: With dead ends: 103 [2021-11-25 18:36:56,599 INFO L226 Difference]: Without dead ends: 100 [2021-11-25 18:36:56,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=250, Invalid=1732, Unknown=2, NotChecked=86, Total=2070 [2021-11-25 18:36:56,601 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:36:56,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 201 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 437 Invalid, 0 Unknown, 33 Unchecked, 1.5s Time] [2021-11-25 18:36:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-25 18:36:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2021-11-25 18:36:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 68 states have (on average 1.161764705882353) internal successors, (79), 68 states have internal predecessors, (79), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-25 18:36:56,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-25 18:36:56,621 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 28 [2021-11-25 18:36:56,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:36:56,622 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-25 18:36:56,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-25 18:36:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-25 18:36:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-25 18:36:56,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:36:56,623 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:36:56,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 18:36:56,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 18:36:56,825 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:36:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:36:56,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1177873296, now seen corresponding path program 2 times [2021-11-25 18:36:56,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:36:56,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914633110] [2021-11-25 18:36:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:36:56,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:36:56,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 18:36:56,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698644237] [2021-11-25 18:36:56,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 18:36:56,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:36:56,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:36:56,847 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:36:56,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9039192-5c97-4f88-9f27-6e768ab72478/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 18:36:57,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 18:36:57,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 18:36:57,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-25 18:36:57,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:36:57,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-25 18:36:57,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 18:36:57,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2021-11-25 18:36:57,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 16 [2021-11-25 18:36:57,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2021-11-25 18:36:57,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 77 [2021-11-25 18:36:57,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 42 [2021-11-25 18:36:57,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 81 [2021-11-25 18:36:57,476 INFO L354 Elim1Store]: treesize reduction 31, result has 13.9 percent of original size [2021-11-25 18:36:57,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 81 [2021-11-25 18:36:57,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-11-25 18:36:57,496 INFO L354 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2021-11-25 18:36:57,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 67 [2021-11-25 18:36:57,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 44 [2021-11-25 18:36:57,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-11-25 18:36:57,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-25 18:36:57,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-11-25 18:36:57,630 INFO L354 Elim1Store]: treesize reduction 41, result has 10.9 percent of original size [2021-11-25 18:36:57,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 199 treesize of output 145 [2021-11-25 18:36:57,708 INFO L354 Elim1Store]: treesize reduction 62, result has 15.1 percent of original size [2021-11-25 18:36:57,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 147 [2021-11-25 18:36:57,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,759 INFO L354 Elim1Store]: treesize reduction 90, result has 22.4 percent of original size [2021-11-25 18:36:57,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 101 [2021-11-25 18:36:57,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:57,803 INFO L354 Elim1Store]: treesize reduction 129, result has 16.8 percent of original size [2021-11-25 18:36:57,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 91 [2021-11-25 18:36:57,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2021-11-25 18:36:57,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 96 [2021-11-25 18:36:57,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2021-11-25 18:36:59,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:59,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:59,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:36:59,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:36:59,261 INFO L354 Elim1Store]: treesize reduction 778, result has 8.7 percent of original size [2021-11-25 18:36:59,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 13 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 71 case distinctions, treesize of input 235 treesize of output 210 [2021-11-25 18:37:07,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:07,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:07,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:07,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:07,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:07,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:07,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:37:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:07,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 18:37:08,794 INFO L354 Elim1Store]: treesize reduction 2206, result has 11.4 percent of original size [2021-11-25 18:37:08,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 18 select indices, 18 select index equivalence classes, 21 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 164 case distinctions, treesize of input 264 treesize of output 445